CN218002777U - Pressure detection device - Google Patents

Abstract

A pressure detection device, comprising: the catheter is inserted into the sleeve and forms a closed lumen with the sleeve, the catheter air bag is positioned in the lumen, and the lumen is communicated with the air chamber to be detected. One end of the catheter is communicated with the catheter air bag, the other end of the catheter is communicated with a pressure measurer, and the pressure measurer detects the pressure change of the air chamber to be measured through the catheter air bag. A closed tube cavity is formed by the sleeve and the catheter, the tube cavity is communicated with the air chamber to be tested, and the catheter air bag on the sleeve is arranged in the tube cavity. When the pressure of the air chamber to be measured changes, the communicated tube cavities also change correspondingly, and then the catheter air bag in the tube cavities acts, so that the catheter air bag contracts or expands. After the air pressure in the catheter air bag changes, the air pressure can be directly fed back to the pressure measurer, and then the pressure detection work can be completed. The designed pressure detection device is simple in structure and easy to operate, and can feed back an air pressure detection result timely and visually.

Description

Pressure detection device

Technical Field

The application relates to the technical field of medical equipment, in particular to a pressure detection device.

Background

In modern clinical medicine, a ventilator has been widely used in respiratory failure due to various reasons, anesthesia and respiratory management during major surgery, respiratory support therapy, and emergency resuscitation as an effective means for manually replacing the function of spontaneous ventilation, and has a very important position in the modern medical field. The breathing machine is a vital medical device which can prevent and treat respiratory failure, reduce complications and save and prolong the life of a patient.

In the use process of the respirator, the detection of the air pressure is crucial, and a pressure detection device is needed to be matched with the detection of the change of the air pressure. The conventional pressure detection device can detect pressure change, but has a problem of complicated structure. Therefore, it is necessary to develop a pressure detecting device with simple structure and easy operation.

SUMMERY OF THE UTILITY MODEL

The application provides a pressure detection device, and the main purpose of the pressure detection device is to simplify the structure of the pressure detection device.

An embodiment of the present application provides a pressure detection apparatus, including: the catheter is inserted into the sleeve and forms a closed lumen with the sleeve, the catheter balloon is positioned in the lumen, and the lumen is used for being communicated with a tested air chamber; one end of the catheter is communicated with the catheter balloon, the other end of the catheter is communicated with a pressure measurer, and the pressure measurer detects pressure change of the measured air chamber through the catheter balloon.

In one embodiment, the catheter comprises a first manifold in communication with the first catheter balloon, a second manifold in communication with the second catheter balloon through the first catheter balloon, a first catheter balloon, and a second catheter balloon; the sleeve comprises a first sleeve and a second sleeve, the first catheter balloon is positioned in a first lumen formed by the first sleeve and the catheter, and the second catheter balloon is positioned in a second lumen formed by the second sleeve and the catheter; the measured air chamber comprises a first measured air chamber and a second measured air chamber, the first tube cavity is communicated with the first measured air chamber, and the second tube cavity is communicated with the second measured air chamber.

In one embodiment, the pressure measurer comprises a first pressure measurer and a second pressure measurer; the first tested air chamber is used for simulating a chest cavity, and the second tested air chamber is used for simulating an abdominal cavity; one end of the first manifold is communicated with the first catheter balloon, the other end of the first manifold is communicated with the first pressure measurer, and the first pressure measurer is used for measuring the pressure of the simulated chest cavity; one end of the second manifold is communicated with the second catheter balloon, the other end of the second manifold is communicated with the second pressure measurer, and the second pressure measurer is used for measuring the pressure of the simulated abdominal cavity.

In one embodiment, one end of the first sleeve is a head end, and the other end of the first sleeve is a tail end; one end of the second sleeve is a top end, and the other end of the second sleeve is a bottom end; the head end and the tail end of the first sleeve are both provided with a first sealing element and an open hole pipe plug, and the first sealing element is positioned between the open hole pipe plug and the end part of the first sleeve; the perforated pipe plug on the tail end is abutted against the top end, a positioning piece is arranged on the second sleeve, and the positioning piece is used for positioning and fixing the second sleeve; the first manifold passes through the open stopple and the first seal and communicates with the first catheter balloon; the second manifold passes through the apertured plug, the seal, and the first catheter balloon and communicates with the second catheter balloon.

