JP6714330B2 - Cardiopulmonary resuscitation assist device - Google Patents

Description

The present invention relates to a cardiopulmonary resuscitation assisting device for assisting proper chest compression in performing or training cardiopulmonary resuscitation by chest compression.

BACKGROUND ART Cardiopulmonary resuscitation (CPR) by compressing the chest has been known as one of the life-saving measures for cardiac arrest. As is generally known, cardiopulmonary resuscitation is a technique in which a rescuer intermittently presses the chest of a rescued person who is in cardiac arrest and artificially produces a heartbeat, thereby improving blood circulation. It keeps the oxygen supply to the brain and so on, and promotes the resumption of heartbeat.

By the way, in cardiopulmonary resuscitation with chest compressions, it is appropriate to select the depth of chest compressions during compressions, the number of compressions per unit time, sufficient chest release (recoil) between chest compressions, and the ratio of chest compression time (duty cycle). It is considered important that the survival rate is improved and the prognosis is improved by performing appropriate cardiopulmonary resuscitation.

However, even now, there has not yet been provided a device that indicates the correct chest compression position and appropriately assists CPR. Especially in cardiopulmonary resuscitation, it is considered effective to place a stress point on the lower half of the ribs, but by actually detecting it, it is possible to judge whether or not the stress is placed at an appropriate chest compression position, There was no cardiopulmonary resuscitation assistive device that could guide the force to a different chest compression position.

In addition, in Japanese Patent No. 4689979 (Patent Document 1), a rescuer is notified of the determination result of whether or not chest compression and release are appropriately performed for the purpose of easily performing cardiopulmonary resuscitation. Cardiopulmonary resuscitation assistive devices have been proposed. However, the device described in Patent Document 1 is housed in the accelerometer housing by attaching the accelerometer housing to the chest of the person to be rescued and pressing the chest of the person to be rescued through the accelerometer housing. The acceleration sensor merely detects a change in acceleration due to compression and release, and determines whether or not the compression and release of the chest is appropriately performed based on the detection result.

Moreover, in the cardiopulmonary resuscitation assisting device of Patent Document 1, since a hard accelerometer housing is attached and attached to the chest of the person to be rescued, the chest surface of the person to be rescued composed of a complicated curved surface with individual differences It is difficult to attach and hold in close contact with. Therefore, there may occur a problem such as a variation in detection accuracy due to rattling of the accelerometer housing, or a fall from the chest. In addition, chest compressions via a rigid accelerometer housing tend to cause pain and injuries on the victim's chest, the rescuer's hands, and the like.

In addition, a life saver trained in ordinary cardiopulmonary resuscitation is not accustomed to indirectly compressing the chest of a person to be rescued through a rigid accelerometer housing, and thus is described in Patent Document 1. The use of a cardiopulmonary resuscitation assistive device may rather make proper compression difficult. Note that the cardiopulmonary resuscitation assisting device described in Patent Document 1 may be used at the time of training, but in that case, conversely, the cardiopulmonary resuscitation is urgently performed without passing through the hard accelerometer housing that is always used for training. When it is necessary to perform surgery, there is a possibility that direct chest compression, which is different from that during training, is required, and that cardiopulmonary resuscitation cannot be properly performed.

Japanese Patent No. 4689979

The present invention has been made in the background of the above circumstances, and the problem to be solved is to maintain the wearing state and stabilize the detection accuracy in accordance with the shape of the chest surface, and to make the user feel uncomfortable. It is an object of the present invention to provide a cardiopulmonary resuscitation assisting device having a novel structure, in which

Hereinafter, embodiments of the present invention made to solve such problems will be described. The constituent elements used in each of the following aspects can be used in any combination as much as possible.

A first aspect of the present invention is a cardiopulmonary resuscitation assisting device for assisting cardiopulmonary resuscitation by chest compression, comprising a pressure sensitive part to be superimposed on the chest, and the pressure sensitive part is formed of an elastomer. a flexible dielectric layer one flexible first electrode formed of a conductive elastomer to the surface of the causes directly superimposed with a flexible formed by conductive elastomer on the other surface of the dielectric layer first The dielectric layer has a laminated structure in which two electrodes are directly laminated , and the dielectric layer is a compressible and flat sheet, and the pressure-sensitive portion has a dielectric layer sandwiched between the dielectric layers. Detection for detecting a change in capacitance due to a change in the facing distance between the first electrode and the second electrode based on the compressive deformation of the dielectric due to the facing portion of the first electrode and the second electrode. While a portion is provided at a plurality of locations, a power supply device for applying a measurement voltage is connected to the first electrode and the second electrode, and the first electrode and the second electrode A detection means for detecting the capacitance of the detection unit is connected to the detection unit. Further, based on the value of the capacitance of the detection unit obtained by the detection unit, the number of chest compressions and the chest per unit time A process of calculating at least one evaluation information of the number of times of compression, the depth of chest compression when chest is compressed, the depth of chest compression when chest is released, and the ratio of the time of pressing the chest and the time of returning without pressing the chest. Means are provided, and the processing means calculates the chest compression position as the evaluation information based on the detection value of the electrostatic capacitance of the detection portion obtained by the detection means.

According to the cardiopulmonary resuscitation assisting device having the structure according to the first aspect of the present invention, the pressure-sensitive portion to be superimposed on the chest of the person to be rescued is composed of the capacitance type sensor having the flexible structure. For example, it can be formed as a flexible laminated sheet as a whole, and easily deforms along the surface shape of the chest. Therefore, the pressure-sensitive part can be easily attached to the chest, the pressure-sensitive part can be easily positioned and held on the chest, and the detection accuracy is less likely to decrease due to a gap between the pressure-sensitive part and the chest. Can be detected stably.

In particular, in the present invention, by adopting the capacitance type sensor, it becomes possible to obtain stable measurement accuracy regardless of the environmental conditions, as compared with the conventional acceleration sensor or the like. That is, when detecting the chest compression state with the acceleration sensor, it is difficult to avoid the influence of the elasticity of the back rug on which the survivor is placed, and the survivor on a flexible bed and the survivor on a hard board cannot avoid it. Although the measured values will be different, the cardiopulmonary resuscitation assisting device of the present invention can acquire various measured values associated with chest compression with stable accuracy regardless of such environmental conditions. Also, when it is used for a rescued person being transported by a stretcher, ambulance, helicopter, etc. or a human body model for training, the acceleration sensor affects the detection result due to vibration during transportation, so it is difficult to properly assist CPR. However, if a capacitance type sensor that detects the change in capacitance due to the change in the facing distance between the electrodes is adopted, the effect of vibration during transportation can be avoided and the chest compression can be detected correctly. You can

In addition, by adopting a capacitance type sensor, it becomes possible to guide toward optimizing the chest compression state by a life-saving person, which has not been realized by a conventional acceleration sensor or the like. .. That is, in the electrostatic capacity type sensor, it is possible to detect the pressing state of a plurality of points set in a region spreading in a predetermined area with position information. Therefore, for example, as described in a fourth aspect described later, the pressing position It is also possible to detect the life pressure, and by displaying the information on the pressing force and position on a monitor so that the rescuer can recognize it, life saving can be realized so that more appropriate pressing force and position can be realized. It is possible to easily embarrass someone.

In addition, the pressure-sensitive part of the cardiopulmonary resuscitation assisting device can be flexibly deformed, so that when the rescuer performs cardiopulmonary resuscitation (non-thoracotomy heart massage) by pressing the victim's chest. Also, the discomfort caused by performing chest compression through the pressure sensitive portion is reduced. Therefore, for example, when performing cardiopulmonary resuscitation without a cardiopulmonary resuscitation assisting device after training using the cardiopulmonary resuscitation assisting device according to the present invention, compress the chest of the person to be rescued in the same manner as during the training. Thus, proper CPR can be performed. Moreover, since it is possible to avoid the occurrence of pain or injury due to compression via the cardiopulmonary resuscitation assisting device in the hand of the rescuer or the chest of the survivor, it is possible to cope with, for example, long-term heart massage.

In addition, based on the detection value of the capacitance type sensor (pressure sensitive part) equipped with a detection unit, the number of chest compressions, which is an important parameter in cardiopulmonary resuscitation, the number of chest compressions per unit time, and when chest compressions are performed. The performed cardiopulmonary resuscitation can be evaluated by calculating at least one of the chest indentation depth, the chest indentation depth when the chest is released, and the ratio of chest compression time.

Furthermore, in the cardiopulmonary resuscitation assisting apparatus according to this aspect, it is possible to provide a storage unit that stores the detected value of the capacitance type sensor (pressure sensitive unit) and the measured value calculated by the processing unit over time. Is. By providing such a storage means, for example, based on the information within a specific time such as the present time from the start of measurement, it is possible to obtain the operation time of the chest compression applied to the life-saving person and the time when the operation is interrupted. It can also be output externally.

Further , by providing the detection unit at a plurality of locations of the pressure sensitive unit, for example, the compression position is determined based on the detection result of each detection unit, or the compression amount for each position where each detection unit is provided is determined. It can be measured. In addition, by detecting the compression position of the chest based on the distribution of the capacitance value calculated based on the change in the capacitance of the detection unit, it is possible to determine whether the chest compression position is appropriate and whether cardiopulmonary resuscitation is possible. It is possible to know changes in the compression position during the operation and deviations. Therefore, it becomes possible for a life saver who knows such information to correct the compression position to a more appropriate position based on the information.

A second aspect of the present invention, in the cardiopulmonary resuscitation assisting device described in the first aspect, the first electrode and the second electrode are arranged to intersect at a plurality of locations, each of them At the intersection, the first electrode and the second electrode are opposed to each other with the dielectric layer in between to form the detection unit.

According to the second aspect, by configuring the detection unit at the intersection of the first electrode and the second electrode that intersect with each other, it is possible to provide a plurality of detection units with a simple structure. Further, by disposing the first electrode and the second electrode so as to intersect at a plurality of locations, even if a large number of detection units are provided, wiring etc. for transmitting the detection signals of those detection units can be reduced. Therefore, the structure can be simplified.

A third aspect of the present invention is the cardiopulmonary resuscitation assisting apparatus according to the first or second aspect, wherein the processing means detects the ratio of chest compression time to the elapsed time of cardiopulmonary arrest as the evaluation information. It is calculated based on the value of the capacitance of the detection unit obtained by the means.

