CN219700738U - Aviation medical air bag constant pressure device - Google Patents

Abstract

The utility model discloses an aviation medical air bag constant pressure device, which comprises an trachea cannula, a pressure stabilizing component and a subglottal suction tube, wherein the trachea cannula comprises a catheter main body and an air bag, the air bag is arranged at one end of the catheter main body, the air bag is matched with the pressure stabilizing component, the end, close to the air bag, of the catheter main body is provided with a first opening, and the catheter main body is provided with a second opening positioned in the air bag; the pressure stabilizing assembly comprises a pressure sensor, an air pump, a deflation valve and a controller, the air pump and the deflation valve are matched with the air bag, the pressure sensor is used for sensing the pressure inside the air bag, and the controller controls the air pump to inflate the air bag or controls the deflation valve to deflate from the air bag according to the feedback of the pressure sensor. The utility model is used for aviation medical rescue, has stable structure, long service life and easy processing, can realize continuous monitoring and automatic and accurate control on the pressure of the air bag, lightens the damage of the mucous membrane of the air passage, improves the comfort level of injured patients and improves the efficiency and the capability of aviation rescue.

Description

Aviation medical air bag constant pressure device

Technical Field

The utility model belongs to the technical field of auxiliary medical instruments, and particularly relates to an aviation medical air bag constant pressure device.

Background

Mechanical ventilation by using an endotracheal tube is widely used for clinical rescue and treatment of various respiratory failures and provides anesthesia and postoperative respiratory support, and is an important measure for rescuing the life of a patient in a common and effective manner. Mechanical ventilation, however, carries a significant risk of respiratory support to the patient and thus causes complications that cannot be ignored. Airway management is particularly important, including the management of the inflation and deflation of the bladders, the pressure of the bladders, and the like.

The front part of the trachea cannula inserted into the trachea is provided with an air bag, and the air bag has the functions of sealing the airway, preventing air leakage and preventing aspiration. The gasbag is inflated and is stopped up the trachea after the inflation, makes on the one hand phlegm can not flow in lung downwards, on the other hand prevents when patient exhales, and the gas of exhaling flows out through the gap between trachea cannula and the human trachea through the trachea cannula, leads to unable accurate measurement patient's expiration. The ideal pressure in the air sac is required to block the air leakage between the tracheal catheter and the tracheal wall, and the blood circulation of the tracheal mucosa is not influenced. Thus, rational balloon management is of great importance in clinical care.

In the aviation medical rescue process, the air pressure in the cabin can be regulated through the air pressure regulating system in the aircraft taking off and flying to landing process, the air pressure in the air bag can be influenced by the air pressure change in the cabin, however, the existing air bag pressure control technology belongs to constant pressure control, and the air bag pressure is not regulated according to the situation.

The utility model application publication No. US20160067461A1 discloses a controlled burst elastic medical balloon with axially constant radial pressure, the high pressure balloon using shallow helical grooves compressed in the balloon wall under axially constant radial pressure. Filaments of high tensile strength material with low compliance are wrapped in the embossed grooves to prevent internal pressure within the balloon from sagging the grooves. The balloons are designed to longitudinally separate in the event of excessive pressure.

The utility model application publication No. US20170014563A1 discloses a medical balloon for a balloon pump. The medical balloon has a first end and a second end and a port at one end thereof for engaging a catheter for receiving inflation fluid into the balloon. The balloon has one or more outer walls that define a taper of at least a portion of the balloon length when the balloon is inflated at substantially standard operating pressures. The cone has two or more continuous cone portions, each cone portion having a different, substantially constant taper angle. When inflated, the bladder is substantially asymmetric at a midpoint between the first and second ends.

By analyzing the prior art, the pressure of the medical air bag is maintained mainly by means of improvement on the wall of the air bag, however, the improvement leads the air bag to easily cause structural deformation in the process of repeated expansion-contraction-expansion, the suitability of the air bag with a trachea is reduced due to structural instability, the elasticity of the wall of the air bag is reduced easily, and the service life of the air bag is shortened.

Disclosure of Invention

The utility model aims to provide an aviation medical air bag constant pressure device which has a stable structure and long service life and is easy to process, the continuous monitoring and automatic accurate control of the air bag pressure in the whole time phase from the take-off and the flight to the landing of an airplane are realized, the damage of air passage mucous membrane is reduced, the incidence rate of VAP (ventilator-associated pneumonia) is reduced, and the aviation rescue efficiency and the aviation rescue capability are improved.

