CN116098647B

CN116098647B - Breathable piece, exhaust device and water sac sheath tube

Info

Publication number: CN116098647B
Application number: CN202211600564.XA
Authority: CN
Inventors: 梁胜; 黄炜; 吴伟文; 白晓淞
Original assignee: Innermedical Co ltd
Current assignee: Innermedical Co ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2025-08-12
Anticipated expiration: 2042-12-12
Also published as: CN116098647A

Abstract

The present invention discloses a breathable member, an exhaust device and a water bag sheath tube. The breathable member includes at least one layer of breathable membrane, and the breathable member is used to allow air to pass through and prevent water from flowing through. The exhaust device includes a punch, a die and a breathable member. The punch is connected to the die and forms an exhaust channel. The breathable member is arranged in the exhaust channel. The water bag sheath tube includes a sheath tube body and an exhaust device. The sheath tube body includes a water bag and an outer sleeve. The water bag is arranged at the insertion end of the outer sleeve. The other end of the outer sleeve is suitable for water injection. The outer sleeve is provided with a channel for inserting an ultrasound probe. The exhaust device is arranged at the end of the water bag to allow air in the water bag to pass through and prevent water in the water bag from flowing out. The present invention proposes a breathable member and an exhaust device having the same, which achieves a better waterproof and breathable effect, improves the structure of the water bag sheath tube, reduces the exhaust time of the water bag sheath tube, and exhausts more thoroughly, thereby improving the convenience of operation and enhancing the image effect.

Description

Breathable piece, exhaust device and water sac sheath tube

Technical Field

The invention relates to the technical field of medical instruments, in particular to a ventilation member, an exhaust device and a water sac sheath tube.

Background

In modern interventional medical diagnosis and treatment, the small ultrasonic probe is a common method for diagnosing early canceration, tiny tumor and other lesions of tissues in a human body cavity at present. The small ultrasonic probe can easily distinguish the growth level of the tumor in the wall by layering the human tissue wall, can preliminarily judge the tumor property by the origin level, the size, the echo characteristics and the like of the tumor, and can identify whether the bulge is caused by submucosal tumor or the compression of the lesions outside the wall.

When the intracavity ultrasonic small probe is used, if no body fluid exists at a lesion part, physiological saline or bubble-free water is required to be injected as an ultrasonic conduction medium, then ultrasonic imaging can be carried out, accurate diagnosis and treatment are realized, continuous water injection is required during examination, and the operation of doctors is inconvenient and is also a burden for patients. And the uneven water injection can also influence the imaging effect of the small ultrasonic probe, thereby influencing the diagnosis of doctors. And the small ultrasonic probe needs to be cleaned and disinfected after each use, so that the service life of the small ultrasonic probe is seriously influenced, and the risk of cross infection is also caused.

At present, the existing small ultrasonic probe with the water sac comprises a three-way connecting seat and an insertion sheath pipe, wherein the insertion sheath pipe comprises the water sac and an outer sleeve pipe for inserting the small ultrasonic probe, one end of the outer sleeve pipe is connected with the three-way connecting seat, the end part of the other end of the outer sleeve pipe is closed, a plurality of through holes are formed in the pipe wall of the outer sleeve pipe, the water sac is connected to the outer sleeve pipe in a sealing mode and wraps the outer portion of the pipe wall with the through holes, and when liquid is injected into the pipe of the outer sleeve pipe through the three-way connecting seat, the liquid enters the water sac through the through holes, so that the water sac is expanded. However, in the water bag expanding process, the air exhausting operation needs to be performed simultaneously, the air exhausting operation time of the water bag sheath tube is long, the examination preparation time is long, and the clinical use is extremely inconvenient.

Disclosure of Invention

The invention mainly aims to provide a ventilation piece, an exhaust device and a water sac sheath tube, and aims to improve the convenience of exhaust of the water sac sheath tube of an ultrasonic small probe so as to facilitate clinical use.