According to the third aspect, the effectiveness of the life-saving treatment can be determined by calculating the ratio of the chest compression time to the cardiopulmonary arrest time of the life-saving person. In other words, it is important to shorten the time from the confirmation of cardiopulmonary arrest to the start of cardiopulmonary resuscitation by chest compression and to continuously perform chest compression because it is important for improving the survival rate and good prognosis. It is effective to calculate the ratio as the evaluation information.

A fourth aspect of the present invention is the cardiopulmonary resuscitation assisting apparatus according to any one of the first to third aspects, wherein the processing means detects the change in electrostatic capacitance equal to or greater than a threshold value. A chest is selected, and at least one of the chest pushing depth when the chest is pressed and the chest pushing depth when the chest is released is calculated based on the capacitance value of the selected detecting portion.

According to the fourth aspect, since the error in the detection value due to the difference in the compression area in the pressure-sensitive portion is reduced, the size of the life saver's hand, the chest compression position, etc. are detected in detecting the chest indentation depth. It is possible to suppress the error in the detection result due to the difference between the above, and to detect the pressing depth of the chest stably and accurately. For example, it is possible to calculate at least one of the depth of indentation of the chest when pressing the chest and the depth of indentation of the chest when releasing the chest, based on the average value of the capacitance of the selected detector. As the above, it is only necessary to be able to grasp the overall output of the target detection unit in which the electrostatic capacitance has changed by a threshold value or more, and for example, an arithmetic mean, a geometric mean, or a harmonic mean can be adopted.

A fifth aspect of the present invention is, in the cardiopulmonary resuscitation assisting device described in any one of the first to fourth aspects, the area of the pressure-sensitive portion is equal to or more than the average area of the chest compression portion in the palm of the person. It has been done.

According to the fifth aspect, the area of the pressure-sensitive portion is made larger than the area of the actual chest compression portion in the palm of the life-saving person, and when the life-saving person compresses the chest of the life-saving person, Even if the compression position is slightly displaced, it is possible to effectively detect a change in the capacitance of the detection unit due to compression/release. Preferably, by setting the area of the pressure-sensitive portion to, for example, 900 mm ² or more, which is the average area of the ball of the foot in the palm of a person, at least within the range where cardiopulmonary resuscitation can be effectively performed, it is considered that the compression position is displaced. Also, the change in capacitance due to compression and release of the chest is effectively detected. In addition, the person targeted in this embodiment is a person who is supposed to perform a cardiopulmonary resuscitation operation, and the average area of the chest compression portion in the palm of the adult male and female population can be generally adopted.

A sixth aspect of the present invention is the cardiopulmonary resuscitation assisting device according to any one of the first to fifth aspects, wherein the pressure-sensitive portion is detachably connected to the power supply device and the detecting means. It has been done.

According to the sixth aspect, by periodically exchanging the pressure-sensitive part that comes into direct contact with the life-saving person and the life-saving person, for example, after use, it is possible to maintain the hygiene of the pressure-sensitive part and to reduce the compression force. By exchanging the pressure-sensitive part in which is repeatedly input, the reliability and durability of the cardiopulmonary resuscitation assisting device can be improved. In addition, the pressure-sensitive part, which should be replaced regularly, is detachable from the power supply device and the measuring means, so that it is possible to replace parts of the cardiopulmonary resuscitation assisting device without hygiene and reliability. Etc. can be secured.

A seventh aspect of the present invention is the cardiopulmonary resuscitation assisting device according to any one of the first to sixth aspects, wherein at least one of the first electrode and the second electrode is grounded. It is provided with a noise guard electrode.

According to the seventh aspect, the adverse effect (noise) on the detection caused by the contact between the hand of the life-saving person or the chest of the life-saving person and at least one of the first electrode and the second electrode is prevented by the noise guard electrode. As a result, the detection accuracy can be improved. The noise guard electrode may be provided in the pressure-sensitive part, but for example, it may be provided separately from the pressure-sensitive part and placed between the pressure-sensitive part and the hand of the life-saving person or the chest of the life-saving person. It may be done.

An eighth aspect of the present invention is the cardiopulmonary resuscitation assisting device according to any one of the first to seventh aspects, wherein at least one of the first electrode and the second electrode is grounded. The noise guard electrode is superposed with the insulator layer interposed therebetween.

According to the eighth aspect, the noise guard electrode held at the reference potential is arranged between the electrode of the rescuer's hand or the chest of the person to be rescued and the electrode, and the dielectric constant between the noise guard electrode and the electrode. The large insulation layer prevents the formation of a capacitor between the electrodes of the rescuer's hand or the chest of the victim and avoids adverse effects (noise) on detection. You can

A ninth aspect of the present invention is, in the cardiopulmonary resuscitation assisting device described in any one of the first to eighth aspects, provided with alignment means capable of aligning the pressure sensitive portion on the chest. Is what

According to the ninth aspect, since the pressure-sensitive part is arranged in an appropriate position on the chest of the life-saving person, it is possible for the life-saving person to press the correct position of the pressure-sensitive part. It is possible to press the correct position on the chest of the victim. Therefore, by performing cardiopulmonary resuscitation so that the chest compression parameter detected by the cardiopulmonary resuscitation assisting device becomes an appropriate value, it is possible to perform accurate cardiopulmonary resuscitation by properly compressing the chest of the victim. it can.

A tenth aspect of the present invention is, in the cardiopulmonary resuscitation assisting device described in any one of the first to ninth aspects, informing means for outputting the evaluation information which is the calculation result of the processing means is provided. Is what

According to the tenth aspect, the life saver or another person can easily understand the quality of the cardiopulmonary resuscitation performed by the life saver based on the evaluation information output by the notification means. The notifying means is not particularly limited, and various modes such as sounding and utterance by a speaker, display of visual information on a monitor, lighting of a lamp, and the like can be adopted.

An eleventh aspect of the present invention is the cardiopulmonary resuscitation assisting apparatus according to the tenth aspect, wherein the informing means is monitor display means for displaying a deviation from an appropriate position in the chest compression position. Is.

According to the eleventh aspect, when performing cardiopulmonary resuscitation, it becomes easy for the life-saving person to visually recognize the shift displayed on the monitor and make a correction so as to spontaneously press the appropriate chest compression position. .. In addition, when displaying on the monitor, the chest compression position is displayed in a prominent color such as red or yellow so that it can be easily recognized on the monitor, and the cross point display is also displayed so that the proper position in the lower half of the sternum can be easily understood. It is more preferable to do so. However, the specific monitor display mode is not limited, and for example, the direction necessary to move the detected current chest compression position to an appropriate position is displayed on the monitor with an arrow or a character, or the direction is displayed. At the same time, it is also possible to display the required moving distance on the monitor in the size of the arrow or in characters. If necessary, it is also possible to notify the moving direction and distance by voice.

A twelfth aspect of the present invention is the cardiopulmonary resuscitation assisting apparatus according to the tenth or eleventh aspect, wherein the notifying unit detects the electrostatic capacitance in the pressure sensing unit or the electrostatic capacitance. The value calculated based on the detected value of the capacity is displayed on a map.

According to the twelfth aspect, by displaying the detected value of the electrostatic capacitance or the value calculated based on the detected value of the electrostatic capacitance in a map, information such as the quality of the cardiopulmonary resuscitation and points to be improved This allows the practitioner and his/her assistants to intuitively grasp the information, which contributes to more appropriate CPR implementation.

A thirteenth aspect of the present invention is, in the cardiopulmonary resuscitation assisting device described in any one of the first to twelfth aspects, the detection value by the detection unit or the processing unit from the detection value is obtained. A wireless transmission means for wirelessly transmitting the evaluation information as a transmission signal, a wireless reception means for receiving the transmission signal, and an informing means for informing the evaluation information based on a signal received by the wireless reception means. It is a thing.

According to the thirteenth aspect, by transmitting and receiving the signal of the detection value and the evaluation information by wireless, wiring is not necessary and the information can be obtained at any place as long as the wireless is effective distance. In particular, when performing cardiopulmonary resuscitation while moving a person to be rescued or a human body model for training with a stretcher, etc., wiring is not necessary and the person who assists the rescuer can detect the value. By wirelessly receiving the evaluation information and the evaluation information, it becomes easy to assist the rescuer based on the received information. Moreover, it is possible to avoid the disconnection of the wiring due to the vibration during the movement, so that the reliability can be improved.

According to a fourteenth aspect of the present invention, in the cardiopulmonary resuscitation assisting apparatus according to the thirteenth aspect, the wireless receiving means is composed of a portable terminal.

According to the fourteenth aspect, since the wireless receiving means is a portable terminal (mobile) having excellent portability, the advantage of wirelessly transmitting and receiving information is utilized to receive information at any place. Also, it becomes easy to move while receiving information. In particular, even when an assistant provides information to a moving rescuer to assist cardiopulmonary resuscitation, the assistant can move while obtaining information using a portable terminal, which facilitates assistance.

A fifteenth aspect of the present invention is a cardiopulmonary resuscitation assisting apparatus according to any one of the first to fourteenth aspects, a determining means for determining acceptability based on the determination value set for the evaluation information. In addition to the above, the notifying means for notifying the result of the quality judgment by the judging means is provided.

According to the fifteenth aspect, it is possible to easily grasp whether or not the person who is performing cardiopulmonary resuscitation or his/her assistant is performing the cardiopulmonary resuscitation that is being performed or has been performed by the quality determination. Therefore, it becomes easier to wear effective cardiopulmonary resuscitation especially in the training of cardiopulmonary resuscitation.

The sixteenth aspect of the present invention is, in the cardiopulmonary resuscitation assisting apparatus described in the fifteenth aspect, the policy to be changed in order to make the determination result of the non-defective according to the quality determination result by the determination means. Is provided with an advice means for informing.

According to the sixteenth aspect, effective cardiopulmonary resuscitation can be relatively easily performed by changing the compression depth and rhythm, the length of recoil time, the duty cycle, etc. according to the change policy indicated by the advice means. It can be carried out.

A seventeenth aspect of the present invention is, in the cardiopulmonary resuscitation assisting device according to the fifteenth or sixteenth aspect, chest compression in which the quality determination result by the determination means based on at least one of the evaluation information is good. The time is calculated as a ratio to the elapsed time of cardiopulmonary arrest.

According to the seventeenth aspect, the length of time during which cardiopulmonary resuscitation by chest compression is performed with a certain degree of effectiveness is specified by the quality judgment result by the judgment means, which is effective in the elapsed time of cardiopulmonary arrest. The percentage of time that cardiopulmonary resuscitation was performed can be grasped. In this aspect, since the time when chest compressions were made is specified on the basis that the quality determination result based on at least one evaluation information is good, for example, even for a life saver with a low proficiency level of cardiopulmonary resuscitation, It is possible to grasp the percentage of time when relatively effective chest compressions are performed.