The technical scheme adopted by the utility model for achieving the purpose is as follows:

the aviation medical air bag constant pressure device comprises an endotracheal tube, a pressure stabilizing component and a subglottal suction tube, wherein one end of the endotracheal tube is connected with a breathing machine, and one end of the subglottal suction tube is connected with a negative pressure suction piece;

the tracheal cannula comprises a catheter main body and an air bag, wherein the air bag is arranged at one end of the catheter main body, the air bag is matched with the pressure stabilizing component, the end, close to the air bag, of the catheter main body is provided with a first opening, and the catheter main body is provided with a second opening positioned in the air bag;

the pressure stabilizing assembly comprises a pressure sensor, an air pump, a deflation valve and a controller, the air pump and the deflation valve are matched with the air bag, the pressure sensor is used for sensing the pressure inside the air bag, and the controller controls the air pump to inflate the air bag or controls the deflation valve to deflate from the air bag according to the feedback of the pressure sensor.

Furthermore, the catheter main body and the air bag are both processed by adopting polyvinyl chloride materials.

By adopting the technical scheme, when a patient is subjected to medical rescue, the trachea cannula can be inserted into the trachea, the air bag and the subglottal suction tube are placed in place, and the trachea cannula is inflated through the breathing machine, so that the patient is convenient to breathe in an auxiliary mode. The gasbag blocks up the trachea after inflation, blocks the gas leakage between endotracheal tube and the tracheal wall, helps accurate measurement to hinder the expiration volume of suffering, still can prevent that the phlegm from flowing into lung downwards, and the subglottal suction tube is connected to negative pressure suction device, attracts subglottal secretion, prevents that the retentate from inhaling bronchus and lung by mistake on the gasbag.

The pump body is communicated with one end, far away from the first opening, of the catheter body, the pump body receives an inflation instruction of the controller, the inside of the catheter body can be inflated, and the inflated gas can enter the inside of the air bag through the second opening, so that the effect of pressurizing the inside of the air bag is achieved. Correspondingly, the air release valve receives an air release instruction of the controller, can communicate the inside of the air bag with the outside, and discharges partial air in the air bag, so that the effect of reducing the pressure in the air bag is achieved. So, in the in-process of aviation medical treatment rescue, because of aircraft in-flight cabin internal pressure's change and lead to gasbag internal pressure change, in aircraft take off, fly to the full-time phase of landing, pressure sensor feeds back the inside pressure change of gasbag that senses to the controller, the operation of controller accessible control air pump and bleed valve is adjusted, in order to reach the invariable effect of gasbag internal air pressure, guarantee the laminating degree of gasbag intubate and the tracheal of disease in the rescue process, alleviate the air flue mucosa damage, reduce VAP (ventilator-related pneumonia) incidence, improve aviation rescue efficiency and ability.

Among the above-mentioned technical scheme, the simple structure of gasbag, if change in shape takes place at the in-process of gassing, will be realized by the holistic elastic deformation of gasbag wall, the excessive condition of local deformation can not take place, can guarantee overall structure's stability, prevent gas leakage to extension gasbag's life.

According to one embodiment of the utility model, the endotracheal tube is provided with an exhaust tube which is located on the tube body on the side of the balloon remote from the opening one, the exhaust tube being fitted with a deflation valve.

Therefore, when the pressure in the air bag needs to be reduced, part of gas in the air bag can be released through the exhaust pipe and the air release valve, so that the stability of the air pressure in the air bag is promoted, and the smoothness of the injured breathing is ensured.

According to one embodiment of the utility model, the air release valve comprises an air release base, a connecting cover body and a movable plug body; one end of the air release base is matched with the exhaust pipe, the connecting cover body is matched with the other end of the air release base, a first cavity is arranged between the connecting cover body and the air release base, and an exhaust channel is arranged in the air release base and used for communicating the exhaust pipe with the first cavity; the side wall of the connecting cover body is provided with a first vent hole; the movable plug body is arranged in the connecting cover body and moves back and forth to open or close the exhaust channel.

Further, the air release base is in threaded connection or clamping connection with the exhaust pipe.

Therefore, through the reciprocating movement of the movable plug body and the movable fit of the deflation base, the deflation can be realized when the inside of the air bag, the exhaust pipe and the exhaust channel are communicated with the first cavity, so that the adjustment of the internal pressure of the air bag can be realized; when the exhaust channel is disconnected with the first cavity, the tightness of the air bag can be ensured, and the internal air pressure can be kept.

The arrangement of the structures such as the exhaust channel and the first cavity provides an exhaust buffer space, which is favorable for reducing the flow speed of air flow, so that on one hand, the stability of the tracheal cannula, especially the catheter main body, can be improved, on the other hand, the impact force of the air flow on the injured trachea during exhaust can be reduced, the noise in the air flow emission process is reduced, and a quiet and good rescue environment is maintained.

According to one embodiment of the utility model, the movable plug body comprises a sealing element and a connecting rod, wherein the sealing element is fixedly connected, the sealing element is arranged close to the air release base, the connecting rod is fixedly connected with one end, far away from the air release base, of the sealing element, one side, far away from the sealing element, of the connecting rod is sleeved in the connecting cover body, and the connecting rod can drive the sealing element to be close to or far away from the air release base so as to seal or open an air release channel.