In one embodiment, the first sealing element is a conical sealing element, and a through hole for the first manifold and the second manifold to pass through is formed in the center of the first sealing element; and two ends of the first sleeve are respectively provided with a support groove matched with the first sealing element in shape, and the first sealing element is arranged on the support grooves.

In one embodiment, a second seal is provided between the apertured plug at the trailing end and the top end.

In one embodiment, the top end is provided with a positioning groove, and the second sealing element is located on the positioning groove.

In one embodiment, a first communicating structure is arranged on the first sleeve and used for communicating the first tested air chamber with the first tube cavity; and a second communicating structure is arranged on the second sleeve and used for communicating the second tested air chamber with the second pipe cavity.

In one embodiment, the second communication structure comprises a first vent connector, an adapter tube, and a second vent connector; one end of the first ventilation joint is communicated with the second lumen, and the other end of the first ventilation joint is communicated with one end of the adapter tube; the other end of the adapter tube is communicated with one end of the second air joint, and the other end of the second air joint is communicated with the second tested air chamber.

In one embodiment, the catheter further comprises a third manifold passing through the first catheter balloon, the second catheter balloon, and the second communicating structure and into the second gas chamber under test, the third manifold for delivering nutrients to the second gas chamber under test.

In one embodiment, the conduit further comprises an initial pneumatic tube, a transit pneumatic tube and a tail pneumatic tube; three channels are arranged in the starting air pressure pipe so that the first manifold, the second manifold and the third manifold can penetrate through the channels respectively, and the starting air pressure pipe is connected with the first catheter air bag; two channels are arranged in the transfer air pressure pipe so that the second manifold and the third manifold can penetrate through the transfer air pressure pipe respectively, and two ends of the transfer air pressure pipe are connected with the first catheter air bag and the second catheter air bag respectively; and a channel is formed in the tail pneumatic tube so that the third manifold can pass through the channel, and two ends of the tail pneumatic tube are respectively connected with the second catheter air bag and the second communication structure.

In one embodiment, the first manifold is provided with a chest valve at the end, the second manifold is provided with a abdominal valve at the end, and the third manifold is provided with a feeding valve at the end.

According to the pressure detection device of the above embodiment, a closed lumen is formed by the cannula and the catheter inserted into the cannula, the lumen communicates with the gas chamber to be detected, and the catheter balloon on the cannula is placed in the lumen. When the pressure of the measured air chamber changes, the communicated tube cavities also change correspondingly, and then the catheter air bag in the tube cavities acts, so that the catheter air bag contracts or expands. After the air pressure in the catheter air bag changes, the air pressure can be directly fed back to the communicated pressure measurer, and then the pressure detection work can be completed. The designed pressure detection device is simple in structure and easy to operate, and can feed back an air pressure detection result timely and visually.

Drawings

Fig. 1 is a schematic perspective view of a pressure detection device according to an embodiment of the present disclosure;

FIG. 2 is a partial perspective view of a pressure detection device according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram illustrating a partial explosion structure of a pressure detecting device according to an embodiment of the present disclosure;

FIG. 4 is a cross-sectional view of a second sleeve according to an embodiment of the present disclosure;

fig. 5 is a schematic cross-sectional view illustrating an application scenario of a first sleeve and a positioning element according to an embodiment of the present disclosure;

fig. 6 is a schematic perspective view of an application scenario of a first sleeve and a positioning element according to an embodiment of the present application.

Description of the reference numerals: 10. the first manifold, 11, a chest valve, 20, a second manifold, 21, an abdominal cavity valve, 30, a first catheter air bag, 40, a second catheter air bag, 50, a first sleeve, 51, a head end, 52, a tail end, 53, a supporting groove, 60, a second sleeve, 61, a top end, 62, a bottom end, 63, a positioning groove, 70, a first sealing element, 80, an opening pipe plug, 90, a positioning element, 100, a second sealing element, 110, a first communication structure, 120, a second communication structure, 121, a first ventilation joint, 122, an adapter pipe, 123, a second ventilation joint, 130, a third manifold, 131, a nutrition valve, 140, a starting air pressure pipe, 150, a middle air pressure pipe, 160 and a tail air pressure pipe.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the description of the methods may be transposed or transposed in order, as will be apparent to a person skilled in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" as used herein includes both direct and indirect connections (couplings), unless otherwise specified.