An eighteenth aspect of the present invention is, in the cardiopulmonary resuscitation assisting apparatus described in the seventeenth aspect, the chest compression time when all the quality determination results by the determination means based on the evaluation information are good, and the cardiopulmonary arrest. It is calculated as a ratio to the elapsed time of.

According to the eighteenth aspect, by specifying the length of time during which cardiopulmonary resuscitation by chest compression has been performed with sufficient effectiveness, by specifying the quality judgment result by the judgment means, it is effective in the elapsed time of cardiopulmonary arrest. The percentage of time that cardiopulmonary resuscitation was performed can be grasped. In this aspect, since the time when the chest is compressed is specified on the basis that all of the quality determination results based on the evaluation information are good, for example, a life saver who has a high degree of proficiency in cardiopulmonary resuscitation is more advanced. It can lead to the acquisition of cardiopulmonary resuscitation.

A nineteenth aspect of the present invention is the cardiopulmonary resuscitation assisting device according to any one of the first to eighteenth aspects, wherein a positioning means for positioning the pressure-sensitive portion on the chest is provided. It is a thing.

According to the nineteenth aspect, since the pressure-sensitive portion is positioned on the chest by the positioning means, even if the pressure-sensitive portion is repeatedly pressed, the pressure-sensitive portion is prevented from being displaced on the chest, and cardiopulmonary resuscitation is performed. It becomes easy to carry out appropriately. In particular, when performing cardiopulmonary resuscitation while moving with a stretcher, ambulance, helicopter, etc., it is possible to avoid the problem that the pressure-sensitive part shifts on the chest or falls from the chest due to vibration during movement.

A twenty-second aspect of the present invention is the cardiopulmonary resuscitation assisting device according to any one of the first to nineteenth aspects, wherein the pressure-sensitive portion is used by being attached to a human body model for training. Is.

According to the twentieth aspect, by using the cardiopulmonary resuscitation assisting device according to the present invention for training, it becomes easy to wear correct cardiopulmonary resuscitation based on the evaluation information, and the training can be performed efficiently. it can. Moreover, since a cardiopulmonary resuscitation assisting device having a flexible pressure-sensitive part reduces discomfort caused by the pressure-sensitive part during chest compressions, it can be used when performing cardiopulmonary resuscitation as an actual life-saving activity after training. The difference from training is small, and it can be carried out in the same way as during training.

Twenty-first aspect of the present invention, in cardiopulmonary resuscitation assist device disclosed in aspects of the twentieth, with and a quality determination unit as a reference set judgment value for said evaluation information, After the pressure on the pressure-sensitive portion is finished, the evaluation result display means for displaying the quality judgment result by the judgment means is provided.

According to the twenty-first aspect, a person who has performed cardiopulmonary resuscitation as training can correctly recognize the item to be improved by viewing the quality determination result after the training. As a result, the efficiency of training can be improved, and the technique of cardiopulmonary resuscitation can be improved faster.

According to the present invention, in the cardiopulmonary resuscitation assisting device, since the pressure-sensitive portion to be overlaid on the chest is a flexible capacitive sensor, the pressure-sensitive portion is deformed along the irregularities of the chest. It is easy to hold on the chest, and even with chest compression via the pressure sensitive part, cardiopulmonary resuscitation can be performed with a feeling similar to that when directly compressing the chest, and contact with the pressure sensitive part It also avoids the pain.

The top view which shows the cardiopulmonary resuscitation auxiliary device as 1st embodiment of this invention. FIG. 2 is a perspective exploded view of a sensor body of the cardiopulmonary resuscitation assisting device shown in FIG. 1. FIG. 3 is a vertical sectional view of the sensor body shown in FIG. 2. FIG. 2 is a use state explanatory view showing the cardiopulmonary resuscitation assisting device shown in FIG. 1 attached to a training doll. FIG. 2B is a distribution diagram showing a distribution of detection signals detected during compression of the pressure-sensitive part of the cardiopulmonary resuscitation assisting device shown in FIG. 1, where FIG. Each case is shown when the proper position is strongly pressed. FIG. 2A is a plan view schematically showing the pressure-sensitive portion of the cardiopulmonary resuscitation assisting device shown in FIG. 1, where FIG. The state where the parts are pressed is shown respectively. The graph which shows the detection result at the time of use of the cardiopulmonary resuscitation auxiliary device shown in FIG. 1 like a model. It is a graph which shows the detection result at the time of use of the cardiopulmonary resuscitation assisting apparatus shown in FIG. 1, (a) shows the case where the acquisition interval of detection data is appropriate, (b) shows the acquisition interval of detection data. Indicates the case where is too long. The figure which shows an example of the detected value of the electrostatic capacitance displayed on a monitor in real time during implementation of the cardiopulmonary resuscitation using the cardiopulmonary resuscitation assisting apparatus shown in FIG. It is a display example which shows the detection result at the time of use of the cardiopulmonary resuscitation assisting apparatus shown in FIG. 1, in which (a) shows an appropriate frame rate and (b) shows an inappropriate frame rate. Each case is shown. The figure which shows an example of the quality determination result displayed on a monitor after the completion of the cardiopulmonary resuscitation using the cardiopulmonary resuscitation assisting apparatus shown in FIG. The use condition explanatory view which shows the cardiopulmonary resuscitation assisting device as a second embodiment of the present invention in a state of being attached to a training doll. FIG. 8 is a use state explanatory view showing the cardiopulmonary resuscitation assisting device as another embodiment of the present invention in a state of being attached to a training doll.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a cardiopulmonary resuscitation assisting device 10 as a first embodiment of the present invention. The cardiopulmonary resuscitation assisting device 10 is used in cardiopulmonary resuscitation by chest compression, and is a sensor main body 12 that is superimposed on the chest and detects chest compressions, and a sensor controller that processes the detection result of the sensor main body 12 and the like. 14 and.

As shown in FIGS. 2 and 3, in the sensor body 12, the elastomer sheet 18a is superposed on one surface of the dielectric layer 16, and the elastomer sheet 18b is superposed on the other surface of the dielectric layer 16. Has a structure.

The dielectric layer 16 is made of an electrically insulating elastomer such as rubber or resin, has a plate shape or a sheet shape, has elasticity or flexibility, and is expandable and contractible. In particular, it can be easily deformed in the thickness direction. As the material for forming the dielectric layer 16, for example, silicone rubber, acrylonitrile-butadiene copolymer rubber, acrylic rubber, epichlorohydrin rubber, chlorosulfonated polyethylene, chlorinated polyethylene, urethane rubber, polyethylene resin, polypropylene resin, Polyurethane resin, polystyrene resin, polyvinyl chloride-polyvinylidene chloride copolymer, ethylene-acetic acid copolymer and the like are preferably adopted. Further, the dielectric layer 16 may be a foam, and the foam is not necessarily limited to one that exhibits a homogeneous phase due to closed cells, as long as the required dielectric constant and flexibility are secured, and for example, a continuous foam. It may have an inhomogeneous phase such as formation of bubbles. Further, the thickness and forming material of the dielectric layer 16 are appropriately set according to the relative permittivity and flexibility required in the detection unit 22 described later.

Further, the elastomer sheet 18a is provided with an electrode 20a as a first electrode, and the elastomer sheet 18b is provided with an electrode 20b as a second electrode. The electrodes 20a and 20b are made of, for example, a flexible conductive elastomer in which a conductive filler (for example, metal powder such as carbon black or silver powder) is added to an elastomer such as rubber or resin, and are easily deformable. .. Examples of the elastomer that is a material for forming the electrodes 20a and 20b include silicone rubber, ethylene-propylene copolymer rubber, natural rubber, styrene-butadiene copolymer rubber, acrylonitrile-butadiene copolymer rubber, acrylic rubber, epichlorohydrid. Rubber, chlorosulfonated polyethylene, chlorinated polyethylene, urethane rubber, polyester resin, polyether urethane resin, polycarbonate urethane resin, vinyl chloride-vinyl acetate copolymer, phenol resin, acrylic resin, polyamideimide resin, polyamide resin, nitrocellulose , Modified celluloses and the like are preferably used. The elastomer sheets 18a and 18b are formed of, for example, the same elastomer as the electrodes 20a and 20b. The elastomer sheets 18a and 18b of the present embodiment are transparent or translucent for easy understanding, but they are not necessarily transparent.

Further, each of the electrodes 20a and 20b has a thin longitudinal strip shape, and in the xy plane of two orthogonal axes, five electrodes 20a provided on the elastomer sheet 18a and extending in parallel with the x axis are provided. Five electrodes 20b provided on the elastomer sheet 18b and extending parallel to the y-axis are arranged. The electrode sheet 20a is disposed between the dielectric layer 16 and the elastomer sheet 18a by overlapping the elastomer sheet 18a on one surface of the dielectric layer 16, and the electrode 20a is provided on the one surface of the dielectric layer 16. 1x to 5x are overlapped and extend in parallel with each other. On the other hand, the electrode sheet 20b is disposed between the dielectric layer 16 and the elastomer sheet 18b by overlapping the elastomer sheet 18b on the other surface of the dielectric layer 16, and the electrode 20b is provided on the other surface of the dielectric layer 16. 1b to 5y of 20b are overlapped with each other and extend in parallel with each other at right angles to the electrode 20a. As a result, the electrodes 20a and 20b are disposed so as to intersect at a plurality of points, and capacitors are respectively formed at the facing portions where the electrodes 20a and 20b intersect, and based on changes in the capacitance of the capacitors. A detection unit 22 is formed as an electrostatic capacitance type sensor capable of detecting an input by the above. Although only one detection unit 22 may be provided, in the present embodiment, a plurality of detection units 22 are provided in a dispersed manner by arranging the electrodes 20a and 20b so as to intersect at a plurality of locations. .. Further, the dielectric layer 16 is formed in a shape that is substantially the same as or larger than the disposition regions of the electrodes 20a and 20b on the elastomer sheets 18a and 18b in the plan view shown in FIG. Is sandwiched between the electrodes 20a and 20b. Note that, in FIG. 1, the detection unit 22 is illustrated by hatching with diagonal lines for the sake of easy understanding.