To achieve the above object, the present invention provides a ventilation member, including:

At least one breathable film for allowing air to pass through and preventing water from flowing through, wherein the breathable film is made of at least one of medical PTFE, TPU, TPEE, PP, PE;

the thickness of the ventilation piece is 5-100 um, the ventilation efficiency is 1-50 s, and the water pressure resistance is 22-100 KPa.

Optionally, the breathable piece comprises two layers of breathable films which are arranged in a laminated mode, the toughness of the breathable film located on the inner layer is larger than that of the breathable film located on the outer layer, and the breathable efficiency of the breathable film located on the outer layer is larger than that of the breathable film located on the inner layer.

Optionally, the materials of the two breathable films are PTFE, the breathable efficiency of the breathable film positioned on the inner layer is 10-20s, the thickness of the breathable film is 5-10um, the breathable efficiency of the breathable film positioned on the outer layer is 1-5s, and the thickness of the breathable film is 3-5um.

Optionally, the ventilation member includes a first ventilation layer, a second ventilation layer, and a third ventilation layer sequentially stacked from inside to outside.

Optionally, the ventilation efficiency of the first, second and third ventilation layers increases gradually.

Optionally, the material of the first air-permeable layer is PTFE, the material of the second air-permeable layer is TPU, and the material of the third air-permeable layer is PP.

Optionally, the material of the first air-permeable layer is PTFE, the material of the second air-permeable layer is TPU, the material of the third air-permeable layer is PTFE, and the thickness and air-permeable efficiency of the first air-permeable layer, the second air-permeable layer and the third air-permeable layer are the same.

The invention also proposes an exhaust device comprising:

A male die;

A female die connected with the male die and forming an exhaust passage, and

The ventilation piece, the ventilation piece is located the terrace die with in the exhaust passage of die, the ventilation piece includes:

Optionally, the male die is made of at least one of medical PC, PP and PA, and/or the female die is made of at least one of medical PC, PP and PA.

The invention also provides a water sac sheath tube, which comprises:

The sheath tube body comprises a water sac and an outer sleeve, wherein the water sac is arranged at the insertion end of the outer sleeve, the other end of the outer sleeve is suitable for water injection, the outer sleeve is provided with a channel, a spring tube and a transducer which are connected together are arranged in the channel, the spring tube and the transducer rotate in the channel under the action of a driving device to complete ultrasonic detection, and

An air exhaust device as described above, provided at an end of the water bladder for allowing air in the water bladder or the outer sleeve to pass therethrough and preventing water in the water bladder or the outer sleeve from flowing out.

Optionally, the length of the water bag is 10-30 mm.

Optionally, the water bag is fixed with the outer sleeve through bonding, and the water bag is bonded at the position of 3-5 mm of the end part of the outer sleeve.

Optionally, the water sac sheath tube further comprises a connecting seat, the connecting seat is provided with a water injection port and a water outlet, the water injection port is suitable for being communicated with the injector, and the water outlet is communicated with the outer sleeve.

Optionally, the connecting seat is a three-way connecting seat, the three-way connecting seat comprises a connecting seat main body, an outer sleeve locking ring and a probe locking ring, wherein the outer sleeve locking ring and the probe locking ring are arranged on the connecting seat main body, a water injection end of the outer sleeve is connected with the outer sleeve locking ring through a luer connector, and the ultrasonic probe is connected with the outer sleeve locking ring.

The invention has at least the following beneficial effects:

1. The water bag sheath tube comprises a sheath tube body and an exhaust device, wherein the sheath tube body comprises a water bag and an outer sleeve, the water bag is arranged at the insertion end of the outer sleeve, the other end of the outer sleeve is suitable for water injection, a channel for inserting an ultrasonic probe is formed in the outer sleeve, and the exhaust device is arranged at the end part of the water bag and used for allowing air in the water bag to pass through and preventing water in the water bag from flowing out. Therefore, the air in the water bag can be discharged through the air discharge device, the real-time air discharge operation is realized in the water filling process of the water bag, the air discharge convenience of the water bag sheath tube of the small ultrasonic probe is improved, the water in the water bag can be prevented from flowing out, and the clinical use is greatly facilitated.