As shown in fig. 1-6, in one embodiment, a pressure sensing device includes: the catheter comprises a sleeve and a catheter with a catheter air bag, wherein the catheter is inserted into the sleeve and forms a closed cavity together with the sleeve, and the catheter air bag is positioned in the cavity, namely the catheter with the catheter air bag is partially inserted into the sleeve. The tube cavity is used for being communicated with the air chamber to be detected. One end of the catheter is communicated with the catheter air bag, the other end of the catheter is communicated with a pressure measurer, and the pressure measurer detects the pressure change of the air chamber to be measured through the catheter air bag. The pressure measurer can be an independent device or a part of a respirator, and the pressure measurer can detect the pressure change of the air chamber to be measured.

By adopting the pressure detection device in the embodiment, a closed tube cavity is formed by the sleeve and the catheter inserted in the sleeve, the tube cavity is communicated with the air chamber to be detected, and the catheter air bag on the sleeve is arranged in the tube cavity. When the pressure of the air chamber to be measured changes, the communicated tube cavities also change correspondingly, and then the catheter air bag in the tube cavities acts, so that the catheter air bag contracts or expands. After the air pressure in the catheter air bag changes, the air pressure can be directly fed back to the communicated pressure measurer, and then the pressure detection work can be completed. The designed pressure detection device is simple in structure and easy to operate, and can feed back an air pressure detection result timely and visually.

As shown in fig. 1-3, the catheter includes a first manifold 10, a second manifold 20, a first catheter balloon 30, and a second catheter balloon 40. Wherein the first manifold 10 is in communication with the first catheter balloon 30 and the second manifold 20 is in communication with the second catheter balloon 40 through the first catheter balloon 30. The sleeve comprises a first sleeve 50 and a second sleeve 60, the first catheter balloon 30 being located within a first lumen formed by the first sleeve 50 and the catheter, i.e. the portion of the catheter comprising the first catheter balloon 30 is inserted within the first sleeve 50, and the second catheter balloon 40 being located within a second lumen formed by the second sleeve 60 and the catheter, i.e. the portion of the catheter comprising the second catheter balloon 40 is inserted within the second sleeve 60. The air chamber to be measured comprises a first air chamber to be measured and a second air chamber to be measured, the first tube cavity is communicated with the first air chamber to be measured, and the second tube cavity is communicated with the second air chamber to be measured. First air chamber under test and second air chamber under test are spatial structure, do not belong to this application pressure measurement device's partly, only for using with pressure measurement device cooperation, this application does not show first air chamber under test and second air chamber under test.

The first manifold 10, the first sleeve 50 and the second sleeve 60 are sequentially connected directly or indirectly along the length direction, and the second manifold 20 is communicated through the first catheter balloon 30 in the first sleeve 50 and the second catheter balloon 40 in the second sleeve 60 along the length direction. Taking the first manifold 10 as an example, the longitudinal direction refers to a direction corresponding to the axial length of the first manifold 10. The second manifold 20 is communicated with the second catheter balloon 40 through the first catheter balloon 30, and has a simple structure, is convenient to store and arrange, and avoids complex pipeline layout. In other embodiments, the first manifold 10 and the first catheter balloon 30 are in one set, the second manifold 20 and the second catheter balloon 40 are in one set, and the two sets can be in a relatively independent state. In this way, the second manifold 20 can communicate directly with the second catheter balloon 40 without passing through the first catheter balloon 30, i.e., without passing through the first sleeve 50.

Wherein, the pressure measurer comprises a first pressure measurer and a second pressure measurer. The first tested air chamber is used for simulating the chest cavity, and the second tested air chamber is used for simulating the abdominal cavity. The first manifold 10 is in communication with a first catheter balloon 30 at one end and a first pressure gauge at the other end for measuring pressure in the simulated chest cavity. The second manifold 20 has one end in communication with the second catheter balloon 40 and another end for communication with a second pressure gauge for measuring the pressure of the simulated abdominal cavity. First pressure measurement ware and second pressure measurement ware are two independent devices, and mutual noninterference adopts this kind of form, can measure arbitrary one in simulation thorax and the simulation abdominal cavity, perhaps measures the pressure of simulation thorax and simulation abdominal cavity simultaneously for pressure measurement device has more nimble using-way. When the simulated thoracic and abdominal pressures are measured simultaneously, the trans-phrenic pressure parameters can also be measured. By adopting the pressure detection device, the working performance of the breathing machine can be comprehensively reflected.