At the intersection (detection portion 22) of the electrodes 20a and 20b, when the dielectric layer 16 is compressed and deformed in the stacking direction of the dielectric layer 16 and the elastomer sheets 18a and 18b, the facing distance between the electrodes 20a and 20b becomes short. , The capacitance of the relevant part changes. Therefore, the sensor controller 14 which is an electrical control device is used to detect the change in the capacitance of each of the detection units 22, thereby detecting the change in the facing distance of the electrodes 20a and 20b in each of the detection units 22. The pressure sensitive portion 24 is configured to be capable of performing the above. That is, each intersecting portion (detection portion 22) of the electrodes 20a and 20b can function as a capacitance type detection element (cell). The detection unit 22 detects a change in electrostatic capacitance due to a change in the facing distance between the electrodes 20a and 20b, and a change in the substantial facing area due to expansion and contraction of the electrodes 20a and 20b and relative displacement in the plane direction. Also, a change in capacitance can be detected. That is, at the time of chest compression described later, not only a change in capacitance due to a change in facing distance can be detected, but also a change in capacitance due to relative displacement in the plane direction or expansion/contraction can be detected.

The pressure sensitive portion 24 of the present embodiment constitutes the sensor main body 12 as a capacitance type sensor in which 25 detecting portions 22 are two-dimensionally arranged in 5 columns×5 rows. Further, the area of the pressure sensitive portion 24 is set to be equal to or larger than the average area of the chest compression portion of the human palm. Suitably, for example, it is set to be equal to or larger than the average area (for example, about 900 mm ² ) of the ball of the foot (the bulge of the palm at the base of the thumb), which is a substantial chest compression portion of the palm of a person. Therefore, it is possible to sufficiently cope with the displacement of the compression position. Further, more preferably, it may be possible to confirm whether or not the pressure is applied by an appropriate part of the palm by setting the average area of the whole palm of the person or more. Note that, in FIG. 1, the pressure sensitive portion 24 is virtually illustrated by a chain double-dashed line for ease of understanding.

Further, the elastomer sheets 18a and 18b extend to the outside of the area where the electrodes 20a and 20b are arranged (the pressure sensitive portion 24), and the wiring 26a is provided outside the electrodes 20a and 20b of the elastomer sheets 18a and 18b, respectively. , 26b are printed with a conductive material. The wiring 26a is connected to the electrode 20a, and the wiring 26b is connected to the electrode 20b. The wirings 26a and 26b can be obtained, for example, as a wiring pattern printed with conductive ink on the surfaces of the elastomer sheets 18a and 18b. Further, the electrodes 20a and 20b can also be formed by printing on the elastomer sheets 18a and 18b in the same manner as the wirings 26a and 26b with a conductive ink formed of a conductive elastomer. Further, the elastomer sheets 18a and 18b are fixed to each other by an adhesive agent or a double-sided tape at the outer peripheral ends outside the regions where the electrodes 20a and 20b are provided and the regions where the wirings 26a and 26b are formed.

An insulator layer 28 is overlaid on the elastomer sheet 18b. The insulator layer 28 is formed of a soft synthetic resin or a rubber elastic body having electrical insulation in addition to flexibility and elasticity, and is formed into a sheet shape or a plate shape with respect to the elastomer sheet 18b. And is laminated on the side opposite to the dielectric layer 16. As a material for forming the insulator layer 28, polyethylene, urethane rubber, or the like is preferably adopted.

Further, a noise guard electrode 30 provided on the elastomer sheet 18c is superposed on the insulator layer 28. Like the electrodes 20a and 20b, the noise guard electrode 30 is formed in a thin film shape with a flexible and expandable/contractible conductive elastomer, and is overlapped with the insulator layer 28 on the side opposite to the elastomer sheet 18b. As a result, the noise guard electrode 30 is superposed on the electrode 20b of the elastomer sheet 18b via the insulator layer 28, and is electrically insulated by the insulator layer 28.

Next, FIG. 3 will be described. The sensor body 12 of this embodiment is covered with a cover 32. The cover 32 is made of cloth, a rubber elastic body, a soft synthetic resin, or the like, and is formed into a bag shape in which the front side sheet and the back side sheet are fixed to each other at the outer peripheral portion, and the dielectric layer 16 and the elastomer are formed. The sensor body 12 including the sheets 18a and 18b, the insulator layer 28, and the noise guard electrode 30 is housed. Further, a compression point illustration 34 as a positioning means is drawn on the surface of the cover 32 (the surface on the side covering the elastomer sheet 18a), and the compression point illustration 34 enables easy alignment on the chest. (See Figure 4). Note that in FIG. 1, the cover 32 is illustrated in a transparent state in order to make the sensor main body 12 in the cover 32 easy to see.

The wiring 26a connected to the electrode 20a is connected to a connector 36a provided in the sensor controller 14 as a processing unit, and the electrode 20a is electrically connected to the sensor controller 14 via the wiring 26a. .. On the other hand, the wiring 26b connected to the electrode 20b is connected to the connector 36b of the sensor controller 14, and the electrode 20b is electrically connected to the sensor controller 14 via the wiring 26b. The wiring 26c connected to the noise guard electrode 30 is connected to the ground terminal 38 provided in the sensor controller 14, the noise guard electrode 30 is grounded, and the potential of the noise guard electrode 30 is set to the reference potential. ing. The wirings 26 a and 26 b are detachably connected to the connectors 36 a and 36 b of the sensor controller 14, and the wiring 26 c is detachably connected to the ground terminal 38 of the sensor controller 14, and the pressure sensing unit 24 is provided. The sensor body 12 is detachably connected to the sensor controller 14.

The sensor controller 14 is, for example, as shown in FIG. 1, a power supply circuit 40 for operating voltage supply as a power supply device connected to the electrodes 20a, 20b via connectors 36a, 36b, respectively. And a detection circuit 42 for detecting capacitance as detection means. The power supply circuit 40 is configured to selectively supply power to 1x to 5x of the electrodes 20a and 1y to 5y of the electrodes 20b, and under the control of the central processing unit (CPU) 44, the power supply circuit 40 can be provided at 25 locations forming a capacitor. A periodic waveform voltage is scan-wise applied as a measurement voltage to each intersection.

Then, the detection signal of the electrostatic capacitance detected under the action of the voltage is sequentially detected by the detection circuit 42, and the detection value is stored in the RAM (random access memory) 46. The detection of the capacitance by the detection circuit 42 is performed, for example, by obtaining the capacitance value using the impedance obtained from the current value.

Further, a ROM (read only memory) 48 stores characteristic data of a capacitor formed at an intersection of the electrodes 20a and 20b, and the CPU 44 eliminates the influence of the wiring resistance based on the characteristic data. It is also possible to obtain the compressive force which is the external force exerted on the intersecting portion of the electrodes 20a and 20b from the detected capacitance value obtained by the above. Note that in FIG. 1, the power supply circuit 40, the detection circuit 42, the CPU 44, the RAM 46, and the ROM 48 are illustrated as functional blocks in the sensor controller 14 for the sake of simplicity.

Therefore, by scanning the electrostatic capacities of the 25 detection units 22 formed at the intersections of the electrodes 20a and 20b that form the capacitors, the two-dimensional distribution of the electrostatic capacitance values can be detected as a whole. ing. It is also possible to obtain a two-dimensional distribution of the compression force based on the detected value of the electrostatic capacitance.

The cardiopulmonary resuscitation assisting device 10 having such a structure is used, for example, in lifesaving treatment or lifesaving training when performing cardiopulmonary resuscitation by chest compression. Below, a specific example of use in lifesaving training will be described.

First, as shown in FIG. 4, a training doll 50 as a person to be rescued, which imitates the whole body or upper body of a human body, is laid down on a stretcher or a floor, and the pressure-sensitive section 24 of the cardiopulmonary resuscitation assisting device 10 is installed. Is attached to the chest of a training doll 50 which is a human body model for training. In the present embodiment, on the chest of the training doll 50, the chest of the training doll 50 is aligned with the chest compression point of the training doll 50 by the compression point illustration 34 as the alignment means drawn on the surface of the cover 32 that covers the pressure sensitive portion 24. The pressure sensitive portion 24 is aligned with. Further, the pressure-sensitive portion 24 may be simply laid on the chest of the training doll 50 in a non-fixed manner. For example, the cover 32 covering the pressure-sensitive portion 24 may be positioned by a positioning means such as a double-sided tape, a surface fastener, or a snap. The pressure-sensitive portion 24 may be removably fixed to the training doll 50 so that the pressure-sensitive portion 24 is positioned and held at a predetermined position on the chest of the training doll 50. The positioning means for positioning the pressure-sensitive portion 24 on the chest is not limited to the above-mentioned examples, but may be, for example, a spray glue, an adhesive, an adhesive polymer, an adhesive polymer, adhesive bonding, heat fusion, or an outer periphery. Locking of parts, fixing with stapler, fixing with tape at the peripheral edge, pinning, rivet fixing, screwing, clamp fixing, band fastening, clip fixing, fitting in a recess provided on the surface of the doll 50, string Various fixing modes such as stopping and fitting of the concavo-convex portions of the overlapping surfaces with an elastomer can be adopted selectively or in any combination. The pressure-sensitive portion 24 may be irremovably fixed to the chest of the training doll 50, but is preferably removably positioned. Further, the positioning means may be one that positions and fixes the entire pressure-sensitive portion 24, but may be one that partially fixes one part or a plurality of parts.

When the positioning means such as hooks and snaps is used for positioning as described above, the compression point illustration 34 is not essential. For example, the hooks and snaps provided on the back surface of the cover 32 and the front of the chest of the training doll 50 can be used. It is also possible to configure the registration means by mutual positions. In addition, in the present embodiment, the compression point illustration 34 is a line intersecting with a cross, and is aligned with a virtual line (two-dot chain line in FIG. 4) connecting the left and right centers of the training doll 50 and the nipple. Although the pressure-sensitive portion 24 is positioned on the chest of the training doll 50, the compression point illustration 34 is not limited to the cross line.

Next, the power supply switch (not shown) of the sensor controller 14 is switched from OFF to ON, power supply to the electrodes 20a and 20b by the power supply circuit 40 is started, and the detection of the electrostatic capacitance by the detection circuit 42 is started.

Then, a trainee as a life saver (not shown) presses the chest of the training doll 50 from above the pressure-sensitive portion 24, and performs cardiopulmonary resuscitation on the training doll 50 by chest compression. Since the entire pressure-sensitive portion 24 is flexible, the pressure-sensitive portion 24 is freely deformed according to the pressing of the chest of the training doll 50 or the deformation of the trainee's hand due to the action of the pressing force. Therefore, the trainee can perform cardiopulmonary resuscitation with almost the same feeling as when pressing the chest directly without feeling any discomfort due to the pressure-sensitive section 24.