2. The exhaust device comprises a male die, a female die and an air permeable member, wherein the male die is connected with the female die and forms an exhaust channel, and the air permeable member is arranged in the exhaust channel and is used for allowing air to pass through and preventing water from flowing through, so that the functions of exhausting air and preventing water from flowing out are realized.

3. The breathable piece comprises at least one layer of breathable film, the breathable piece is used for allowing air to pass through and preventing water from flowing through, the breathable film is made of at least one of medical PTFE, TPU, TPEE, PP, PE um, the thickness of the breathable piece is 5-100 um, the breathable efficiency is 1-50 s, and the water pressure resistance is 22-100 KPa. Therefore, the ventilation piece has good ventilation effect and high toughness, can effectively resist the impact of water flow, and greatly prolongs the service life.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a water sac sheath according to one embodiment of the present invention;

FIG. 2 is a schematic view of the structure of the end of the water bladder sheath according to an embodiment of the present invention;

FIG. 3 is a schematic view of an embodiment of an exhaust apparatus according to the present invention;

FIG. 4 is a cross-sectional view of one embodiment of a vapor permeable member of the present invention;

FIG. 5 is a cross-sectional view of another embodiment of a vapor permeable member of the present invention;

Fig. 6 is a cross-sectional view of a further embodiment of the venting member of the present invention.

Reference numerals illustrate:

10. Sheath body, 20, exhaust device, 30, spring tube and transducer, 40, connection seat, 50, injector, 11, water sac, 12, outer sleeve, 20a, exhaust channel, 41, connection seat body, 42, outer sleeve locking ring, 43, probe locking ring, 44, luer connector, 45, three-way valve, 411, water injection port, 21, male die, 22, female die, 23, ventilation piece, 231, ventilation membrane, 201, first ventilation layer, 202, second ventilation layer, 203, third ventilation layer.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear are referred to in the embodiments of the present invention), the directional indications are merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides a water sac sheath tube which can be applied to an ultrasonic small probe, and is not limited in the place.

Referring to fig. 1 and 2, in an embodiment of the present invention, the water bag sheath tube comprises a sheath tube body 10 and an exhaust device 20, wherein the sheath tube body 10 comprises a water bag 11 and an outer sleeve 12, the water bag 11 is arranged at the insertion end of the outer sleeve 12, the other end of the outer sleeve 12 is suitable for water injection, the outer sleeve 12 is provided with a channel, a spring tube and a transducer 30 which are connected together are arranged in the channel, the spring tube and the transducer 30 rotate in the channel under the action of a driving device to complete ultrasonic detection, the water bag 11 can be arranged at a position opposite to the transducer, and the exhaust device 20 is arranged at the end of the water bag 11 and used for allowing air in the water bag 11 or the outer sleeve 12 to pass through and preventing water in the water bag 11 or the outer sleeve 12 from flowing out.

The length of the water bag 11 can be 10-30 mm, so that the operation is convenient. The water bag 11 and the outer sleeve 12 can be fixed through bonding, and the water bag 11 can be bonded at the position of 3-5 mm at the end part of the outer sleeve 12. The materials of the water bag 11 and the outer sleeve 12 contacting the mucous membrane are special medical polymer materials, and the materials are not particularly limited.

In this embodiment, the air exhaust device 20 can be embedded and fixed in the water bag 11 or the inside of the outer sleeve 12 through glue, the air exhaust device 20 is located at the outer side of the water bag 11 and is communicated with the channel of the outer sleeve 12, the air exhaust device 20 can ensure that air can pass through but water can not pass through, in the water injection process, water can uniformly enter the water bag 11, the air in the outer sleeve 12 and the water bag 11 is exhausted through the air exhaust device 20, and the water stays in the outer sleeve 12 and the water bag 11, the water bag 11 is self-expanding, the more the water quantity is, the larger the water bag 11 is, the water bag 11 is circular after being injected and expanded, and the size of the water bag 11 can be freely controlled according to actual requirements.

