CN111202508A

CN111202508A - Invasive pressure sensor

Info

Publication number: CN111202508A
Application number: CN202010044550.9A
Authority: CN
Inventors: 王五星; 于敬军; 王博森
Original assignee: Shenzhen Antmed Co ltd
Current assignee: Shenzhen Antmed Co ltd
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-05-29

Abstract

The invention discloses an invasive pressure sensor which comprises a filling device, wherein the filling device is used for being communicated with a liquid medicine container and is provided with a filtering membrane for filtering liquid medicine in the filling device; the pressure detection device is provided with a liquid storage cavity, and the liquid storage cavity is communicated with the filling device; the blood recovery device is provided with a liquid return cavity which is communicated with the liquid storage cavity; and the sampling three-way valve is provided with a first interface, a second interface and a third interface, the first interface is communicated with the liquid return cavity, and the second interface is communicated with the blood sampling device. According to the technical scheme, after the invasive pressure sensor performs blood sampling on the monitored person, the physical discomfort of the monitored person is avoided.

Description

Invasive pressure sensor

Technical Field

The invention relates to the technical field of medical instruments, in particular to an invasive pressure sensor.

Background

With the rapid development of science and technology and medicine, human beings have abundant means and measures for treating their own diseases and prolonging their lives, and especially in the treatment process of critical patients (such as shock patients, heart surgery, organ transplantation, etc.) in recent years, continuous dynamic detection of several pressure parameters in human bodies, such as arterial pressure, venous pressure, etc., is required, so invasive pressure sensors are widely used clinically. In order to reduce the number of punctures to the monitored person and reduce the pain of the monitored person. The invasive pressure sensor which can detect the pressure of the monitored person and sample the blood of the monitored person appears on the market. However, in the invasive pressure sensor in the related art, after the blood sampling is performed on the monitored person, a part of blood may remain in the invasive pressure sensor, which may cause discomfort to the monitored person.

The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.

Disclosure of Invention

The invention mainly aims to provide an invasive pressure sensor, aiming at avoiding the discomfort of the monitored person after the invasive pressure sensor performs blood sampling on the monitored person.

In order to achieve the above object, the present invention provides an invasive pressure sensor comprising:

the filling device is used for being communicated with the liquid medicine container and is provided with a filtering membrane for filtering liquid medicine in the filling device;

the pressure detection device is provided with a liquid storage cavity, and the liquid storage cavity is communicated with the filling device;

the blood recovery device is provided with a liquid return cavity which is communicated with the liquid storage cavity; and

the sampling three-way valve is provided with a first interface, a second interface and a third interface, the first interface is communicated with the liquid return cavity, and the second interface is communicated with the blood sampling device.

In an embodiment of the present invention, the perfusion device includes a dropping funnel main body and a puncture outfit, the dropping funnel main body is formed with a first liquid passing channel, the first liquid passing channel is communicated with the liquid storage cavity, the filtering membrane is disposed in the first liquid passing channel, the puncture outfit is connected to the dropping funnel main body and has a puncture end communicated with the first liquid passing channel, and the puncture end is inserted into the liquid medicine container so as to communicate the first liquid passing channel with the liquid medicine container.

In an embodiment of the present invention, the perfusion apparatus further includes a filter membrane fixing seat, the filter membrane fixing seat is disposed in the first liquid passing channel, the filter membrane fixing seat is provided with a filter membrane installation groove, and the filter membrane is embedded in the filter membrane installation groove.

In an embodiment of the present invention, the pressure detection device includes a chip mounting shell and a chip, the chip mounting shell is provided with the liquid storage cavity, and the chip is disposed in the chip mounting shell and partially inserted into the liquid storage cavity.

In an embodiment of the invention, the chip mounting shell includes an upper chip shell and a lower chip shell, the upper chip shell is provided with the liquid storage cavity, and the lower chip shell is connected to the upper chip shell and is matched with the upper chip shell to clamp and fix the chip;

or, the chip comprises a chip body and a probe, the chip body is connected to the chip mounting shell, the probe is connected to the chip body, and one end, far away from the chip body, of the probe is inserted into the liquid storage cavity.