As shown in fig. 1, the first casing 50 has a head end 51 at one end and a tail end 52 at the other end. As shown in fig. 4, one end of the second sleeve 60 is a top end 61 and the other end is a bottom end 62. As shown in fig. 2-3, the head end 51 and the tail end 52 of the first casing 50 are each provided with a first seal 70, a perforated plug 80, the first seal 70 being located between the perforated plug 80 and the end of the first casing 50. The perforated pipe plug 80 on the tail end 52 is abutted with the top end 61, and the second sleeve 60 is provided with a positioning piece 90, and the positioning piece 90 is used for realizing the positioning and fixing of the second sleeve 60. The first manifold 10 passes through the apertured plug 80 and the first seal 70 and communicates with the first catheter balloon 30. The second manifold 20 passes through the apertured plug 80, the first seal 70, and the first catheter balloon 30, and communicates with the second catheter balloon 40.

First sleeve pipe 50 is hollow tubular structure, and both ends are the opening form, through set up trompil stopcock 80 respectively at head end 51 and tail end 52, help guaranteeing the leakproofness of first lumen, and this kind of structure is convenient for assemble pressure measurement device simultaneously, is convenient for transport or is convenient for maintain the replacement to some part of pressure measurement device. The second sleeve 60 has an open top end 61 and a closed bottom end 62. The perforated pipe plug 80 on the tail end 52 is abutted with the top end 61, namely the tail end 52 of the first sleeve 50 and the top end 61 of the second sleeve 60 share the perforated pipe plug 80, the structure is simplified, the cost is saved, and the top end 61 of the second sleeve 60 is abutted with the perforated pipe plug 80, so that the sealing performance in the second pipe cavity can be well guaranteed.

The positioning member 90 is in a ring shape, a column shape, a tube shape, a lock, for example, the positioning member 90 is in a tube shape, the top of the positioning member 90 is open, the bottom of the positioning member is provided with an internal thread, the second sleeve 60 is placed in the positioning member 90, and the bottom 62 of the second sleeve 60 is in threaded connection with the bottom of the positioning member 90. As shown in fig. 5, the top of the second sleeve 60 may be higher than the top of the positioning member 90 or flush with the top of the positioning member 90. For example, the positioning member 90 fixes the second sleeve 60 to the housing of the air chamber to be tested, the positioning member 90 may be integrated with the housing of the air chamber to be tested, or the positioning member 90 may be detachably fixed to the housing of the air chamber to be tested. The first sleeve 50 may be integrated with the housing of the measured air chamber or detachably fixed to the housing of the measured air chamber. The positioning member 90 facilitates assisting the second sleeve 60 in abutting the apertured spigot 80 after the second sleeve 60 is fixed in position. The retainer 90 is detachably connected to the second sleeve 60 to facilitate the removal of the plug 80 at the end 52 of the first sleeve 50.

Specifically, the first sealing element 70 and the opening plug 80 are both provided with through holes for the conduit to pass through, and the opening plug 80 is in threaded fit with the first sleeve 50. The arrangement of the perforated pipe plug 80 helps to ensure the sealing performance of the first pipe cavity, and the arrangement of the first sealing element 70 can not only further ensure the sealing performance of the first pipe cavity, but also play a role in limiting and supporting the first catheter air bag 30 in the first sleeve 50.

The first sealing element 70 is a conical sealing element, and the center of the first sealing element 70 is provided with a through hole for the first manifold 10 and the second manifold 20 on the guide pipe to pass through. The radial dimension of the conical sealing element is continuously increased or reduced along the axial direction, specifically, as shown in fig. 3, the conical sealing element is in a circular truncated cone shape, and a circular ring structure is arranged on the larger side of the diameter of the conical sealing element. This kind of toper sealing member of shape, at first, when receiving the extrusion force that trompil stopcock 80 spiral produced, the round platform can produce the shrink, to middle polymerization, with the pipe laminating to guarantee with the leakproofness of pipe laminating department, the ring is compressed, with the direct inseparable laminating of first sleeve 50, with the leakproofness of guarantee with the laminating department of first sleeve 50. Secondly, the through hole formed in the conical sealing element is relatively large, and the aperture of the through hole is larger than the pipe diameter of the guide pipe in the state of no external force extrusion. When the through hole of the first sealing member 70 is large, there is a large amount of deformation, which facilitates the passage of the catheter balloon through the through hole, thereby facilitating maintenance and replacement of the catheter balloon. If adopt conventional O type circle, though can play sealed effect, the inner bore diameter of O type circle is generally the same with the pipe diameter of pipe or slightly less than the pipe diameter of pipe, if need maintain the change pipe gasbag this moment, can be unfavorable for the pipe gasbag to pass because O type circle bore diameter is slightly littleer, can extrude the damage pipe gasbag even.