It can be understood that by arranging the exhaust device 20, the air in the water bag 11 can be exhausted through the exhaust device 20, and the exhaust device 20 can prevent water in the water bag 11 from flowing out, so that real-time exhaust operation is realized in the water filling process of the water bag 11, the convenience of exhausting the water bag sheath tube of the small ultrasonic probe is improved, the clinical use is greatly facilitated, the technical problems of long preparation time and complex operation of the water bag sheath tube packaging consumable before inspection are successfully solved, the problems of inconvenient operation and poor image effect caused by long exhaust time and incomplete exhaust of the water bag sheath tube are solved, and the method has great clinical significance. The design of the air exhaust device 20 makes the doctor not need to suck and exhaust for many times when using the water sac sheath tube set, only needs to slowly inject water, and the air in the set is exhausted from the air exhaust device 20 at the tip of the water sac 11, so that the air exhaust operation is extremely simplified, a large amount of time is saved, and the current products all need to exhaust for many times.

Referring mainly to fig. 1, in an embodiment, the water bag sheath tube may further include a connection seat 40, where the connection seat 40 is provided with a water filling port 411 and a water outlet, and the water filling port 411 is adapted to communicate with the syringe 50, and the water outlet is communicated with the outer sleeve 12. Wherein, the water outlet end of the injector 50 can be provided with a three-way valve 45.

In this embodiment, the connection seat 40 is a three-way connection seat, which includes a connection seat body 41, an outer sleeve locking ring 42 and a probe locking ring 43 disposed on the connection seat body 41, the water injection end of the outer sleeve 12 is connected with the outer sleeve locking ring 42 through a luer connector 44, and the spring tube of the ultrasonic probe is connected with the probe locking ring 43.

The present invention also proposes an exhaust device 20 applicable to the water bladder sheath tube described above, which is not limited thereto.

Referring to fig. 3, in an embodiment of the present invention, the air discharging device 20 includes a male die 21, a female die 22, and an air permeable member 23, wherein the male die 21 is connected with the female die 22 and forms an air discharging passage 20a, and the air permeable member 23 is disposed in the air discharging passages 20a of the male die 21 and the female die 22 for allowing air to pass through and blocking water flowing therethrough, thereby achieving the functions of discharging air and blocking water flowing out.

The male die 21 is in a 'convex' cylindrical structure, the female die 22 is in a 'concave' cylindrical structure, the male die 21 and the female die 22 can be spliced and fixed in a glue bonding mode, and the upper end and the lower end of the ventilation piece 23 can be clamped at the splicing position of the male die 21 and the female die 22. In other embodiments, the female die 22 may be provided with internal threads, the male die 21 may be provided with external threads, both may be secured by threaded connection, etc.

In this embodiment, the material of the male die 21 may be at least one of medical PC, PP, PA, and/or the material of the female die 22 may be at least one of medical PC, PP, PA. Thus, the exhaust device 20 can be more durable and can be manufactured conveniently.

In addition, the materials selected are medical materials and parent bodies, and the processing technology of each part of the exhaust device 20 is simple, the production cost is low, the yield is high, and the stability is good.

It should be noted that, in some other embodiments, the male die 21 and the female die 22 may be replaced by a single component having the air discharge channel 20a, and the air permeable member 23 may be vertically installed in the air discharge channel 20a, which falls within the scope of the present invention, and the specific structure of the main body of the air discharge device 20 is not limited.

In order to achieve a better ventilation effect of the exhaust device 20 and to achieve the function of preventing water from flowing through, the invention also provides a novel ventilation piece 23.