In an embodiment of the present invention, the blood recovery device includes a liquid return cylinder and a piston, the liquid return cylinder is provided with the liquid return cavity, the piston is movably disposed in the liquid return cavity, and the piston moves relative to the liquid return cylinder to make the blood in the liquid return cavity flow out through the third interface of the sampling three-way valve.

In an embodiment of the present invention, the blood recovery device further includes a push rod, the push rod is connected to the piston, and an external force acts on the push rod to drive the piston to move relative to the liquid return cylinder.

In an embodiment of the invention, the invasive pressure sensor further includes a check valve, and the check valve is communicated with the liquid storage cavity and the liquid return cavity to communicate the flow direction of the liquid medicine flowing from the liquid storage cavity to the liquid return cavity.

In an embodiment of the present invention, the invasive pressure sensor further includes a flow rate adjusting device, the flow rate adjusting device is connected to the filling device and the liquid storage cavity, and the flow rate adjusting device is used for adjusting the flow rate of the liquid medicine flowing from the filling device to the liquid storage cavity.

In an embodiment of the present invention, the flow rate adjusting device includes an adjusting housing and a roller, the adjusting housing is internally provided with a second fluid passage, the second fluid passage is communicated with the filling device and the fluid storage chamber, the roller is movably disposed in the adjusting housing and partially embedded in the second fluid passage, the roller moves relative to the adjusting housing, and the distance between the roller and the inner wall of the second fluid passage can be adjusted to adjust the size of the fluid.

When the invasive pressure sensor in the technical scheme is used, the perfusion device is communicated with the liquid medicine container, and the third interface of the sampling three-way valve is communicated with the blood vessel of a monitored person. So that the liquid medicine can flow into the liquid storage cavity of the pressure detection device from the perfusion device, and the blood can flow into the liquid return cavity of the blood recovery device from the sampling three-way valve. Because of returning the liquid chamber to communicate in the stock solution chamber for the liquid medicine in the stock solution intracavity can flow into and return the liquid intracavity, makes the stock solution chamber in the pressure measurement device and the blood vessel intercommunication of monitored person this moment. The pressure change condition detected by the pressure detection device to the liquid medicine in the liquid storage cavity is equal to the pressure change condition of blood in the blood vessel, so that continuous dynamic detection of physiological parameters such as arterial pressure, venous pressure and the like of the monitored person by the pressure detection device is realized. Because be equipped with filtration membrane in the perfusion device, can filter the liquid medicine through this filtration membrane, avoid impurity to lead to leading to causing the influence to monitored person's health along with the liquid medicine enters into monitored person's blood vessel to the security that has invasive pressure sensor used has been improved.

When the invasive pressure sensor is used for blood sampling, the second interface and the third interface of the sampling three-way valve are communicated, and the blood sampling device communicated with the second interface can sample the blood of the detected person through the sampling three-way valve. Therefore, the skin of the monitored person does not need to be punctured additionally, and the skin damage to the monitored person in the blood sampling process is reduced. After the blood sampling is finished, the blood recovery device conveys the blood remained in the sampling three-way valve back to the blood vessel of the monitored person by using the liquid medicine in the liquid return cavity. Therefore, the phenomenon that the monitored person loses excessive blood after blood sampling is avoided, and the discomfort of the monitored person is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of an invasive pressure sensor according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic diagram of the perfusion apparatus of the invasive pressure sensor of FIG. 1;

FIG. 4 is a schematic diagram of the pressure sensing device of the invasive pressure sensor of FIG. 1;

FIG. 5 is a schematic diagram of the blood collection set of the invasive pressure sensor of FIG. 1;

fig. 6 is a schematic view of the flow regulating device of the invasive pressure sensor of fig. 1.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Perfusion device	23	Line body
11	Filter membrane	30	Blood recovery device
				12	Dropping funnel main body	30a	Liquid return cavity
12a	The first liquid passing channel	31	Liquid return cylinder
				13	Puncture outfit	32	Piston
131	Puncture tip	33	Push rod
				14	Filter membrane fixing seat	34	Rubber sleeve
14a	Filter membrane mounting groove	40	Sampling three-way valve
				15	Protective cap	41	First interface
20	Pressure detection device	42	Second interface
				20a	Liquid storage cavity	43	Third interface
21	Chip mounting case	50	One-way valve
				211	Chip upper shell	60	Flow rate regulating device
212	Chip lower casing	61	Adjusting shell
				22	Chip and method for manufacturing the same	61a	The second liquid passing channel
221	Chip body	62	Roller wheel
				222	Probe head

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides an invasive pressure sensor.