Further, when the trainee presses the chest of the training doll 50 through the pressure-sensitive section 24, the distance between the facing surfaces of the electrodes 20a and 20b in the detection unit 22 pressed by the hand of the trainee becomes small. As a result, the capacitance of the detection unit 22 increases, and the change in capacitance is detected by the detection circuit 42.

Further, the detection signal of the capacitance of each detection unit 22 detected by the detection circuit 42 is transmitted from the detection circuit 42 to the processing means (CPU 44, RAM 46, ROM 48), and various types of trainees who evaluate cardiopulmonary resuscitation are evaluated. It is used to calculate parameters. The processing means of the present embodiment uses, as the evaluation information, whether the pressing position on the chest of the training doll 50 is appropriate or not, and the ratio of the pressing depth when pressing, the pressing depth when releasing, and the pressing time. (Duty Cycle; DC), the number of compressions, the number of compressions per minute (bpm), and the ratio of chest compression time to cardiopulmonary arrest time (Chest Compression Fraction; CCF) are calculated. Below, an example of the calculation method of each parameter is shown.

More specifically, the capacitance distribution in the pressure sensing unit 24 is obtained based on the capacitance detection value of each detection unit 22 (see FIG. 5). Then, in the case where the detection unit 22 in which the amount of change in capacitance is the largest is located at the outer peripheral end of the pressure-sensitive unit 24 and the detected capacitance is less than or equal to a preset threshold value (FIG. 5A). ), it is determined that the compression position is an improper position outside the pressure sensitive portion 24. On the other hand, when the detection unit 22 in which the amount of change in electrostatic capacitance is the largest is located at a position other than the outer peripheral end of the pressure-sensitive unit 24, or when the detected electrostatic capacitance is located at the outer peripheral end and the detected electrostatic capacitance is set to a preset threshold value. When it exceeds (FIG. 5B), it is determined that the proper position is pressed near the detection unit 22. As described above, the compression position on the chest of the training doll 50 is calculated, and it is determined whether or not the compression position is appropriate. Furthermore, by calculating the compression position, the difference (distance) between the proper compression position and the actual compression position can be confirmed, so the correction amount of the compression position can be easily grasped, and efficient training can be performed. It can be performed. In the present embodiment, when it is determined that the compression position is out of the proper position, the trainee displays a character or a picture on the monitor display unit (the monitor 54 of the personal computer 52 described later) as the notification unit. Is notified to prompt the change of the compression position. However, the notification means is not limited to the monitor display means, and may be a voice or lighting of a light as long as the trainee can recognize the displacement of the compression position.

Note that FIG. 5 is an example in which the intensity (voltage) of the electrostatic capacitance detection signal transmitted from the pressure sensing unit 24 to the sensor controller 14 is shown as a distribution diagram, and the vertical scale is 1x of the electrode 20a. 5x to 5x, the horizontal axis scale indicates 1y to 5y of the electrode 20b, and the intersection of the vertical axis and horizontal axis scale indicates each detection unit 22. FIG. 5(a) shows the case where the ineffective cardiopulmonary resuscitation is performed, and 5x of the electrode 20a and 1y of the electrode 20b whose compression positions deviate from the proper positions are determined based on the intensity and distribution of the detection signal. It can be seen that the pressure is applied near the intersection and with an insufficient force such that the maximum value of the detection signal is 40 to 50 digit. On the other hand, FIG. 5(b) shows a case where effective cardiopulmonary resuscitation is performed, and from the strength of the detection signal and its distribution, the compression position is 3x of the electrode 20a and 1y of the electrode 20b. It can be seen that the pressure is close to the intersection and is compressed with a sufficiently large force such that the maximum value of the detection signal is 100 to 150 digit.

Further, the pressing (compressing) depth at the time of pressing and releasing is calculated as follows, for example. That is, after selecting the detection units 22 in which the amount of change in capacitance exceeds a preset threshold value, calculating the total sum of the capacitances of the detection units 22, the total sum of the capacitances is selected. Based on the value divided by the number of the detection units 22, the average value of the electrostatic capacitance or the pressing force detected by the selected detection unit 22 is calculated. By calculating the pressing amount from the initial state of the chest of the training doll 50 based on this average value, the pressing depth at the time of compression and at the time of release can be obtained. That is, the deformation characteristics of the training doll 50 with respect to the pressing force (including the pressing characteristics and the restoring characteristics) are obtained in advance as data such as functions and map data from the data of experiments and calculations, so that the training doll accompanying the compression and release. 50 deformations can be calculated. Note that the calculation of the indentation depth is not necessarily based on the average value of the detected electrostatic capacities, but the detection unit 22 that exceeds the threshold value is selected and the electrostatic capacity of the selected detection unit 22 is calculated. It is desirable to calculate based on the detected value, and calculation based on the average value is one example.

More specifically, when the central portion of the pressure sensitive portion 24 is pressed as shown in FIG. 6A, 16 detection portions 22 indicated by hatching in the drawing are selected, The total sum (C _a1 +C _a2 +... +C _a16 ) of the electrostatic capacitance detection values of the detection units 22 is calculated, and the calculated value is divided by 16 which is the number of the selected detection units 22. Based on the numerical value of the calculation result, the average value of the electrostatic capacitances detected by the 16 detection units 22 is calculated, and the indentation depth is calculated based on the average value of this force. On the other hand, when the end portion away from the center of the pressure sensitive portion 24 is pressed as shown in FIG. 6B, ten detection portions 22 indicated by hatching in the drawing are selected, The total sum (C _b1 +C _b2 +... +C _b10 ) of the capacitance detection values of the detection units 22 is calculated, and the calculated value is divided by 10 which is the number of the selected detection units 22. Based on the numerical value of the calculation result, the average value of the electrostatic capacitances detected by the 10 detection units 22 is obtained, and the indentation depth is calculated based on this average value. In FIG. 6, the position of compression by the palm of the trainee is simply indicated by the chain double-dashed line. In short, the indentation depth is calculated based on the average value (C _ave ) of the capacitance detection values obtained by C _ave =ΣCn/n. In the above equation, n is the number of selected detection units 22.

In this way, if the indentation depth of the chest is calculated based on the average value of the plurality of detection units 22 that have detected a change in capacitance of a predetermined value or more, for example, the size of the trainee's palm may be changed to an individual. 6A and 6B when there is a difference or when a part of the trainee's hand presses the chest at a position outside the pressure sensitive portion 24 as shown in FIG. 6B. The error in the detection result due to the difference in the pressing area in the pressure sensitive portion 24 is reduced. In the present embodiment, an example in which the indentation depth is calculated based on the arithmetic mean of the electrostatic capacitance detection values of the selected detection unit 22 has been shown. It is also possible to calculate the indentation depth based on the average.

It is also possible to obtain the pressing depth of the chest from the capacitance detection value by using the detection result of the size of the palm or the displacement of the compression position. That is, a plurality of formulas for converting the capacitance detection value into the chest indentation depth are prepared in advance according to the detection result of the compression area or the compression position, and the average value of the capacitance detection values of all the detection units 22 is prepared. It is also possible to obtain the indentation depth by correcting the difference between the detection values due to the difference in the compression area and the compression position by selecting the conversion formula according to the detection result of the compression area and the compression position together with calculating ..

Further, the pressure from the released state (from t ₁ to t _{2 in} FIG. 7) is detected by the increase in the capacitance exceeding the threshold, and the release from the compressed state is detected by the decrease in the capacitance exceeding the threshold ( By detecting (t ₂ to t _{3 in} FIG. 7), the number of times (compression number) of the cardiopulmonary resuscitation cycle (t ₁ to t _{3 in} FIG. 7) with compression and release as one unit is detected. can do.

The graph of FIG. 7 shows a model of the change in the indentation depth calculated as described above with time, and at t _1, the chest was released after chest compression until the indentation depth was minimized. T ₂ is the time of pressing the chest to the maximum depth after the chest was released at t ₁ and t ₃ was the time of pressing the chest to the minimum after the chest compression at t _2. , Respectively. In order to accurately graph such a relationship between the indentation depth and time, it is necessary that the data acquisition interval (sampling rate) does not become too long. If the data is captured and the data acquisition interval is appropriate, as shown in FIG. 8A, the waveform showing the relationship between the indentation depth and the time becomes close to the actual change in the indentation depth, while If the acquisition interval becomes too long, as shown in FIG. 8B, the waveform showing the relationship between the indentation depth and the time may be very different from the actual change in the indentation depth and may lack accuracy. Is. Such a data acquisition interval is preferably an interval of 0.1 seconds or less (data acquisition of 10 frames or more per second) in 80% or more of all detection units 22, and more preferably an interval of 0.07 seconds or less. (Data acquisition of 15 frames or more per second).

Further, based on the time (t ₃ −t ₁ ) required for one cycle from the released state to the return to the released state again, calculate the rhythm (the number of times of compressions per unit time) of the heart massage by chest compression. You can In FIG. 7, since the units of t ₁ , t ₂ , and t ₃ are milliseconds, for example, the number of compressions per minute (bpm) is bpm={1/(t ₃ −t ₁ )}. Calculated by *1000*60.

Further, the compression time (t ₂ −t ₁ ) at which the capacitance of the detection unit 22 increases is divided by the time (t ₃ −t ₁ ) required for one cycle from the released state to the compressed state to return to the released state again. Based on the calculated value, the compression time ratio (Duty Cycle) in one cycle can be obtained as a percentage. In short, the ratio of compression time in one cycle (DC), in FIG. _{7, DC = {(t 2} -t 1) / (t 3 -t 1)} can be calculated by the * 100.