Further, one end of the connecting rod far away from the sealing element is connected with a micro motor, and the micro motor is operated by a controller to drive the connecting rod and the sealing element to move back and forth.

The sealing piece comprises a sealing cover body, a sealing sheet and a connecting sleeve body, wherein the sealing cover body comprises a circular cover body and an annular flange arranged at the edge of the cover body, the cover body can be abutted with the tail end of the deflation base, and the annular flange is attached to the edge of the deflation base. The sealing round platform which is movably matched with the exhaust channel is arranged on the inner side of the sealing cover body, and the sealing round platform is arranged on the cover body and can extend into or extend out of the exhaust channel to open and close the exhaust channel.

Specifically, sealed lid and gassing base butt, exhaust passage are stretched into its inside sealed round platform shutoff, and the lateral wall of gassing base is then held in annular flange to improve the leakproofness, prevent gas leakage. The connecting rod drives the sealing piece to be far away from the air release base, the sealing round platform stretches out from the air release channel, and the side wall of the air release base is separated from the annular flange, so that the air release channel is communicated with the first cavity.

Further, the periphery of the sealing round table is provided with an annular first fold part, the top surface of the air release base is provided with a second fold part, and the first fold part is used for being matched with the second fold part.

Therefore, the sealing performance of the sealing cover body to the air release base can be improved through the embedding of the first fold part and the second fold part, and air leakage is prevented when air release is not needed.

The sealing cover body is provided with second ventilation holes which are opposite to the exhaust channel, the sealing sheets are attached to the outer surface of the sealing cover body and correspond to the second ventilation holes one by one, the sealing sheets are rotationally connected with the connecting sleeve body through connecting rods, the connecting sleeve body is sleeved on the connecting rod, and the connecting sleeve body is fixedly connected with the inner wall of the connecting cover body. In the process that the sealing cover body moves back and forth along with the connecting rod, the sealing piece slides back and forth along the radial direction on the outer surface of the sealing cover body, and the second ventilation hole can be closed or opened.

Therefore, the communication area between the exhaust channel and the first cavity is adjustable due to the arrangement of the second vent holes, when the air pressure in the air bag is small in variation range and a small amount of air is required to be discharged, the connecting rod can be used for driving the sealing cover to move for a short distance, the annular flange of the sealing cover is not separated from the air discharge base, but the sealing sheet can be caused to slide on the outer surface of the sealing cover and release the second vent holes, so that the air bag is communicated with the first cavity; when a large amount of air is required to be discharged, the connecting rod can be utilized to drive the sealing cover body to move for a long distance, so that the sealing cover body is completely separated from the air discharging base and the air discharging channel is released, and the inside of the air bag is communicated with the first cavity.

Therefore, the moving distance of the movable plug body can be regulated and controlled according to the pressure change condition in the air bag, so that on one hand, the energy consumption can be saved, on the other hand, the discharged air flow is buffered for multiple times, and the air flow speed is reduced. Specifically, when a small amount of air is discharged, the sealing round table is still partially embedded in the air discharge channel, the sealing cover body is not completely separated from the air discharge base, a small buffer space is formed between the sealing cover body and the air discharge base, the air flow speed and the air flow direction are adjusted in the space, the air flow is divided into a plurality of air flows through a plurality of second ventilation holes and is discharged into the first cavity, the plurality of air flows are converged again in the first cavity, and the air flows are discharged through the first ventilation holes under the guiding action of the inner wall of the connecting cover body. In the process, a plurality of air flows are impacted and mixed with each other and mixed with the originally static air in the first cavity, so that the effects of energy dissipation and speed reduction are realized, and the noise in the air flow discharging process can be reduced.

According to one embodiment of the utility model, the outer surface of the sealing cover body is provided with a sliding groove, one end of the sliding groove is connected with the second ventilation hole, the other end of the sliding groove extends outwards along the radial direction of the sealing cover body, the sealing piece is provided with a plug, the plug is connected with the sliding groove in a sliding mode, and when the sealing cover body is abutted with the deflation base, the plug is embedded in the second ventilation hole.

Therefore, the moving direction of the sealing piece can be limited through the sliding groove, the sealing piece is prevented from shifting, and the sealing effect is ensured. The plug is arranged on the sealing piece, so that the accuracy of the moving direction can be improved, and the plugging effect on the second ventilation hole can be ensured.

According to one embodiment of the utility model, the second opening comprises a first air outlet and a second air inlet which are arranged along the length direction of the catheter main body, wherein the second air inlet is arranged close to the first opening, and a one-way choke valve is arranged between the first air outlet and the second air inlet and is used for blocking air flow from the first air outlet to the second air inlet.