Referring to fig. 1, fig. 2, fig. 4 and fig. 5, in an embodiment of the present invention, the invasive pressure sensor includes a perfusion device 10, a pressure detecting device 20, a blood recovering device 30, a sampling three-way valve 40; the filling device 10 is used for communicating with a liquid medicine container, and the filling device 10 is provided with a filtering membrane 11 for filtering the liquid medicine in the filling device 10; the pressure detection device 20 is provided with a liquid storage cavity 20a, and the liquid storage cavity 20a is communicated with the perfusion device 10; the blood recovery device 30 is provided with a liquid return cavity 30a, and the liquid return cavity 30a is communicated with the liquid storage cavity 20 a; the sampling three-way valve 40 has a first port 41, a second port 42 and a third port 43, the first port 41 is connected to the fluid returning chamber 30a, the second port 42 is used for connecting with the blood sampling device, and the third port 43 is used for connecting with the blood vessel of the monitored person.

In one embodiment of the present invention, the filling device 10 is mainly used to communicate with a medical fluid container so as to enable the medical fluid in the medical fluid container to enter the invasive pressure sensor. So regard liquid medicine as pressure test liquid for can accomplish simultaneously at the in-process of infusing and monitor the measuring of the physiological parameter of person's blood vessel, thereby reduced medical personnel's intensity of labour. The filtering membrane 11 is mainly used for filtering the liquid medicine flowing through the perfusion device 10, so as to prevent impurities from entering the blood vessel of the monitored person along with the liquid medicine. Wherein the porosity of the filtration membrane 11 is 40% to 50%, the pore diameter is 5 μm to 10 μm, and the thickness is 100 to 200 μm. As can be understood, the arrangement ensures that the filtering membrane 11 has larger excess liquid amount and improves the filtering efficiency; meanwhile, the overlarge filtering pore diameter is avoided, so that particles with smaller particles can be filtered out, and the filtering precision is improved; and the setting of thickness scope makes filter membrane 11 have certain intensity, so can prolong its life, also is convenient for filter membrane 11's installation simultaneously. The pressure detection device 20 is mainly used for performing pressure detection on the liquid medicine in the liquid storage chamber 20a to continuously and dynamically detect physiological parameters of a monitored person, such as arterial pressure, venous pressure and the like. To facilitate the medical staff's observation of physiological parameters, the pressure detection device 20 can be connected to a monitor. Therefore, the pressure change condition in the liquid storage cavity 20a collected by the pressure detection device 20 is converted into an electric signal and is transmitted to the monitor, and the monitor can convert the electric signal into a visible waveform image for observation and statistics of medical personnel. The blood recovery device 30 is mainly used to communicate the liquid storage cavity 20a of the pressure detection device 20 with the blood vessel of the monitored person, and can drive the blood in the sampling three-way valve 40 to be conveyed back into the blood vessel by using the liquid medicine in the liquid return cavity 30a after use, so as to reduce the loss of the monitored blood. The sampling three-way valve 40 is mainly used to connect or block the communication between the pressure detection device 20 and the blood vessel of the monitored person, and the blood sampling device and the monitored person. For example, when detecting a physiological parameter such as an arterial pressure or a venous pressure of the subject, the sampling three-way valve 40 may open the first port 41 and the third port 43; when the monitored person needs to be sampled for blood drawing, the second interface 42 and the third interface 43 can be conducted.