Preferably, as shown in fig. 5, both ends of the first sleeve 50 are provided with support grooves 53 adapted to the shape of the first sealing member 70, and the first sealing member 70 is disposed on the support grooves 53. When the first sealing element 70 is a structure of a circular truncated cone and a circular ring, the supporting groove 53 also corresponds to a groove-shaped structure including the circular truncated cone and the circular ring, so that the first sealing element 70 can be better matched to exert a sealing effect.

To better ensure the sealing within the second lumen, a second seal 100 is provided between the apertured plug 80 at the trailing end 52 and the leading end 61, as shown in FIG. 3. When the perforated pipe plug 80 abuts against the top end 61 of the second sleeve 60, a pressing force is applied to the second sealing element 100, so that the second sealing element 100 is deformed, and the sealing performance of the second pipe cavity is further guaranteed. The second sealing element 100 is a sealing ring structure, and correspondingly, a positioning groove 63 is formed in the top end 61 of the second sleeve 60, and the second sealing element 100 is located on the positioning groove 63. Set up constant head tank 63, on the one hand, be convenient for location, installation second sealing member 100, on the other hand, can improve the laminating area of second sealing member 100, and then improve sealing performance.

The first sleeve 50 is provided with a first communicating structure 110, and the first communicating structure 110 is used for communicating the first measured air chamber with the first lumen. For example, as shown in fig. 5, the first communicating structure 110 is a hole-shaped structure, that is, a hole is opened on the first sleeve 50 to communicate with the first measured air chamber, so as to communicate the first measured air chamber with the first lumen. If the first sleeve 50 is spaced apart from the first measured air chamber, the first communicating structure 110 can be configured as a tubular structure to communicate the first measured air chamber with the first lumen. When the air pressure of the first measured air chamber is increased, the air pressure in the first tube cavity is also increased, the first catheter air bag 30 in the first tube cavity is correspondingly extruded, the pressure in the first catheter air bag 30 is changed, and the first pressure measurer can obtain the air pressure condition in the first measured air chamber by detecting the pressure in the first catheter air bag 30, namely, the air pressure condition in the simulated thoracic cavity is obtained. When the air pressure of the first measured air chamber is reduced, the air pressure in the first tube cavity is also reduced, the corresponding first catheter air bag 30 in the first tube cavity is expanded, the pressure in the first catheter air bag 30 is changed, and the first pressure measurer can obtain the air pressure condition in the first measured air chamber by detecting the pressure in the first catheter air bag 30, namely, obtain the air pressure condition in the simulated chest cavity. The detection principle of the simulated abdominal cavity is the same, and the description is omitted.

The second sleeve 60 is provided with a second communicating structure 120, and the second communicating structure 120 is used for communicating the second measured air chamber with the second lumen. Specifically, as shown in fig. 3, the second communication structure 120 includes a first vent connector 121, an adapter tube 122, and a second vent connector 123. One end of the first vent fitting 121 is secured to the bottom end 62 of the second cannula 60 and is in communication with the second lumen, and the other end of the first vent fitting 121 is in communication with one end of the adapter tube 122. The other end of the adapter tube 122 is communicated with one end of the second vent joint 123, and the other end of the second vent joint 123 is used for being communicated with the second tested air chamber.

The catheter further includes a third manifold 130, the third manifold 130 passing through the first catheter balloon 30, the second catheter balloon 40 and the second communicating structure 120 and into the second air chamber under test, the third manifold 130 for delivering nutrients to the second air chamber under test.