Referring to fig. 4 to 6, in an embodiment of the invention, the ventilation member 23 includes at least one ventilation film 231, the ventilation member 23 is used for allowing air to pass through and preventing water from flowing through, the material of the ventilation film 231 may be at least one of medical PTFE, TPU, TPEE, PP, PE, the overall thickness of the ventilation member 23 may be 5-100 um, the ventilation efficiency (unit gas permeation time) may be 1-50 s, and the water pressure resistance may be 22-100 kpa.

When the air-permeable film 231 has a multilayer structure, it can be manufactured by hot press bonding or the like, and the air-permeable films 231 of different materials are subjected to different processes, and are combined into the multilayer air-permeable film 231 having high strength (pressure resistance), high air-permeable efficiency, and easy assembly by the physicochemical properties of the different materials. It will be appreciated that each layer may be made of a breathable material having a different amount of breathability, which ensures both a breathable efficiency and a water-impermeable membrane 231 at a certain water pressure.

And, the supporting design of multilayer ventilated membrane 231 can match the user demand of different sheath apertures, different water injection pressure, has guaranteed the exhaust efficiency under the different application scenes.

The ventilation member 23 of the present invention has high ventilation property and high pressure resistance, and meets the requirements of pressure resistance and high ventilation property when water is injected into the sheath. The water injection is realized, and the gas in the sheath tube is discharged out of the outer sleeve 12 and the water bag 11 through the exhaust device 20, so that the operation of independent exhaust in the existing design is omitted, the operation flow is simplified, and the working efficiency is greatly improved. The ventilation membrane 231 is adopted for exhausting, so that no large bubbles and small bubbles exist in the water bag 11 after the water bag 11 is expanded, and the stability and the accuracy of ultrasonic imaging can be ensured.

In an embodiment, as shown in fig. 5, the ventilation member 23 has a double-layer structure, including two layers of ventilation films 231 stacked, and the toughness of the ventilation film 231 located in the inner layer may be greater than that of the ventilation film 231 located in the outer layer, and the ventilation efficiency of the ventilation film 231 located in the outer layer may be greater than that of the ventilation film 231 located in the inner layer.

The inner layer mentioned above and hereinafter refers to the inner ventilation layer near the water bladder 11, and the outer layer refers to the outer ventilation layer far from the water bladder 11.

In this embodiment, the material of the two air permeable membranes 231 may be PTFE, and the air permeable efficiency of the air permeable membrane 231 located in the inner layer is 10-20s, the thickness is 5-10um, the air permeable efficiency of the air permeable membrane 231 located in the outer layer is 1-5s, and the thickness is 3-5um.

Preferably, the ventilation efficiency of the ventilation film 231 located at the inner layer may be 20s and the thickness of 10um, and the ventilation efficiency of the ventilation film 231 located at the outer layer may be 1s and the thickness of 5um.

Among them, the PTFE gas permeable membrane 231 has good toughness and high gas permeability, and the single-layer gas permeable membrane 231 is easily broken, so that the double-layer PTFE structure is adopted, the inner layer selects the PTFE gas permeable membrane 231 having general gas permeability but better toughness, and the outer layer selects the PTFE gas permeable membrane 231 having high gas permeability.

To further improve the toughness and ventilation efficiency of the ventilation member 23 and improve the service life, in some embodiments, the ventilation member 23 adopts a three-layer structure, and the ventilation member 23 includes a first ventilation layer 201, a second ventilation layer 202, and a third ventilation layer 203 sequentially stacked from inside to outside.

In one embodiment, as shown in fig. 5, the ventilation efficiency of the first, second and third ventilation layers 201, 202 and 203 may be gradually increased to ensure that water does not flow out while improving the ventilation.

In this embodiment, the material of the first air-permeable layer 201 is PTFE, the material of the second air-permeable layer 202 is TPU, the material of the third air-permeable layer 203 is PP, and the thickness and air-permeable efficiency of the first air-permeable layer 201, the second air-permeable layer 200, and the third air-permeable layer 203 are all the same.

Preferably, the air permeability of the first air permeable layer 201 is 15s and the thickness is 5um, the air permeability of the second air permeable layer 202 is 10s and the thickness is 5um, and the air permeability of the third air permeable layer 203 is 1s and the thickness is 5um.