When the invasive pressure sensor of the technical scheme of the invention is used, the perfusion device 10 is communicated with the liquid medicine container, and the third interface 43 of the sampling three-way valve 40 is communicated with the blood vessel of the monitored person. So that the medical liquid can flow from the perfusion device 10 to the liquid storage cavity 20a of the pressure detection device 20, and the blood can flow from the sampling three-way valve 40 to the liquid return cavity 30a of the blood recovery device 30. Because the liquid returning cavity 30a is communicated with the liquid storage cavity 20a, the liquid medicine in the liquid storage cavity 20a can flow into the liquid returning cavity 30a, and at the moment, the liquid storage cavity 20a in the pressure detection device 20 is communicated with the blood vessel of the monitored person. The pressure change detected by the pressure detection device 20 with respect to the medical fluid in the reservoir chamber 20a is equivalent to the pressure change of the blood in the blood vessel, and thus continuous dynamic detection of physiological parameters such as arterial pressure and venous pressure of the monitored person by the pressure detection device 20 is realized. Because be equipped with filtration membrane 11 in the perfusion device 10, can filter the liquid medicine through this filtration membrane 11, avoid impurity to enter into the intravascular of monitored person along with the liquid medicine and lead to causing the influence to monitored person's health to the security of invasive pressure sensor use has been improved.

When the invasive pressure sensor performs blood sampling, the second port 42 and the third port 43 of the sampling three-way valve 40 are connected, and the blood sampling device connected to the second port 42 performs blood sampling on the subject through the sampling three-way valve 40. Therefore, the skin of the monitored person does not need to be punctured additionally, and the skin damage to the monitored person in the blood sampling process is reduced. After the blood sampling is completed, the blood collection device 30 conveys the blood remaining in the sampling three-way valve 40 back to the blood vessel of the subject by the medical fluid in the fluid returning chamber 30 a. Therefore, the phenomenon that the monitored person loses excessive blood after blood sampling is avoided, and the discomfort of the monitored person is avoided.

Referring to fig. 2 and 3, in an embodiment of the present invention, the perfusion apparatus 10 includes a chamber body 12 and a puncture device 13, the chamber body 12 is formed with a first liquid passing channel 12a, the first liquid passing channel 12a is communicated with the liquid storage cavity 20a, the filter membrane 11 is disposed in the first liquid passing channel 12a, the puncture device 13 is connected to the chamber body 12 and has a puncture end 131 communicated with the first liquid passing channel 12a, and the puncture end 131 is configured to be inserted into the liquid medicine container, so that the first liquid passing channel 12a is communicated with the liquid medicine container.

It can be understood that the communication between the perfusion device 10 and the liquid medicine container can be realized by inserting the puncturing end 131 of the puncture outfit 13 into the liquid medicine container, and the process is simple and quick, so that the convenience of using the invasive pressure sensor is improved. The cross section of the first liquid passing channel 12a can be arranged in a circular shape, so that the uniformity of flow velocity of the liquid medicine at each position in the first liquid passing channel 12a is guaranteed, bubbles can be avoided, and the use safety of the invasive pressure sensor is further improved. The cross-sectional area of the piercing end 131 gradually decreases from the end close to the chamber body 12 to the end away from the chamber body 12, so that the piercing end 131 pierces the medical fluid container and is inserted into the medical fluid container. In order to facilitate the assembly between the drip chamber body 12 and the puncture outfit 13, the drip chamber body 12 and the puncture outfit 13 may be connected by a screw thread, specifically, an outer circumferential surface of the drip chamber body 12 may be provided with an external thread, and an inner circumferential surface of the puncture outfit 13 may be provided with an internal thread matching with the external thread; the inner peripheral surface of the drip chamber body 12 may be provided with female threads, and the outer peripheral surface of the puncture outfit 13 may be provided with male threads. Of course, the present application is not limited thereto, and in other embodiments, the dropping funnel main body 12 and the puncturing device 13 may be connected by a snap, and specifically, may be located in the dropping funnel main body 12 and the puncturing device 13, respectively, where one of the snap and the buckling hole is provided, and the other of the snap and the buckling hole is provided, and the snap is buckled in the buckling hole, so that the puncturing device 13 is detachably connected to the dropping funnel main body 12. Further, in order to prevent the puncture tip 131 of the puncture device 13 from being easily damaged by collision with foreign objects, the perfusion apparatus 10 further includes a protective cap 15, and the protective cap 15 is sleeved on the outer surface of the puncture tip 131 to protect the puncture tip 131.