Therefore, when in inspiration, the air flow in the catheter main body enters the air bag from the first air outlet, then enters the catheter main body from the air bag through the second air inlet, and is discharged into a wounded air pipe from the opening I, so that the flow of the air in the air bag is caused, part of the air is prevented from being detained in the air bag for a long time, and the oxygen content of the air in the air bag is ensured. During exhalation, the air flow exhausted from the patient's lungs enters the air bag through the opening one on the catheter main body, and the one-way choke valve is opened, and the main body part of the air flow is guided by the catheter main body and discharged outwards through the air release valve, so that CO in the air bag is retained ₂ The content is reduced, thereby ensuring the quality of each breath of the wounded patient.

Compared with the prior art, the utility model has the following beneficial effects:

1. the pressure stabilizing component monitors the pressure change in the air bag in real time, and the controller controls the operation of the air pump and the air release valve to achieve the effect of constant air pressure in the air bag, so that the fitting degree of the air bag intubation tube and the air pipe of a patient in the rescue process can be ensured in the full-time phase of taking off and flying to landing of an aircraft, the damage of the air passage mucosa is reduced, the incidence rate of VAP (ventilator-associated pneumonia) is reduced, and the aviation rescue efficiency and the aviation rescue capability are improved; the air bag is simple in structure, and can not generate the situation of local excessive deformation in the process of inflation and deflation, so that the stability of the whole structure can be ensured, air leakage can be prevented, and the service life of the air bag can be prolonged;

2. in the air release valve, the sealing piece is movably matched with the second air vent hole on the sealing cover body, so that the communication area between the air exhaust channel and the first cavity body can be adjusted, the moving distance of the movable plug body can be adjusted according to the air release amount in the air bag, and the energy consumption is saved;

3. the sealing cover body is movably matched with the deflation base, so that the communication between the exhaust channel and the first cavity is realized, enough buffer space is arranged for air flow, and the air flow is mixed again after being divided, thereby being beneficial to reducing the flow speed of the air flow, changing the flow direction of the air flow, reducing the impact force of the air flow, improving the stability of the tracheal intubation and reducing noise;

4. the second opening in the air bag comprises a first air outlet and a second air inlet, and is matched with a one-way choke valve, so that the air in the air bag can be driven to flow during inspiration, the oxygen content in the air flow is improved, the main part of the air flow can be ensured to be discharged through a deflation valve on the catheter main body during expiration, and the CO in the reserved air bag is reduced ₂ The content is as follows.

Therefore, the aviation medical air bag constant pressure device has a stable structure and a long service life, can reduce the damage of airway mucous membrane, reduce the incidence rate of VAP (ventilator-associated pneumonia), and improve the aviation rescue efficiency and capacity.

Drawings

Fig. 1 is a schematic structural view of an aviation medical balloon constant pressure device according to embodiment 1 of the present utility model;

fig. 2 is a schematic diagram of a voltage stabilizing assembly according to embodiment 1 of the present utility model;

FIG. 3 is a schematic view showing the structure of a purge valve according to embodiment 1 of the present utility model;

FIG. 4 is a schematic view of the structure of the deflation base shown in FIG. 3;

FIG. 5 is a schematic view of the seal cap of FIG. 3;

FIG. 6 is a schematic view showing the structure of a purge valve according to embodiment 2 of the present utility model;

FIG. 7 is an enlarged partial schematic view of portion B of FIG. 6;

FIG. 8 is a schematic view of a portion of the bleed valve of FIG. 6 at another angle;

FIG. 9 is a schematic diagram of the rectifying substrate of FIG. 6;

FIG. 10 is a schematic view showing the flow direction of air flow during inhalation of the constant pressure device for aviation medical balloon according to embodiment 3 of the present utility model;

FIG. 11 is a schematic view showing the flow direction of the air flow during exhalation of the aeronautical medical balloon constant pressure device according to embodiment 3 of the present utility model;

fig. 12 is a schematic view showing a modified structure of an air bag of an aeronautical medical air bag constant pressure apparatus according to embodiment 3 of the present utility model.

Reference numerals: a catheter body 10; an opening one 11; an opening II 12; opening three 13; an exhaust pipe 14; an air bag 15; a purge valve 16; a subglottic suction tube 17; a deflation base 21; an exhaust passage 22; a connection cover 23; a first cavity 24; a first vent hole 25; a movable plug 26; a seal 27; a connecting rod 28; a sealing cover 30; a cover body 31; an annular flange 32; a sealing round table 33; a first fold 34; a second fold portion 35; a second vent hole 40; a sealing sheet 41; a connecting sleeve 42; a connection lever 43; a chute 44; a plug 45; a rectifying member 50; a rectifying base 51; a flow divider 511; a first air outlet 61; a second air inlet 62; a one-way choke valve 63; an auxiliary balloon 64.