As shown in fig. 3, the catheter further includes a starting pneumatic tube 140, a middle pneumatic tube 150, and a tail pneumatic tube 160. Three passages are provided in the starting pneumatic tube 140 so that the first manifold 10, the second manifold 20, and the third manifold 130 pass through, respectively, and the starting pneumatic tube 140 is connected to the first catheter balloon 30. The first manifold 10 and the first catheter balloon 30 within the starting pneumatic tube 140 are in communication, and the second manifold 20 and the third manifold 130 within the starting pneumatic tube 140 pass through the first catheter balloon 30, respectively. Two passages are arranged in the intermediate pneumatic tube 150 so that the second manifold 20 and the third manifold 130 can respectively pass through, and two ends of the intermediate pneumatic tube 150 are respectively connected with the first catheter balloon 30 and the second catheter balloon 40 and are communicated with the second manifold 20 and the second catheter balloon 40 of the first catheter balloon 30. A channel is formed in the tail pneumatic tube 160 so that the third manifold 130 can pass through the channel, two ends of the tail pneumatic tube 160 are respectively connected with the second catheter air bag 40 and the second communication structure 120, and the third manifold 130 sequentially passes through the first catheter air bag 30 and the second catheter air bag 40 and then enters the simulated abdominal cavity through the second communication structure 120. In other embodiments, the tail pneumatic tube 160 may not be provided, and the third manifold 130 may pass through the second catheter balloon 40 and then directly through the second communicating structure 120 into the simulated abdominal cavity. Specifically, whether to install the rear pneumatic tube 160 may be determined according to the actual space and the connection requirement.

To facilitate control of the air pressure in the tube and the cleanliness in the tube, a chest valve 11 is provided at the end of the first manifold 10 and a abdominal valve 21 is provided at the end of the second manifold 20. The first manifold 10 communicates with a first pressure gauge through a chest valve 11 and the second manifold 20 communicates with a second pressure gauge through a abdominal valve 21. In order to ensure the cleanliness in the tubes of the third manifold 130 and to prevent contamination by external dust, a service valve 131 is provided at an end of the third manifold 130. Wherein, the chest valve 11, the abdominal cavity valve 21 and the nutrition valve 131 are valve bodies such as a three-way valve, a two-way valve, a one-way valve, etc.

By adopting the pressure detection device designed by the application, the conduit comprises the starting air pressure pipe 140, the transfer air pressure pipe 150 and the tail air pressure pipe 160 which are arranged in sections, the starting air pressure pipe 140 is used for the first manifold 10, the second manifold 20 and the third manifold 130 to pass through, the transfer air pressure pipe 150 is used for the second manifold 20 and the third manifold 130 to pass through, the tail air pressure pipe 160 is used for the third manifold 130 to pass through, and the conduit is simple in structural design, reasonable in pipeline layout and convenient to store and maintain. The first catheter balloon 30 and the second catheter balloon 40 are two independent parts which do not affect each other, so that the pressure detection device has a more flexible working mode and can better feed back the working performance of the breathing machine. The tail end 52 of the first sleeve 50 and the top end 61 of the second sleeve 60 share one open-hole pipe plug 80, the structure is simplified, the cost is reduced, the second sleeve 60 is fixed conveniently by the aid of the arranged positioning piece 90, the second sleeve 60 is abutted to the open-hole pipe plug 80, the positioning piece 90 is detachably connected with the second sleeve 60, and assembly or maintenance of the pressure detection device is facilitated. The sealing performance of the first pipe cavity is guaranteed through the opening pipe plug 80 and the first sealing element 70, the sealing performance of the second pipe cavity is guaranteed through the opening pipe plug 80 and the second sealing element 100, and the detection accuracy of the pressure detection device is improved. Considering the problem of later maintenance and replacement of the catheter balloon, the first sealing element 70 is designed as a cone-shaped sealing element in the form of a circular truncated cone and a circular ring, and a larger through hole can be formed by utilizing the structural characteristics of the cone-shaped sealing element, so that the catheter balloon can conveniently pass through the first sealing element on the premise that the catheter balloon is not extruded and damaged.

The present application has been described with reference to specific examples, which are provided only to facilitate the understanding of the present application and are not intended to limit the present application. For a person skilled in the art to which the application pertains, several simple deductions, modifications or substitutions may be made according to the idea of the application.

Claims (12)

1. A pressure detection device, comprising: the catheter is inserted into the sleeve and forms a closed lumen with the sleeve, the catheter balloon is positioned in the lumen, and the lumen is used for communicating with a tested air chamber; one end of the catheter is communicated with the catheter balloon, the other end of the catheter is communicated with a pressure measurer, and the pressure measurer detects pressure change of the measured air chamber through the catheter balloon.