In an embodiment of the present invention, the perfusion apparatus further includes a filter membrane fixing seat 14, the filter membrane fixing seat 14 is disposed in the first liquid passing channel 12a, the filter membrane fixing seat 14 is provided with a filter membrane installation groove 14a, and the filter membrane 11 is embedded in the filter membrane installation groove 14 a.

It is understood that such an arrangement may be made by installing the filter membrane 11 in the filter installation groove 14a of the filter fixing base 14 and then installing the filter fixing base 14 in the first permeate passage 12 a. Namely, the filtration membrane 11 is conveniently arranged in the first liquid passing channel 12a under the supporting action of the fixed seat of the filtration membrane 11, so that the assembling efficiency of the perfusion apparatus is improved. In order to improve the stability of the installation of the filtering membrane 11, one of a buckle and a buckle hole may be disposed on a side of the filtering membrane 11 facing the bottom wall of the filtering membrane installation groove 14a, one of the buckle and the buckle hole may be disposed on the bottom wall of the filtering membrane installation groove 14a, and the buckle is buckled in the buckle hole, so that the filtering membrane 11 is connected to the filtering membrane fixing seat 14.

Referring to fig. 4, in an embodiment of the present invention, the pressure detecting device 20 includes a chip mounting case 21 and a chip 22, the chip mounting case 21 has a liquid storage cavity 20a, and the chip 22 is disposed in the chip mounting case 21 and partially inserted into the liquid storage cavity 20 a.

It is understood that the chip 22 is disposed in the chip mounting case 21, so that the chip 22 is prevented from being exposed and easily damaged, thereby improving the service life of the chip 22. Wherein, the chip 22 can be adhered to the chip mounting case 21 by gluing to improve the stability of the mounting of the chip 22. In addition, in order to facilitate the connection between the chip 22 and the monitor, a wire 23 may be connected to the chip 22, and the other end of the wire 23 may be connected to the monitor.

In an embodiment of the invention, the chip mounting housing 21 includes a chip upper housing 211 and a chip lower housing 212, the chip upper housing 211 has a liquid storage cavity 20a, and the chip lower housing 212 is connected to the chip upper housing 211 and cooperates with the chip upper housing 211 to clamp and fix the chip 22.

It is understood that the chip mounting case 21 is provided as the chip upper case 211 and the chip lower case 212 so that both can be independently produced. This simplifies the molding process of the chip mounting case 21, so that the production efficiency of the chip mounting case 21 can be improved. In order to improve the assembly efficiency of the chip mounting case 21, the chip upper case 211 and the chip lower case 212 may be coupled by screws, which simplifies the assembly process of the two. Of course, in other embodiments, the chip upper case 211 and the chip lower case 212 may be connected by a snap, specifically, the chip upper case 211 is provided with one of a snap and a snap hole, the chip lower case 212 is provided with the other of a snap and a snap hole, and the snap is snapped into the snap hole, so that the chip upper case 211 is connected to the chip lower case 212.

In an embodiment of the present invention, the chip 22 includes a chip body 221 and a probe 222, the chip body 221 is connected to the chip mounting case 21, the probe 222 is connected to the chip body 221, and an end of the probe 222 away from the chip body 221 is inserted into the liquid storage cavity 20 a.

It can be understood that the probe 222 of the chip 22 is inserted into the reservoir 20a, and the change of the pressure in the reservoir 20a can be directly obtained by the probe 222, thereby improving the accuracy of the detection result of the chip 22. The chip 22 is fixed by the chip body 221, so that a fixing structure is not required to be arranged on the probe 222, thereby ensuring the stability of fixing the chip 22 and avoiding damaging the probe 222.