Detailed Description

The technical scheme of the utility model is further described in detail below with reference to the detailed description and the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Example 1

Fig. 1 to 5 schematically show an aviation medical balloon constant pressure device according to an embodiment of the present utility model. As shown in the figure, the device comprises an endotracheal tube, a pressure stabilizing assembly and a subglottal suction tube 17, wherein one end of the endotracheal tube is connected with a respirator, and one end of the subglottal suction tube 17 is connected with a negative pressure suction piece.

The tracheal cannula comprises a catheter body 10 and a balloon 15, both of which are processed from polyvinyl chloride material. The balloon 15 is arranged at one end of the catheter main body 10, the balloon 15 is matched with the pressure stabilizing component, the end, close to the balloon 15, of the catheter main body 10 is provided with a first opening 11, and the catheter main body 10 is provided with a second opening 12 positioned inside the balloon 15.

The pressure stabilizing assembly comprises a pressure sensor, an air pump, a deflation valve 16 and a controller, wherein the air pump and the deflation valve 16 are matched with the air bag 15, the pressure sensor is used for sensing the pressure inside the air bag 15, and the controller is further connected with the power supply module. The working principle of the voltage stabilizing assembly is shown in fig. 2, specifically, the controller controls the air pump to inflate the air bag 15 or controls the air release valve 16 to release air from the air bag 15 according to the feedback of the pressure sensor. The pressure sensor senses the pressure in the air bag 15, and the air pump is used for inflating and deflating the air bag 15, so that the pressure in the air bag 15 is maintained at 25-30 cm H2O. The pressure sensor senses the pressure in the air bag 15, and when the pressure is lower than the lower limit of the normal value, the air pump automatically inflates; when the pressure is higher than the upper limit of the normal value, the air release valve 16 is used for releasing air, so that the pressure of the air bag 15 is automatically adjusted.

When the patient is subjected to medical rescue, the trachea cannula can be inserted into the trachea, the air bag 15 and the subglottal suction tube 17 are placed in place, and the trachea cannula is inflated through the breathing machine, so that the breathing of the patient is facilitated to be assisted. The air sac 15 blocks the air pipe after expanding, blocks air leakage between the air pipe conduit and the air pipe wall, is favorable for accurately measuring the exhale amount of the wounded patient, can prevent phlegm from flowing downwards into the lung, and can prevent the retentate on the air sac 15 from being inhaled into the bronchus and the lung by mistake because the subglottic suction pipe 17 is connected to the negative pressure suction device to suck the subglottic secretion.

The pump body is communicated with one end, far away from the first opening 11, of the catheter main body 10, and receives an inflation instruction of the controller, so that the interior of the catheter main body 10 can be inflated, and the inflated gas can enter the interior of the air bag 15 through the second opening 12, so that the effect of pressurizing the interior of the air bag 15 is achieved. Correspondingly, the deflation valve 16 receives the deflation instruction of the controller, can communicate the interior of the air bag 15 with the outside, and can discharge part of air in the air bag 15, so as to achieve the effect of depressurizing the interior of the air bag 15. So, in the medical rescue of aviation in-process, because of aircraft flight in-process cabin internal pressure's change and lead to gasbag 15 internal pressure to change, in the aircraft take off, fly to the full-time phase of landing, pressure sensor feeds back the inside pressure variation of gasbag 15 that senses to the controller, the operation of controller accessible control air pump and bleed valve 16 is adjusted, in order to reach the invariable effect of gasbag 15 internal air pressure, guarantee the laminating degree of gasbag 15 intubate and the tracheal of disease in-process of rescue, alleviate the air flue mucosa damage, reduce VAP breathing machine correlation pneumonia incidence, improve aviation rescue efficiency and ability.

The tracheal cannula is provided with an opening III 13, the opening III 13 is connected with an exhaust pipe 14, the opening III 13 is positioned on the catheter main body 10, and the exhaust pipe 14 is positioned on one side of the balloon 15 far away from the opening I11.

The air release valve 16 comprises an air release base 21, a connecting cover body 23 and a movable plug body 26; one end of the air release base 21 is in threaded connection with the exhaust pipe 14, the connecting cover body 23 is in threaded connection with the other end of the air release base 21, and a first cavity 24 is arranged between the connecting cover body 23 and the air release base 21. An exhaust passage 22 is provided in the interior of the air release base 21 for communicating the exhaust duct 14 with a first chamber 24. A first vent hole 25 is provided in a side wall of the connection housing 23 for exhausting air outward. The movable plug 26 is disposed inside the connection housing 23, and the movable plug 26 moves back and forth to open or close the exhaust passage 22.