Wherein, PTFE ventilated membrane is the inlayer, TPU ventilated membrane is the intermediate level, PP ventilated membrane is the skin, utilizes TPU's high viscosity, the low characteristic of fusing temperature to combine inner and outer layer material, and the ventilative efficiency of three-layer ventilated layer from inside to outside increases gradually, has both kept the intensity of PP ventilated membrane, has good toughness and the ventilation effect of PTFE material again

In another embodiment, as shown in fig. 6, the material of the first air-permeable layer 201 may be PTFE, the material of the second air-permeable layer 202 is TPU, and the material of the third air-permeable layer 203 is PTFE.

In this embodiment, the air permeation efficiency of each of the first air permeation layer 201, the second air permeation layer 202, and the third air permeation layer 203 is 1s and the thickness is 5um.

The ventilation member 23 adopts a three-layer structure with high toughness and high air permeability, and forms a ventilation film 231 in a hot-pressing mode, and the structure is mainly used in the case that ventilation holes of an exhaust or ventilation device are very small (the diameter is less than 3 mm).

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. A water bag sheath, comprising:

The sheath body includes a water bag and an outer sleeve. The water bag is provided at the insertion end of the outer sleeve. The other end of the outer sleeve is suitable for water injection. The outer sleeve is provided with a channel. A spring tube and a transducer connected together are provided in the channel. The spring tube and the transducer rotate in the channel under the action of a driving device to complete ultrasonic detection; and

An exhaust device is provided at the end of the water bag to allow air in the water bag or the outer tube to pass through and prevent water in the water bag or the outer tube from flowing out; the exhaust device comprises:

Punch;

a concave mold connected to the convex mold and forming an exhaust channel; and

A breathable member is provided in the exhaust channels of the male mold and the female mold; the breathable member includes at least one layer of breathable membrane for allowing air to pass through and preventing water from flowing through, and the material of the breathable membrane is at least one of medical PTFE, TPU, TPEE, PP, and PE; the breathable member has a thickness of 5 to 100 μm, an air permeability efficiency of 1 to 50 seconds, and a water pressure resistance of 22 to 100 kPa.

2. The water bag sheath tube according to claim 1 is characterized in that the breathable component includes two layers of breathable membranes stacked together, and the toughness of the breathable membrane located in the inner layer is greater than the toughness of the breathable membrane located in the outer layer, and the breathable efficiency of the breathable membrane located in the outer layer is greater than the breathable efficiency of the breathable membrane located in the inner layer.

3. The water bag sheath tube according to claim 2 is characterized in that the material of the two breathable membranes is PTFE, and the breathable membrane located in the inner layer has a breathable efficiency of 10-20s and a thickness of 5-10um, and the breathable membrane located in the outer layer has a breathable efficiency of 1-5s and a thickness of 3-5um.

4. The water bag sheath according to claim 1, characterized in that the breathable member includes a first breathable layer, a second breathable layer and a third breathable layer stacked in sequence from the inside to the outside.

5. The water bag sheath according to claim 4, characterized in that the air permeability efficiency of the first air permeable layer, the second air permeable layer and the third air permeable layer gradually increases.

6. The water bag sheath according to claim 5, characterized in that the material of the first breathable layer is PTFE, the material of the second breathable layer is TPU, and the material of the third breathable layer is PP.

7. The water balloon sheath according to claim 4 is characterized in that the material of the first breathable layer is PTFE, the material of the second breathable layer is TPU, and the material of the third breathable layer is PTFE; the thickness and breathability efficiency of the first breathable layer, the second breathable layer and the third breathable layer are all the same.

8. The water balloon sheath according to claim 1, characterized in that the material of the male mold is at least one of medical PC, PP, and PA; and/or the material of the female mold is at least one of medical PC, PP, and PA.

9. The water bag sheath tube according to claim 1, characterized in that the exhaust device is fixed on the inner wall of the outer sleeve.