Referring to fig. 5, in an embodiment of the present invention, the blood recovery device 30 includes a liquid return cylinder 31 and a piston 32, the liquid return cylinder 31 has a liquid return cavity 30a, the piston 32 is movably disposed in the liquid return cavity 30a, and the piston 32 moves relative to the liquid return cylinder 31, so that the blood in the liquid return cavity 30a flows out through the third port 43 of the sampling three-way valve 40 to flow back to the blood vessel of the monitored person.

Specifically, when the piston 32 is driven to perform the suction operation, the medical fluid in the reservoir 20a of the pressure detection device 20 and the blood in the blood vessel of the monitored person can be sucked back into the fluid chamber 30a, and the pressure detection device 20 and the blood vessel of the monitored person are conducted. When the piston 32 is driven to perform the air exhaust operation when the blood remaining in the three-way valve needs to be returned to the blood vessel of the human body, the liquid medicine in the liquid return chamber 30a can be used to drive the blood remaining in the three-way valve to be returned to the blood vessel of the human body from the third port 43. It can be understood that such an arrangement is simple in structure, and can reduce the manufacturing cost of the blood recovery device 30, and also facilitate the operation, the suction of the medical solution and the return of the blood. Of course, the present invention is not limited to this, and in another embodiment, the blood collecting apparatus 30 may be configured by a depressible air bag, and the air bag may be depressed to perform a gas discharging operation to return the blood.

In one embodiment of the present invention, the blood recovery device 30 further comprises a push rod 33, the push rod 33 is connected to the piston 32, and the external force acts on the push rod 33 to drive the piston 32 to move relative to the liquid return cylinder 31.

It will be appreciated that the push rod 33 is provided to facilitate the medical personnel to apply force to the piston 32 to drive the piston 32 to move relative to the fluid return cylinder 31, thereby improving the convenience of use of the blood recovery device 30. In order to fix and limit the piston 32 at any height, the suction amount and the extrusion amount of the liquid medicine are controlled by adjusting the pressure in the liquid returning chamber 30 a. The outer peripheral wall of the piston 32 rod is provided with an external thread, and the liquid return cylinder 31 is provided with an internal thread matched with the external thread, so that the piston 32 can be driven to move by rotating the piston 32 rod, and the piston 32 can be limited and fixed by stopping rotating the piston 32 rod. Further, in order to ensure the sealing performance of the flashback chamber 30a, the blood recovery device 30 further includes a rubber sleeve 34, and the rubber sleeve 34 is sleeved outside the piston 32 and abuts against the inner side wall of the flashback barrel 31. Therefore, the air pressure in the liquid return cavity 30a can be prevented from being communicated with the external air pressure through the gap between the piston 32 and the liquid return cylinder 31 by the sealing effect of the rubber sleeve 34, so that the stability of the air pressure in the liquid return cavity 30a is ensured.

Referring to fig. 1, 4 and 5, in an embodiment of the present invention, the invasive pressure sensor further includes a check valve 50, and the check valve 50 is connected to the liquid storage cavity 20a and the liquid return cavity 30a to conduct the flow direction of the liquid medicine flowing from the liquid storage cavity 20a to the liquid return cavity 30 a.

It can be understood that the one-way valve 50 ensures that the liquid medicine in the liquid return chamber 30a flows only to the sampling three-way valve 40 when the piston 32 performs the exhaust operation, thereby improving the recovery efficiency of the residual blood in the sampling three-way valve 40 after the blood sampling by the invasive pressure sensor.

Referring to fig. 1, 4 and 6, in an embodiment of the present invention, the invasive pressure sensor further includes a flow adjusting device 60, the flow adjusting device 60 is connected to the perfusion device 10 and the liquid storage cavity 20a, and the flow adjusting device 60 is used for adjusting the flow rate of the liquid medicine flowing from the perfusion device 10 to the liquid storage cavity 20 a.

It is understood that the flow regulating device 60 can be arranged to connect or disconnect the communication between the perfusion device 10 and the pressure detecting device 20, and can regulate the amount of the liquid passing through. Thus, when the liquid medicine flows into the liquid storage cavity 20a of the pressure detection device 20 and the size of the liquid medicine flowing into the liquid storage cavity can be controlled, and controllability is improved.