Through the reciprocating movement of the movable plug body 26 and the movable fit of the deflation base 21, deflation can be realized when the interior of the air bag 15, the exhaust pipe 14 and the exhaust channel 22 are communicated with the first cavity 24, so that the adjustment of the internal pressure of the air bag 15 can be realized; when the exhaust passage 22 is disconnected from the first chamber 24, the tightness of the air bag 15 can be ensured, and the internal air pressure can be maintained.

The movable plug body 26 comprises a sealing element 27 and a connecting rod 28 which are fixedly connected, the sealing element 27 is arranged close to the air release base 21, the connecting rod 28 is fixedly connected with one end, far away from the air release base 21, of the sealing element 27, one side, far away from the sealing element 27, of the connecting rod 28 is sleeved in the connecting cover body 23, and the connecting rod 28 can drive the sealing element 27 to be close to or far away from the air release base 21 so as to seal or open the air release channel 22.

The end of the connecting rod 28 far away from the sealing element 27 is connected with a micro motor, and the micro motor is operated by a controller to drive the connecting rod 28 and the sealing element 27 to reciprocate.

The sealing member 27 comprises a sealing cover body 30, the sealing cover body 30 comprises a circular cover body 31 and an annular flange 32 arranged at the edge of the cover body 31, the cover body 31 can be abutted with the tail end of the deflation base 21, and the annular flange 32 is attached to the edge of the deflation base 21. The sealing circular table 33 movably matched with the exhaust channel 22 is arranged on the inner side of the sealing cover body 30, the sealing circular table 33 is arranged on the cover body 31, the sealing circular table 33 can extend into or extend out of the exhaust channel 22 to open and close the exhaust channel 22, and an annular fold part is arranged on the periphery of the sealing circular table 33 and is used for being matched with the side wall of the air release base 21.

Specifically, the sealing cover 30 is abutted against the air release base 21, the air release passage 22 is blocked by the sealing circular table 33 extending into the air release base 21, and the side wall of the air release base 21 is clamped in the annular flange 32, so that the sealing performance is improved, and air leakage is prevented. The connecting rod 28 drives the sealing member 27 away from the degassing base 21, the sealing land 33 protrudes from the degassing channel 22, and the side wall of the degassing base 21 is also free from the annular flange 32, so that the degassing channel communicates with the first cavity 24.

Further, an annular first fold portion 34 is provided on the outer periphery of the seal land 33, and a second fold portion 35 is provided on the top surface of the deflation base 21, and the first fold portion 34 and the second fold portion 35 are capable of being fitted to each other. By fitting the first and second bellows portions 34 and 35 in this manner, the sealing performance of the seal cover 30 with respect to the air release base 21 can be improved, and air leakage can be prevented from occurring when air release is not required.

Example 2

Fig. 6 to 9 schematically show an aviation medical balloon constant pressure device according to another embodiment of the present utility model, which is different from example 1 in that:

the first vent hole 25 is located above the side wall of the connection housing 23.

The seal 27 includes a seal cover 30, a seal piece 41, and a connection sleeve 42.

The sealing cover body 30 is provided with second ventilation holes 40, the second ventilation holes 40 are arranged on the circular cover body 31 and are opposite to the exhaust channel 22, sealing sheets 41 are attached to the outer surface of the sealing cover body 30 and are in one-to-one correspondence with the second ventilation holes 40, the sealing sheets 41 are rotatably connected with the connecting sleeve body 42 through connecting small rods 43, the connecting sleeve body 42 is sleeved on the connecting rod 28, and the connecting sleeve body 42 is fixedly connected with the inner wall of the connecting cover body 23. In the process that the sealing cover 30 moves back and forth along with the connecting rod 28, the sealing piece 41 slides back and forth along the radial direction on the outer surface of the sealing cover 30, and can close or open the second ventilation hole 40.

The second ventilation holes 40 are arranged to enable the communication area between the exhaust channel 22 and the first cavity 24 to be adjustable, when the air pressure variation amplitude in the air bag 15 is small and a small amount of air release is needed, the connecting rod 28 can be used for driving the sealing cover 30 to move for a short distance, the annular flange 32 of the sealing cover 30 is not separated from the air release base 21, but the sealing piece 41 can be caused to slide on the outer surface of the sealing cover 30 and release the second ventilation holes 40, so that the air bag 15 is communicated with the first cavity 24; when a large amount of air is required, the connecting rod 28 can be used for driving the sealing cover 30 to move a little longer distance, so that the sealing cover 30 is completely separated from the air release base 21 and the air release channel 22 is released, and the interior of the air bag 15 is communicated with the first cavity 24.