Further, in the present embodiment, the chest compression ratio (CCF) is also calculated. The CCF is calculated as a percentage of the ratio of the chest compression time to the time (elapsed time) that has elapsed since the cardiopulmonary arrest of the life-saving person was confirmed. In the training, since the cardiopulmonary arrest is confirmed at the start of the training, the CCF can be obtained by calculating the ratio of the chest compression time to the elapsed time from the start of the training. In general, it is desirable to minimize interruption of chest compressions. Therefore, when the determination unit determines whether the CCF is good or bad, for example, when the calculated CCF exceeds a preset threshold value. , Can be judged as good. The chest compression time when calculating CCF includes the time from the confirmation of cardiopulmonary arrest to the start of chest compression, the use time of the automatic external defibrillator (AED), and the person performing chest compression. The time spent for lifesaving activities other than chest compressions, such as the time when he changes, is not included. In addition, as the elapsed time when calculating CCF, it is the time from the confirmation of cardiopulmonary arrest to the confirmation of cardiopulmonary resuscitation in normal life-saving activities. And the time of cardiopulmonary resuscitation may be set arbitrarily. Furthermore, it is possible to calculate the CCF after the end of the cardiopulmonary resuscitation, with the time from the time of cardiopulmonary arrest confirming cardiopulmonary arrest to the time of cardiopulmonary resuscitation confirming cardiopulmonary resuscitation as the elapsed time, and confirming cardiopulmonary arrest. It is also possible to calculate the CCF in real time during the execution of cardiopulmonary resuscitation, with the elapsed time from the time when the cardiopulmonary arrest was performed to the present time. In this way, if the real-time CCF calculated during the cardiopulmonary resuscitation is notified to the life-saving person, the life-saving person can perform the cardiopulmonary resuscitation while being aware of the CCF, and a higher-quality life-saving activity becomes possible.

Further, in the present embodiment, the compression position, the indentation depth, the rhythm, the recoil depth, and the Duty Cycle are each judged to be good or bad, and an effective chest compression time is obtained in consideration of the good or bad judgment result. The effective CCF is obtained by calculating the ratio of the effective chest compression time to the elapsed time from the confirmation of cardiopulmonary arrest. In the present embodiment, the effective CCF is defined as the effective chest compression execution time when the pass/fail judgment results are all good for each evaluation information of the indentation depth, rhythm, recoil, Duty Cycle, and compression position. The ratio of the chest compression execution time to the cardiopulmonary arrest time is calculated as a percentage. It should be noted that it is desirable to obtain an effective CCF as an effective chest compression time when the quality determination results are good for all items as in the present embodiment, but other items are good if the compression position is appropriate, for example. Even if the judgment is not reached, the effect of cardiopulmonary resuscitation can be expected to some extent, so it may be effective to calculate the CCF based on the chest compression time for which the judgment result of the compression position is good. .. In short, it is also possible to calculate the effective CCF by setting the case where the quality determination result is good in at least one of the above items as the effective chest compression time.

From the above, each parameter that is important in cardiopulmonary resuscitation can be obtained. Further, it is also possible to evaluate/score the cardiopulmonary resuscitation performed by the trainee based on the obtained parameters. Specifically, for example, an ideal numerical value (judgment value) is set in advance for each parameter, and based on the difference between the actual detection value and the set judgment value, the pressing depth and release at the time of compression are released. The indentation depth at time, the ratio of compression time (Duty Cycle), and the number of compressions per minute (bpm) are evaluated, and cardiopulmonary resuscitation is comprehensively evaluated from the evaluation results of the respective parameters. As the judgment value of each parameter, for example, a numerical value proposed in the guidelines of CPR can be adopted, and specifically, the pressing depth when pressing is 5 cm, the pressing depth when releasing is 0 cm, The compression time ratio is 50%, and the number of compressions per minute is 110 times. Moreover, although it explained focusing on one cycle of cardiopulmonary resuscitation, since normal cardiopulmonary resuscitation is continuously carried out over a certain period of time, for example, by obtaining each of the above parameters for each cycle, Cardiopulmonary resuscitation can also be evaluated based on the average of all cycles.

The evaluation/scoring of the cardiopulmonary resuscitation as described above is performed, for example, by connecting the personal computer 52 to the sensor controller 14 and displaying the evaluation result and cautions on the monitor 54 of the personal computer 52 or reading it by the speaker of the personal computer 52. The trainee is informed by the action. In this way, by letting the personal computer 52 notify the evaluation result and the like, the trainee can be prompted to further improve the cardiopulmonary resuscitation. It should be noted that here, although an example in which the evaluation result is notified after completion of the cardiopulmonary resuscitation is shown, for example, by sequentially informing the evaluation result during the execution of the cardiopulmonary resuscitation, the correction of the cardiopulmonary resuscitation in progress is promoted. Can be improved. As is clear from the above description, in the present embodiment, the notification means for notifying the trainee of the evaluation information such as the displacement of the compression position and the evaluation result of the cardiopulmonary resuscitation is realized by the personal computer 52 connected to the sensor controller 14. It is configured.

More specifically, as shown in FIG. 9, the evaluation information can be displayed on the monitor 54 of the personal computer 52 as a notification means during the execution of cardiopulmonary resuscitation. That is, FIG. 9 shows a display example of the monitor 54 of the personal computer 52, and in the detection value map display area 56 provided at the center of the screen, the pushing depth based on the detection value of the electrostatic capacitance is mapped. And it is displayed in real time. Displaying in a map here means that the detected value of the electrostatic capacitance or the calculated value based on the detected value of the electrostatic capacitance is displayed on the plane by dividing the contour line and the color, as shown in the detected value map display area 56 of FIG. Is to be displayed as the distribution of. Therefore, in the detected value map display area 56, colors are displayed in different colors according to the depth of indentation, and the position and depth of compression can be intuitively recognized from the color distribution. In particular, as shown in FIG. 9, if it is displayed in an overlapping manner with the human body model illustration 58, the distribution of the compression position and the indentation depth in the chest can be easily understood. Therefore, whether the compression position or depth is appropriate is determined. In addition, it is easy to understand how to correct it if it is inappropriate. It should be noted that the display of the detection value map display area 56 may be allowed to rotate. For example, by rotating the display according to the orientation of the life-saving person, the distribution of the compression position and the pushing depth can be more intuitive. Can be grasped.

In the present embodiment, in the detection value map display area 56, the indentation depth based on the detection value of the capacitance is displayed in a map as a distribution on the plane by the contour lines and the different colors. In the detection value map display area 56, the distribution of the detected value of the electrostatic capacitance or the value calculated based on the detected value of the electrostatic capacitance (pushing depth or the like) on the plane of the pressure sensitive portion 24 is displayed. Good. For example, the detected values of the capacitance are displayed at a plurality of points dispersedly set on the plane corresponding to the pressure-sensitive section 24, and the plane corresponding to the pressure-sensitive section 24 is divided into meshes. The detected value may be displayed on the screen. However, rather than displaying the detected value as a numerical value on a plane, it is preferable to use one that can be easily grasped, such as contour lines and different colors. Note that displaying a value calculated based on the detected value of the electrostatic capacity or the detected value of the electrostatic capacity on a map means that the color or a specific numerical value according to the detected value of the electrostatic capacity or the calculated value based on it, It means that a symbol or the like is displayed on a portion on a plane corresponding to the detection position on the pressure sensitive portion 24.

In this way, when the detection value map display area 56 is displayed in real time, the display of the detection value map display area 56 is within 0.15 seconds for the operation of cardiopulmonary resuscitation (for example, chest compression and release). It is desirable to follow the update with a delay of, and more preferably, the display delay is within 0.1 seconds. Accordingly, a person who views the detection value map display area 56 can recognize the display of the detection value map display area 56 with respect to the operation of the cardiopulmonary resuscitation without a noticeable time delay, and can recognize it as a real-time information display without any discomfort. The detection value map display area 56 does not necessarily have to be a real-time display corresponding to the progress of cardiopulmonary resuscitation, and may be displayed with a predetermined time delay, and may be displayed as a still image and a predetermined value. The image may be automatically updated every time, or the image may be arbitrarily updated or selected manually.

Furthermore, the frame rate of the map display in the detection value map display area 56 is preferably 4 fps (frames per second) or more, and more preferably 10 fps or more. As a result, as schematically shown in FIG. 10, the display of the detection value map display area 56 accurately follows the operation of cardiopulmonary resuscitation. That is, comparing the case of FIG. 10A in which the frame rate is 5 fps and the case of FIG. 10B in which the frame rate is 3 fps, the compression force in FIG. Since the second frame in (a) is not displayed, it is not possible to accurately grasp the change in compression force. Therefore, the number of frames (frame rate) per unit time of the detection value map display area 56 is preferably large in order to accurately grasp the transition of the operation of cardiopulmonary resuscitation. 10A and 10B show the case where the same change in compression force is displayed, and the second frame and the fourth frame in FIG. 10A are not displayed in FIG. 10B due to the difference in frame rate. It is shown that.

Further, in the monitor display of FIG. 9, an advice display area 60 for four items is provided in the left middle row. That is, each item (evaluation information) of the pressing depth, the number of compressions per minute (rhythm), the release of the chest (recoil), and the compression time ratio (Duty Cycle; DC) is set by the personal computer 52 as the determination means. The quality determination is performed based on the determined determination value, and in the present embodiment, the advice display area 60 displays ◯ for the determination of good and x for the determination of bad. In FIG. 9, the three items of rhythm, recoil, and DC are determined to be good, and the indentation depth is determined to be insufficient. Therefore, by increasing the indentation depth, improvement of cardiopulmonary resuscitation is improved. It is easily understood that is possible. In the present embodiment, a personal computer 52 is configured as a determination unit that performs a quality determination based on a reference value set in advance for the evaluation information and a determination result notification unit that notifies the quality determination result. .. For each item, in addition to or instead of the result of the quality judgment, the numerical value of the measurement result may be displayed.

Further, an auxiliary display area 62 for displaying the quality of the compression position and the number of times of compression is provided on the upper right side of the monitor display. In the auxiliary display area 62, based on the pass/fail judgment result of the compression position, ◯ for the judgment of good and X for the judgment of bad are displayed, and the number of chest compressions from the start of training to the present is displayed. ing. It should be noted that an advice unit is provided for notifying a policy to be changed to be good for an item that is determined to be bad based on the pass/fail judgment results displayed in the advice display area 60 and the auxiliary display area 62. Alternatively, for example, "Please push deeper" may be displayed or pronounced.

Furthermore, a CCF display area 64 is provided below the auxiliary display area 62. The CCF display area is an area for displaying the CCF calculated as a percentage of the ratio of the execution time of chest compressions to the cardiopulmonary arrest time of the person to be rescued (elapsed time from confirmation of cardiopulmonary arrest). In addition to the general CCF, the effective CCF is also displayed. In the CCF display area 64, in addition to or instead of the display of FIG. 9, the time when the quality determination result is determined to be good for at least one of the above five pieces of evaluation information is the chest compression execution time, It is also possible to display what is calculated as a percentage of the ratio of the chest compression execution time to the cardiopulmonary arrest time.