2. The pressure sensing device of claim 1, wherein the catheter comprises a first manifold, a second manifold, a first catheter balloon, and a second catheter balloon, wherein the first manifold is in communication with the first catheter balloon and the second manifold is in communication with the second catheter balloon through the first catheter balloon; the sleeve comprises a first sleeve and a second sleeve, the first catheter balloon is positioned in a first lumen formed by the first sleeve and the catheter, and the second catheter balloon is positioned in a second lumen formed by the second sleeve and the catheter; the measured air chamber comprises a first measured air chamber and a second measured air chamber, the first tube cavity is communicated with the first measured air chamber, and the second tube cavity is communicated with the second measured air chamber.

3. The pressure detecting apparatus according to claim 2, wherein the pressure measurer includes a first pressure measurer and a second pressure measurer; the first tested air chamber is used for simulating a chest cavity, and the second tested air chamber is used for simulating an abdominal cavity; one end of the first manifold is communicated with the first catheter balloon, the other end of the first manifold is used for being communicated with the first pressure measurer, and the first pressure measurer is used for measuring the pressure of the simulated chest cavity; one end of the second manifold is communicated with the second catheter balloon, the other end of the second manifold is communicated with the second pressure measurer, and the second pressure measurer is used for measuring the pressure of the simulated abdominal cavity.

4. The pressure sensing device of claim 3, wherein one end of the first sleeve is a head end and the other end is a tail end; one end of the second sleeve is a top end, and the other end of the second sleeve is a bottom end; the head end and the tail end of the first sleeve are both provided with a first sealing element and an open hole pipe plug, and the first sealing element is positioned between the open hole pipe plug and the end part of the first sleeve; the perforated pipe plug on the tail end is abutted against the top end, a positioning piece is arranged on the second sleeve, and the positioning piece is used for positioning and fixing the second sleeve; the first manifold passes through the open stopple and the first seal and is in communication with the first catheter balloon; the second manifold passes through the apertured plug, the seal, and the first catheter balloon and communicates with the second catheter balloon.

5. The pressure sensing device of claim 4, wherein the first sealing element is a conical sealing element, and a through hole is formed in the center of the first sealing element for allowing the first manifold and the second manifold to pass through; and two ends of the first sleeve are respectively provided with a support groove matched with the first sealing element in shape, and the first sealing element is arranged on the support grooves.

6. The pressure sensing device of claim 4, wherein a second seal is disposed between the apertured plug at the trailing end and the top end.

7. The pressure sensing device of claim 6 wherein said tip defines a detent, said second sealing member being positioned in said detent.

8. The pressure sensing device of claim 3, wherein a first communication structure is disposed on the first sleeve, the first communication structure being configured to communicate the first chamber under test with the first lumen; and a second communicating structure is arranged on the second sleeve and used for communicating the second tested air chamber with the second pipe cavity.

9. The pressure sensing device of claim 8, wherein the second communication structure comprises a first vent connector, an adapter tube, and a second vent connector; one end of the first ventilation joint is communicated with the second tube cavity, and the other end of the first ventilation joint is communicated with one end of the adapter tube; the other end of the adapter tube is communicated with one end of the second air joint, and the other end of the second air joint is communicated with the second measured air chamber.

10. The pressure sensing device of claim 8, wherein the catheter further comprises a third manifold passing through the first catheter balloon, the second catheter balloon, and the second communicating structure and into the second chamber under test, the third manifold for delivering nutrients to the second chamber under test.

11. The pressure sensing device of claim 10, wherein the conduit further comprises a starting pneumatic tube, a transit pneumatic tube, and a tail pneumatic tube; three channels are arranged in the starting air pressure pipe so that the first manifold, the second manifold and the third manifold can penetrate through the channels respectively, and the starting air pressure pipe is connected with the first catheter air bag; two channels are arranged in the transfer air pressure pipe so that the second manifold and the third manifold can penetrate through the transfer air pressure pipe respectively, and two ends of the transfer air pressure pipe are connected with the first catheter air bag and the second catheter air bag respectively; and a channel is formed in the tail pneumatic tube so that the third manifold can pass through the channel, and two ends of the tail pneumatic tube are respectively connected with the second catheter air bag and the second communication structure.

12. The pressure sensing device of claim 10, wherein the first manifold has a chest valve at an end thereof, the second manifold has a abdominal valve at an end thereof, and the third manifold has a feeding valve at an end thereof.

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