Therefore, the moving distance of the movable plug body 26 can be regulated and controlled according to the pressure change condition in the air bag 15, so that on one hand, the energy consumption can be saved, and on the other hand, the discharged air flow is buffered for multiple times, and the air flow speed is reduced. Specifically, during a small amount of air release, the sealing round table 33 is still partially embedded in the air release channel 22, the sealing cover 30 and the air release base 21 are not completely separated, a small buffer space is formed between the sealing cover 30 and the air release base, the air flow speed and the air flow direction are adjusted in the space, the air flow is divided into a plurality of air flows through the plurality of second ventilation holes 40 and is discharged into the first cavity 24, the plurality of air flows are recombined in the first cavity 24, and the air flows are discharged through the first ventilation holes 25 under the guiding action of the inner wall of the connecting cover 23. In this process, the multiple streams impinge upon each other, mix and mix with the otherwise stationary gas within the first chamber 24, thereby providing energy dissipation and velocity reduction effects and reducing noise during the discharge of the streams.

The outer surface of the sealing cover 30 is provided with a chute 44, one end of the chute 44 is connected with the second ventilation hole 40, the other end of the chute 44 extends outwards along the radial direction of the sealing cover 30, the sealing piece 41 is provided with a plug 45, the plug 45 is in sliding connection with the chute 44, and when the sealing cover 30 is abutted with the deflation base 21, the plug 45 is embedded in the second ventilation hole 40.

In addition, the first vent hole 25 is provided with a detachable rectifying member 50 including a rectifying base 51 for rectifying the air flow discharged from the rectifying base, so that the discharged air flow can flow in a certain direction, further consuming the energy of the air flow and reducing the flow rate.

A plurality of tubular flow dividing members 511 are arranged in parallel inside the rectifying body 51, and the radial direction of the flow dividing members 511 is arranged along the flow direction of the air flow; the cross section of the flow divider 511 may be provided in the shape of a circle, a hexagon or other polygons.

Therefore, the airflow in the first cavity 24 enters the rectifying substrate 51, is divided again by the plurality of parallel flow dividing members 511, flows in the tubular flow dividing members 511, and the direction of the airflow tends to be consistent and the airflow energy is consumed by the limitation of the inner wall of the flow dividing members 511, so that the impact range of the airflow is limited, the airflow speed is reduced, and the stability of the tracheal intubation is improved.

Example 3

Fig. 10 to 12 schematically show an aviation medical balloon constant pressure device according to still another embodiment of the present utility model, which is different from example 1 in that:

the second opening 12 of the catheter body 10 in the balloon 15 includes a first air outlet 61 and a second air inlet 62 disposed along the length direction of the catheter body 10, the second air inlet 62 is disposed near the first opening 11, and a unidirectional choke valve 63 is disposed in the catheter body 10 between the first air outlet 61 and the second air inlet 62. In use, gas within the catheter body 10 is discharged into the interior of the balloon 15 via the first gas outlet 61, causing it to expand and occlude the trachea. The one-way choke valve 63 blocks the catheter body 10 when the patient inhales, the gas in the balloon 15 enters the catheter body 10 through the second gas inlet 62 and enters the trachea of the patient through the opening one 11, and the outward flowing gas flow opens the one-way choke valve 63 when the patient exhales and is discharged to the outside of the trachea cannula through the catheter body 10, the opening three 13 and the air release valve 16.

The direction of the gas flow during inhalation and exhalation of the patient is shown in fig. 10 and 11, wherebyWhen in inspiration, the air flow in the catheter main body 10 enters the air bag 15 from the first air outlet 61 to cause the air in the air bag 15 to flow, and then enters the catheter main body 10 through the second air inlet 62, so that the oxygen content of the air in the air bag 15 can be ensured, and part of the air is prevented from being detained in the air bag 15 for a long time; during exhalation, the air flow discharged from the injured lung enters the air bag 15 through the catheter main body 10, and the one-way choke valve 63 is opened, and the main part of the air flow is guided through the catheter main body 10 and discharged outwards through the air release valve 16, so that CO in the air bag 15 is retained ₂ The content is reduced, thereby ensuring the quality of each breath of the wounded patient. In addition, in the process of breathing one, the volume change of the air bag 15 is not large, the stability of the air pressure in the air bag 15 can be ensured through the fine adjustment of the pressure stabilizing component, the air bag 15 can be prevented from falling off, the air leakage is avoided, the influence on the blood circulation of the tracheal mucosa is avoided, the damage of the airway mucosa is reduced, and the occurrence rate of VAP is reduced.

An auxiliary balloon 64 may be provided at the distal end of the balloon 15, and the catheter main body 10 may be provided with the second opening 12 in the auxiliary balloon 64. In this way, the auxiliary balloon 64 is inflated by the air flow in the catheter main body 10, and the auxiliary balloon 64 can be used for assisting the balloon 15 to block the injured air pipe, so that even if the balloon 15 is loosened due to the air pressure change, a certain adjustment time can be provided for the balloon 15 through the arrangement of the auxiliary balloon 64, and the auxiliary balloon 64 can be used for maintaining the blocking of the air pipe in the process of adjusting the pressure of the balloon 15, so that the exhalation amount measurement error caused by the deformation of the balloon 15 is avoided. Further, the second opening inside the auxiliary air bag 64 may be configured such that the first air outlet 61, the second air inlet 62 and the unidirectional choke valve 63 cooperate.