In an embodiment of the present invention, the flow adjusting device 60 includes an adjusting housing 61 and a roller 62, the adjusting housing 61 is provided with a second liquid passing channel 61a, the second liquid passing channel is communicated with the filling device 10 and the liquid storage cavity 20a, the roller 62 is movably disposed in the adjusting housing 61 and is partially embedded in the second liquid passing channel 61a, the roller 62 moves relative to the adjusting housing 61, and the distance between the roller 62 and the inner wall of the second liquid passing channel 61a can be adjusted to adjust the size of the liquid medicine.

Specifically, when the amount of the liquid medicine flowing into the liquid storage chamber 20a needs to be adjusted, the roller 62 may be moved to change the distance between the roller 62 and the inner wall of the second liquid passing channel 61a, so that the flow rate of the liquid medicine flowing between the roller 62 and the inner wall of the second liquid passing channel 61a is changed. In order to ensure the stability of the roller 62 during the moving process, an inclined sliding hole may be disposed on the adjusting housing 61, and the roller 62 is embedded in the sliding hole and can move in the sliding hole. Of course, the present application is not limited thereto, and in other embodiments, the flow regulating device 60 may also include a flow regulating valve.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An invasive pressure sensor, comprising:

2. The invasive pressure sensor according to claim 1, wherein the perfusion device comprises a chamber body and a puncture device, the chamber body is formed with a first fluid passage, the first fluid passage is communicated with the reservoir chamber, the filter membrane is disposed in the first fluid passage, the puncture device is connected to the chamber body and has a puncture end communicated with the first fluid passage, and the puncture end is inserted into the medical fluid container to communicate the first fluid passage with the medical fluid container.

3. The invasive pressure sensor according to claim 2, wherein the syringe further comprises a filter membrane holder, the filter membrane holder is disposed in the first fluid passage, the filter membrane holder is provided with a filter membrane mounting groove, and the filter membrane is embedded in the filter membrane mounting groove.

4. The invasive pressure sensor according to any of claims 1 to 3, wherein the pressure detection device comprises a chip mounting housing and a chip, the chip mounting housing is provided with the reservoir, and the chip is arranged in the chip mounting housing and partially inserted into the reservoir.

5. The invasive pressure sensor according to claim 4, wherein the chip mounting housing comprises an upper chip housing and a lower chip housing, the upper chip housing is provided with the liquid storage cavity, and the lower chip housing is connected to the upper chip housing and is matched with the upper chip housing to clamp and fix the chip;

6. The invasive pressure sensor according to any one of claims 1 to 3, wherein the blood recovery device comprises a fluid return cylinder and a piston, the fluid return cylinder is provided with the fluid return chamber, the piston is movably arranged in the fluid return chamber, and the piston moves relative to the fluid return cylinder to make the blood in the fluid return chamber flow out through the third port of the sampling three-way valve.

7. The invasive pressure sensor of claim 6, wherein the blood reclamation apparatus further comprises a push rod coupled to the piston, wherein an external force acts on the push rod to drive the piston to move relative to the fluid return cylinder.

8. The invasive pressure sensor according to claim 6, further comprising a one-way valve communicating between the reservoir and the flashback chamber for communicating a flow direction of the medical fluid from the reservoir to the flashback chamber.

9. The invasive pressure sensor according to any of claims 1 to 3, further comprising a flow regulating device in communication with the perfusion device and the reservoir, the flow regulating device for regulating the flow of the medical fluid from the perfusion device to the reservoir.

10. The invasive pressure sensor according to claim 9, wherein the flow regulating device comprises a regulating housing and a roller, a second fluid passage is disposed in the regulating housing, the second fluid passage is connected to the filling device and the reservoir chamber, the roller is movably disposed in the regulating housing and partially embedded in the second fluid passage, the roller moves relative to the regulating housing, and the distance between the roller and the inner wall of the second fluid passage is adjustable to adjust the size of the liquid medicine.