In addition, a graph display area 66 is provided in the lower part of the monitor display, in which a change in the indentation depth over time during training is displayed as a graph. Further, above the advice display area 60, there is provided a graph enlarged display area 68 in which only a specific short time in the graph display area 66 is extracted and enlarged. To the left of the graph display area 66, a start switch unit 70 that starts display by selecting with a point device such as a mouse, and a pass/fail judgment result of FIG. 11 described later by selecting with a point device such as a mouse An evaluation switch unit 72 for switching to the screen is provided.

On the other hand, FIG. 11 shows an example of the pass/fail judgment result displayed on the monitor 54 of the personal computer 52 after the completion of the cardiopulmonary resuscitation training according to FIG. 9 (after the end of the compression on the pressure sensitive portion 24). There is. As described above, the pass/fail judgment result is based on the preset judgment value, the pressing depth at the time of compression, the pressing depth at the time of release, the compression time ratio (Duty Cycle), the number of compressions per minute (rhythm ) Are each evaluated, and in FIG. 11, the evaluation results are displayed by evaluating five items in which the compression position is further deviated from the target position.

More specifically, each of the above five items is scored with a maximum of 100 points based on the judgment value, the score for each item is displayed, and the balance of the score of each item can be easily grasped. A pentagonal radar chart showing the balance of the scores of the five items is displayed. Further, the average of the scores of the five items is shown as the total score, and the quality judgment result of the total score is displayed in letters below the total score. In addition, the time when the training was performed (training time), the time when the cardiopulmonary resuscitation was actually performed from the start to the end of the training (compression time), and all of the above five items exceeded the judgment value, and effective cardiopulmonary resuscitation was performed. The time at which the surgery was performed (effective time) is displayed, and the compression time and the effective time are displayed as a percentage of the training time. In the present embodiment, the personal computer 52 is configured to execute the quality determination based on the determination value set for the evaluation information, and the quality determination result is displayed on the monitor 54 of the personal computer 52. The determination means and the evaluation result display means are both configured by the personal computer 52.

In the specific example of FIG. 11, as shown in the graph of FIG. 9, since the indentation depth did not reach the determination value of 5 cm over the entire training, the score of the depth item was The score is 0, the effective time is extremely short, the total score is as low as 77, and the result of the judgment of "poor" is shown in the quality judgment. In this way, by objectively judging the quality of the training result and promptly giving it to the trainee, the trainee can have an awareness of the goals and points for improvement of the training, and the progress of the efficient training. Is planned.

However, the result of FIG. 11 is an example in which the trainee is not informed of the monitor information (FIG. 9) of the personal computer 52 that is displayed in real time during the execution of cardiopulmonary resuscitation, and the trainee who is training the monitor information concerned. Can be improved during training. That is, in FIG. 9, since the advice display area 60 is symbolized to indicate that the depth is insufficient, the trainee looks at the monitor 54 of the personal computer 52 or the assistant displays the contents displayed on the monitor 54. By giving information on the advice display to the trainee at any time by transmitting, for example, the trainee can make an improvement such as intentionally deepening the pushing depth according to the advice display. In this way, the advice means of the present embodiment is configured by displaying the policy to be changed symbolically on the advice display area 60 and the auxiliary display area 62 of the monitor 54 of the personal computer 52.

The evaluation method of the training result as described above is merely an example, and other evaluation methods can be adopted. Specifically, in FIG. 11, the comprehensive evaluation is performed based on the average score of the respective items, but, for example, when there is one or a predetermined number of items that are out of the allowable range from the judgment value, The overall evaluation may be rejected regardless of the score of the item. Further, for example, the comprehensive evaluation can be performed based on the average of the deviation amount (deviation) from the reference (judgment value) in each item.

Further, the method of displaying the training result is not particularly limited. That is, in addition to indicating the total evaluation by scores and characters as in the above embodiment, the quality of the total evaluation is indicated by characters or symbols (for example, ○ and ×), or by the achievement rate (%) for the judgment value of the total evaluation. You may

According to the cardiopulmonary resuscitation assisting device 10 having the structure according to the present embodiment, the compression position in the chest, the number of times of chest compression, the number of chest compressions per unit time (rhythm), and during compression and release. Since the indentation depth of the chest and the ratio of the chest compression time can be detected respectively, it is possible to assist the cardiopulmonary resuscitation to be performed more appropriately based on the detection results.

Further, in the cardiopulmonary resuscitation assisting device 10, since the pressure-sensitive portion 24 for detecting compression is formed of an elastomer and can be flexibly deformed, it is easily deformed along the unevenness of the chest surface and slips off the chest. In addition to being difficult, the error in the detection result due to the gap between the pressure sensitive portion 24 and the chest is reduced. In addition, the trainee can reduce the discomfort at the time of compression due to the intervention of the pressure-sensitive portion 24, and thus the trainee can perform the training with substantially the same sensation as that when the cardiopulmonary resuscitation assisting device 10 is not used. In addition, contact with the pressure-sensitive portion 24 during compression does not cause pain or injury.

Furthermore, since the area of the pressure-sensitive portion 24 is equal to or larger than the average area of the chest compression portion of the human palm, it is possible to effectively detect the change in capacitance due to the chest being pressed by the palm. Even if the compression position of the palm is displaced within a range that does not deviate from an appropriate chest compression region, each parameter of cardiopulmonary resuscitation can be effectively detected. In particular, by adopting the flexible pressure-sensitive portion 24 formed of the elastomer, the pressure-sensitive portion 24 is deformed along the surface of the chest even if the area of the pressure-sensitive portion 24 is sufficiently increased, so that a wide range can be obtained. It is possible to effectively detect the change in capacitance over the entire range. Moreover, the pressure-sensitive portion 24 that constitutes the capacitance type sensor easily changes the area and the detection accuracy by changing the size of the dielectric layer 16 and the electrodes 20a and 20b, the number of the electrodes 20a and 20b, and the like. be able to.

Further, the noise guard electrode 30 connected to the terminal of the reference potential (ground terminal 38) is superposed on the electrode 20b via the insulator layer 28, and the pressure-sensitive portion 24 is used for the human body of a life-saving person or for training. The noise guard electrode 30 and the insulating layer 28 are arranged between the electrode 20b and the human body or the chest of the training doll 50 in a state of being overlapped with the chest of the doll 50. Therefore, it is possible to prevent a capacitor from being formed between the electrode 20b and the human body or the chest of the training doll 50, and it is possible to avoid an error in the detection result due to the capacitance of the capacitor. Can be obtained accurately.

Further, since the sensor main body 12 including the pressure sensitive portion 24 is detachably connected to the sensor controller 14 having the power supply device and the measuring means, for example, damage or deterioration due to repeated compression occurs. The resulting pressure sensitive portion 24 can be removed from the sensor controller 14 and replaced if desired. Further, if the sensor body 12 is replaced after use, it is possible to keep the sensor body 12 in contact with the human body clean. Needless to say, the sensor controller 14 removed from the sensor body 12 may be replaced when the sensor controller 14 fails.

Although the embodiment of the present invention has been described in detail above, the present invention is not limited to the specific description. For example, the number of electrodes 20a and 20b is an example, and can be changed appropriately. In particular, by increasing the number of electrodes 20a and 20b, more detailed detection and wider range detection can be realized. Further, the electrodes 20a and 20b are not necessarily limited to the structure where they intersect with each other at a plurality of locations, and may have a structure where they intersect at only one location, for example. It may be arranged such that they are opposed to each other in a one-to-one manner with 16 in between, and the detection portion is composed of the opposed portions of the first and second electrodes. In short, when the detectors are provided at a plurality of locations, the detectors can be configured by independent electrodes. It should be noted that the detection unit does not have to be provided in a plurality of locations in the pressure sensitive unit 24, and may be provided in only one location in the pressure sensitive unit 24.

Further, the noise guard electrode 30 and the insulator layer 28 are not essential. Further, the noise guard electrode 30 and the insulator layer 28 may be disposed so as to be overlapped with each other on the elastomer sheet 18a side, whereby a capacitor is formed between the life saver's hand and the electrode 20a, and a detection result is obtained. It is possible to prevent an error from occurring. Further, the insulating layer disposed between the noise guard electrode 30 and the first and second electrodes 20a and 20b does not necessarily have to be specially provided as in the above-described embodiment, and for example, the elastomer sheet 18a may be used. , 18b can also be used as the insulator layer. Further, the noise guard electrode 30 and the insulator layer 28 are separated from the sensor body 12, and the noise guard electrode 30 and the insulator layer 28 are superposed on the outer surface of the cover 32, thereby The insulator layer 28 may be disposed between the first and second electrodes 20a and 20b and the human body.

Furthermore, in the above-described embodiment, the ratio of the compression time in one cycle [(t ₂ −t ₁ )/(t ₃ −t) is used as a measurement value of the ratio between the time of pressing the chest and the time of returning without pressing the chest. ₁ )] has been adopted, but the value is not limited thereto, and it is also possible to adopt, for example, the value of [(t ₂ −t ₁ )/(t ₃ −t ₂ )]. Furthermore, it is possible to eliminate noise and stabilize external display results by adopting an average value of two or more times as each measured value or by passing an appropriate frequency pass filter. Is.

Further, in the present embodiment, it is not essential that the sensor main body 12 including the pressure sensitive portion 24 is detachably connected to the sensor controller 14, and the sensor main body 12 is connected substantially inseparably. Unintentional separation between the sensor controller 14 and the sensor controller 14 can be avoided, and reliability can be improved.

Furthermore, it is possible to equip the sensor controller 14 with a wireless transmission device as a wireless transmission means and wirelessly receive the transmission signal of the measurement result wirelessly transmitted by the wireless reception means on the personal computer 52 side. In that case, it is desirable that the power supply circuit 40 includes a storage battery. Further, the sensor controller 14 is equipped only with a function of wirelessly transmitting a capacitance detection signal, while the personal computer 52 uses the capacitance detection signal wirelessly received to obtain a desired compression force or chest pressing depth. It is also possible to configure an arithmetic means for performing arithmetic processing for obtaining a measurement value such as, and by doing so, it is possible to reduce the size of the component integrated with the sensor body 12 and further facilitate the handling. ..

Specifically, a cardiopulmonary resuscitation assisting device 74 equipped with wireless transmitting/receiving means is shown in FIG. 12 as a second embodiment of the present invention. In the following description, members and parts that are substantially the same as those in the first embodiment will be denoted by the same reference numerals in the drawings, and description thereof will be omitted.