Conventional operations in the operation steps of the present utility model are well known to those skilled in the art, and are not described herein.

While the foregoing embodiments have been described in detail in connection with the embodiments of the utility model, it should be understood that the foregoing embodiments are merely illustrative of the utility model and are not intended to limit the utility model, and any modifications, additions, substitutions and the like made within the principles of the utility model are intended to be included within the scope of the utility model.

Claims (5)

1. An aviation medical air bag constant pressure device comprises an endotracheal tube, a pressure stabilizing component and a subglottal suction tube (17); it is characterized in that the method comprises the steps of,

the trachea cannula comprises a catheter main body (10) and an air bag (15), the air bag (15) is arranged at one end of the catheter main body (10), the air bag (15) is matched with the pressure stabilizing component, an opening I (11) is arranged at the tail end, close to the air bag (15), of the catheter main body (10), and an opening II (12) positioned in the air bag (15) is arranged on the catheter main body (10);

the pressure stabilizing assembly comprises a pressure sensor, an air pump, a deflation valve (16) and a controller, wherein the air pump and the deflation valve (16) are matched with the air bag (15), the pressure sensor is used for sensing the pressure inside the air bag (15), and the controller controls the air pump to inflate the air bag (15) or controls the deflation valve (16) to deflate from the air bag (15) according to the feedback of the pressure sensor;

the tracheal cannula is provided with an exhaust pipe (14), the exhaust pipe (14) is positioned on the catheter main body (10) and is positioned on one side of the air bag (15) away from the opening I (11), and the exhaust pipe (14) is matched with the air release valve (16);

the air release valve (16) comprises an air release base (21) and a movable plug body (26); an exhaust channel (22) is arranged in the air release base (21), and the exhaust channel (22) is communicated with the exhaust pipe (14); the movable plug body (26) moves back and forth to open or close the exhaust passage (22).

2. The aviation medical balloon constant pressure device according to claim 1, wherein,

the air release valve (16) comprises a connecting cover body (23); one end of the air release base (21) is matched with the exhaust pipe (14), the connecting cover body (23) is matched with the other end of the air release base (21), a first cavity (24) is arranged between the connecting cover body (23) and the air release base (21), and the exhaust channel (22) is used for communicating the exhaust pipe (14) with the first cavity (24); a first vent hole (25) is formed in the side wall of the connecting cover body (23); the movable plug body (26) is arranged in the connecting cover body (23).

3. The aviation medical balloon constant pressure device according to claim 2, wherein,

the movable plug body (26) comprises a sealing element (27) and a connecting rod (28) which are fixedly connected, the connecting rod (28) is sleeved in the connecting cover body (23), and the connecting rod (28) can drive the sealing element (27) to be close to or far away from the air release base (21) so as to seal or open the air release channel (22);

the sealing piece (27) comprises a sealing cover body (30), a sealing sheet (41) and a connecting sleeve body (42), and a sealing round table (33) which is movably matched with the exhaust channel (22) is arranged on one side of the sealing cover body (30);

the sealing cover body (30) is provided with second vent holes (40), the second vent holes (40) are opposite to the exhaust channel (22), the sealing sheets (41) are arranged in one-to-one correspondence with the second vent holes (40), and the sealing sheets (41) are rotationally connected with the connecting sleeve body (42) through connecting small rods (43);

the connecting sleeve body (42) is sleeved on the connecting rod (28), and the connecting sleeve body (42) is fixedly connected with the inner wall of the connecting cover body (23).

4. The aviation medical balloon constant pressure device according to claim 3, wherein,

the outer surface of the sealing cover body (30) is provided with a sliding groove (44), one end of the sliding groove (44) is connected with the second ventilation hole (40), the other end of the sliding groove (44) extends outwards along the radial direction of the sealing cover body (30), the sealing piece (41) is provided with a plug (45), the plug (45) is in sliding connection with the sliding groove (44), and when the sealing cover body (30) is in butt joint with the deflation base (21), the plug (45) is embedded into the second ventilation hole (40).

5. The aviation medical balloon constant pressure device according to claim 1, wherein,

the second opening (12) comprises a first air outlet (61) and a second air inlet (62) which are arranged along the length direction of the catheter main body (10), a one-way choke valve (63) is arranged between the first air outlet (61) and the second air inlet (62), and the one-way choke valve (63) is used for blocking air flow from the first air outlet (61) to the second air inlet (62).