In the cardiopulmonary resuscitation assisting device 74, the wirings 26a and 26b connected to the first and second electrodes 20a and 20b of the pressure sensing unit 24 are connected to the wireless transmitting device 76 via the sensor controller 14 by wire. It has a structure. In short, the cardiopulmonary resuscitation assisting device 74 of the present embodiment includes an arithmetic processing unit (sensor controller 14) that converts the detection signal of the electrostatic capacitance received from the detection unit 22 of the pressure sensing unit 24 into a transmission signal by wireless, and generation. Wireless transmission means (wireless transmission device 76) for wirelessly transmitting the transmitted signal.

Further, the transmission signal wirelessly transmitted from the wireless transmission device 76 is such that the transmission signal transmitted from the wireless transmission device 76 is received by a portable terminal such as a personal computer 52 or a tablet 80 having a wireless reception means. ing. Further, the personal computer 52 and the tablet 80 are configured to calculate evaluation information by calculation processing based on the received signal and display it on the monitors 54 and 82, and also have a function as a notification means. Note that the portable terminal may use both the personal computer 52 and the tablet 80 at the same time. In that case, the tablet 80 may share some of the functions of the personal computer 52 described in the first embodiment. The tablet 80 may execute the same process as the personal computer 52 in parallel. Further, the personal computer 52 may be provided with another wireless transmission means, and the evaluation information processed by the personal computer 52 may be wirelessly transmitted from the personal computer 52 to the tablet 80 and displayed. On the other hand, it is also possible to adopt the tablet 80 instead of the personal computer 52, and in this case, the tablet 80 has the function of the personal computer 52 described in the first embodiment. Further, as the portable terminal, a smartphone or the like can be adopted in addition to the illustrated personal computer 52 and tablet 80. Furthermore, the wireless receiving means is preferably a portable terminal having excellent portability, but may be, for example, a stationary terminal (desktop or the like).

According to the cardiopulmonary resuscitation assisting device 74 having the structure according to the present embodiment, the detection signal of the pressure sensing unit 24 is wirelessly transmitted to the terminals such as the personal computer 52 and the tablet 80. Wiring for connecting the terminals becomes unnecessary, and the maneuverability of the terminals is improved. In particular, when used while being transported by a stretcher, an ambulance, a helicopter, etc., the terminal for displaying the evaluation information is wirelessly connected to the sensing section such as the pressure sensing section 24 and the sensor controller 14, so that It is easy to use because the connection wiring does not hinder the transportation. Moreover, the wiring that connects the terminals does not come off due to vibration during movement, and the reliability can be improved.

Note that the sensor controller 14 may perform arithmetic processing for obtaining evaluation information from the detection signal and wirelessly transmit the evaluation information as a transmission signal. Further, in order to transfer wirelessly the effective detection result acquired at a sufficient sampling rate to a portable terminal or the like without causing a delay to be experienced, the wireless data communication speed is 50 Mbps or more. Is desirable. Therefore, for example, wifi or the like capable of higher speed communication than Bluetooth (registered trademark) is preferably adopted.

Further, the mounting state of the cardiopulmonary resuscitation assisting device 10 on the training doll 50 shown in FIG. 4 is merely an example, and the size of the entire cardiopulmonary resuscitation assisting device 10 and the pressure-sensitive portion 24 are the training dolls 50. The area and the like covering the chest can be changed appropriately. That is, as shown in FIG. 13, a relatively large cardiopulmonary resuscitation assisting device 10 including a pressure-sensitive portion 24 having a larger area than that of the above-described embodiment can be employed, and a compression position or the like can be set in a wider range. Can be detected. Further, in the present invention, since the pressure-sensitive portion 24 has a flexible structure, even if a relatively large pressure-sensitive portion 24 is adopted, the pressure-sensitive portion 24 does not affect the surface of the training doll 50 or the hand of the rescuer. It can be easily deformed along the unevenness of the surface and can be effectively detected, and the discomfort caused by the pressure-sensitive portion 24 can be reduced.

In the above-described embodiment, the case where the cardiopulmonary resuscitation assisting device 10 according to the present invention is used for the training of cardiopulmonary resuscitation is described. However, the cardiopulmonary resuscitation assisting device 10 is not limited to the training, and the life-saving of the rescuer It can also be used in treatment. In this case, it is desirable to notify the rescuer so that more appropriate cardiopulmonary resuscitation can be performed by notifying the evaluation result in real time during the execution of cardiopulmonary resuscitation.

10, 74: CPR assist device, 14: Sensor controller (power supply device, measuring means, processing means), 16: Dielectric layer, 20a: Electrode (first electrode), 20b: Electrode (second electrode) , 24: pressure sensitive part, 28: insulator layer, 30: noise guard electrode, 34: compression point illustration (positioning means), 40: power supply circuit (power supply device), 42: detection circuit (detection means), 44: Central processing unit (processing means), 46: RAM (processing means), 48: ROM (processing means), 52: Personal computer (portable terminal, wireless reception means, notification means, monitor display means, determination means, determination result notification Means, advice means, evaluation result display means), 76: wireless transmission device (wireless transmission means), 80: tablet (portable terminal, wireless reception means, notification means, monitor display means, determination means, determination result notification means, advice Means, evaluation result display means)

Claims (21)

A cardiopulmonary resuscitation assisting device for assisting cardiopulmonary resuscitation with chest compression,
A pressure sensitive portion is provided that is superimposed on the chest, and the pressure sensitive portion directly attaches a flexible first electrode formed of a conductive elastomer to one surface of a flexible dielectric layer formed of an elastomer. In addition to being laminated , it has a laminated structure in which a flexible second electrode formed of a conductive elastomer is directly laminated on the other surface of the dielectric layer , and the dielectric layer is compressible and A flat sheet , wherein the pressure-sensitive portion has the first electrode based on the compressive deformation of the dielectric due to the opposing portion of the first electrode and the second electrode sandwiching the dielectric layer . While a detection unit that detects a change in electrostatic capacitance due to a change in the facing distance between the electrode and the second electrode is provided at a plurality of locations,
A power supply device that applies a measurement voltage is connected to the first electrode and the second electrode, and the capacitance of the detection unit is detected on the first electrode and the second electrode. Is connected to the detection means, and based on the capacitance value of the detection portion obtained by the detection means, the number of chest compressions, the number of chest compressions per unit time, and the chest pressing depth during chest compressions. And a chest pushing depth at the time of chest release, and a processing means for calculating at least one evaluation information of a ratio of the time of pressing the chest and the time of returning without pressing the chest, and the processing means. However, the cardiopulmonary resuscitation assisting device is characterized in that the chest compression position is calculated as the evaluation information based on the detection value of the electrostatic capacitance of the detection unit obtained by the detection means. The first electrode and the second electrode are arranged so as to intersect at a plurality of points, and the first electrode and the second electrode are opposed to each other across the dielectric layer at each of the points of intersection. The cardiopulmonary resuscitation assisting apparatus according to claim 1 , wherein the detecting unit is configured. The cardiopulmonary system according to claim 1 or 2 , wherein the processing unit calculates the ratio of the chest compression time to the elapsed time of cardiopulmonary arrest based on the value of the capacitance of the detection unit obtained by the detection unit as the evaluation information. Resuscitation assistive device. The processing unit selects the detection unit in which a change in electrostatic capacitance equal to or more than a threshold value is detected, and based on the value of the electrostatic capacitance of the selected detection unit, the chest pressing depth and the chest release during chest compression. cardiopulmonary resuscitation aid according to any one of claims 1 to 3 for calculating at least one of the chest indentation depth when. Cardiopulmonary resuscitation aid according to any one of claim 1 to 4, the area of the pressure sensing is equal to or greater than the average area of the chest compression portion in the palm of a person. Cardiopulmonary resuscitation aid according to any one of claim 1 to 5, wherein the pressure sensing is detachably connected to said power supply and said detecting means. At least one of the second electrode and the first electrode, cardiopulmonary resuscitation aid according to any one of claim 1 to 6, comprising a noise guard electrode grounded. Said first and said at least one of the second electrode is an electrode, cardiopulmonary resuscitation according to any one of claim 1 to 7, noise guard electrode grounded are superimposed through an insulating layer Auxiliary device. The cardiopulmonary resuscitation assisting device according to any one of claims 1 to 9 , further comprising: a positioning unit that allows the pressure-sensitive unit to be positioned on the chest. Cardiopulmonary resuscitation aid according to any one of claim 1 to 9, informing means for outputting the evaluation information is a calculation result of said processing means. The cardiopulmonary resuscitation assisting device according to claim 10 , wherein the notifying unit is a monitor displaying unit that displays a deviation from an appropriate position in the chest compression position. The cardiopulmonary resuscitation assistance according to claim 10 or 11 , wherein the notifying unit displays the detected value of the electrostatic capacitance in the pressure sensing unit or a value calculated based on the detected value of the electrostatic capacitance in a map form. apparatus. A wireless transmission unit that wirelessly transmits, as a transmission signal, a detection value detected by the detection unit or the evaluation information obtained by the processing unit from the detection value, a wireless reception unit that receives the transmission signal, and a reception by the wireless reception unit cardiopulmonary resuscitation aid according to any one of claim 1 to 12, based on the signal and a notifying means for informing the evaluation information. The cardiopulmonary resuscitation assisting device according to claim 13 , wherein the wireless receiving unit is configured by a portable terminal. Together and a quality determination unit as a reference set reference value for said evaluation information, any one of claim 1 to 14, informing means for informing the quality determination result by the determination means is provided The cardiopulmonary resuscitation assisting device according to. 16. The cardiopulmonary resuscitation assisting device according to claim 15 , further comprising: an advice unit for notifying a policy to be changed in order to determine whether the result is good or bad based on the result of the quality determination by the determination unit. The cardiopulmonary resuscitation assisting device according to claim 15 or 16 , wherein the chest compression time for which the quality determination result by the determination means based on at least one of the evaluation information is good is calculated as a ratio to the elapsed time of cardiopulmonary arrest. The cardiopulmonary resuscitation assisting device according to claim 17 , wherein the chest compression time when all the quality judgment results by the judging means based on the evaluation information are good is calculated as a ratio to the elapsed time of cardiopulmonary arrest. Cardiopulmonary resuscitation aid according to any one of claim 1 to 18, positioning means for positioning said pressure sensing on the chest is provided. Cardiopulmonary resuscitation aid according to any one of claim 1 to 19, wherein the pressure sensing is used is worn on the human body model for training. The evaluation information is provided with determination means for determining acceptability based on the determination value set for the evaluation information, and after completion of compression on the pressure-sensitive portion, an evaluation result display means for displaying a determination result of acceptance by the determination means is provided. 21. The cardiopulmonary resuscitation assisting device according to claim 20 .