Ventilation parts, exhaust devices and water bag sheaths

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

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a breathable component, an exhaust device and a water bag sheath. Background Art

[0002] In modern interventional medicine, small ultrasound probes are a common method for diagnosing early-stage cancers and microtumors within human cavities. By stratifying the tissue wall, small ultrasound probes can easily identify the growth layers of intramural tumors. Tumors can be initially identified based on their origin, size, and echogenicity, and can be used to distinguish whether a protrusion is caused by a submucosal tumor or compression from an extramural lesion.

[0003] When using an intracavitary ultrasound probe, if the lesion is free of body fluids, saline or bubble-free water must be injected as an ultrasound transmission medium before ultrasound imaging can be performed for precise diagnosis and treatment. Ultrasound probes without a water capsule require continuous water injection during examination, which is inconvenient for the doctor and a burden for the patient. Uneven water injection can also affect the ultrasound probe's imaging quality, thereby compromising the doctor's diagnosis. Furthermore, the ultrasound probe must be cleaned and disinfected after each use, seriously reducing its service life and posing a risk of cross-infection.

[0004] Currently, existing ultrasound probes with water bladders include a three-way connector and an insertion sheath. The insertion sheath includes the water bladder and an outer sleeve for inserting the ultrasound probe. One end of the outer sleeve is connected to the three-way connector, and the other end of the outer sleeve is sealed. The outer sleeve has a plurality of through-holes. The water bladder is sealed to the outer sleeve and wrapped around the outer wall of the through-holes. When liquid is injected into the outer sleeve through the three-way connector, the liquid enters the water bladder through the through-holes, expanding the water bladder. However, during the water bladder expansion process, the water bladder needs to be vented simultaneously. This process takes a long time to vent the water bladder sheath, resulting in long preparation time for the examination and extremely inconvenient clinical use. Summary of the Invention

[0005] The main purpose of the present invention is to provide a breathable component, an exhaust device and a water bag sheath, aiming to improve the convenience of exhausting the water bag sheath of a small ultrasound probe to facilitate clinical use.

[0006] To achieve the above-mentioned object, the present invention provides a breathable member, comprising:

[0007] At least one layer of breathable membrane, used to allow air to pass through and prevent water from flowing through, wherein the material of the breathable membrane is at least one of medical PTFE, TPU, TPEE, PP, and PE;

[0008] The thickness of the air permeable member is 5 to 100 μm, the air permeability efficiency is 1 to 50 seconds, and the water pressure resistance is 22 to 100 KPa.

[0009] Optionally, the breathable component includes two stacked layers of breathable membranes, 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.

[0010] Optionally, the materials of the two breathable membranes are both 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.

[0011] Optionally, the breathable member includes a first breathable layer, a second breathable layer and a third breathable layer stacked sequentially from the inside to the outside.

[0012] Optionally, the air permeability efficiencies of the first air permeable layer, the second air permeable layer, and the third air permeable layer gradually increase.

[0013] Optionally, 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.

[0014] Optionally, 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 the same.

[0015] The present invention also provides an exhaust device, comprising:

[0016] Punch;

[0017] a concave mold connected to the convex mold and forming an exhaust channel; and

[0018] A breathable member is provided in the exhaust passages of the male mold and the female mold, and the breathable member comprises:

[0019] At least one layer of breathable membrane, used to allow air to pass through and prevent water from flowing through, wherein the material of the breathable membrane is at least one of medical PTFE, TPU, TPEE, PP, and PE;

[0020] The thickness of the air permeable member is 5 to 100 μm, the air permeability efficiency is 1 to 50 seconds, and the water pressure resistance is 22 to 100 KPa.

[0021] Optionally, 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.

[0022] The present invention further provides a water bag sheath tube, the water bag sheath tube comprising:

[0023] 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

[0024] As described above, the exhaust device is provided at the end of the water bag to allow the air in the water bag or the outer sleeve to pass through and to prevent the water in the water bag or the outer sleeve from flowing out.

[0025] Optionally, the length of the water bag is 10 to 30 mm.

[0026] Optionally, the water bag is fixed to the outer sleeve by bonding, and the water bag is bonded 3 to 5 mm from the end of the outer sleeve.

[0027] Optionally, the water bag sheath further comprises a connecting seat, the connecting seat being provided with a water inlet and a water outlet, the water inlet being suitable for connecting to a syringe, and the water outlet being connected to the outer sleeve.

[0028] Optionally, the connecting seat is a three-way connecting seat, which includes a connecting seat body and an outer sleeve locking ring and a probe locking ring provided on the connecting seat body. The water injection end of the outer sleeve is connected to the outer sleeve locking ring through a Luer joint, and the ultrasonic probe is connected to the outer sleeve locking ring.

[0029] The present invention has at least the following beneficial effects:

[0030] 1. In the technical solution of the present invention, the water balloon sheath comprises a sheath body and an exhaust device. The sheath body includes a water balloon and an outer sleeve. The water balloon is located at the insertion end of the outer sleeve, and 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 located at the end of the water balloon to allow air in the water balloon to pass through while preventing water from flowing out. This allows air in the water balloon to be discharged through the exhaust device, achieving real-time exhaust during the water balloon filling process. This improves the convenience of exhausting the water balloon sheath for small ultrasound probes and prevents water from flowing out, greatly facilitating clinical use.

[0031] 2. The exhaust device includes a male mold, a female mold and a breathable member. The male mold is connected to the female mold to form an exhaust channel. The breathable member is arranged in the exhaust channel to allow air to pass through and prevent water from flowing through, thereby achieving the function of exhausting air and preventing water from flowing out.

[0032] 3. The breathable element includes at least one layer of breathable membrane, which allows air to pass through but prevents water from flowing through. The membrane is made of at least one of medical-grade PTFE, TPU, TPEE, PP, and PE. The thickness of the breathable element is 5 to 100 μm, the air permeability is 1 to 50 seconds, and the water pressure resistance is 22 to 100 kPa. This ensures excellent ventilation and high toughness, effectively resisting water impact and significantly extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0034] Figure 1 This is a schematic structural diagram of an embodiment of a water bag sheath tube of the present invention;

[0035] Figure 2 This is a schematic structural diagram of the end portion of a water bag sheath tube in one embodiment of the water bag sheath tube of the present invention;

[0036] Figure 3 This is a schematic structural diagram of an embodiment of an exhaust device of the present invention;

[0037] Figure 4 is a cross-sectional view of an embodiment of a breathable member of the present invention;

[0038] Figure 5 is a cross-sectional view of another embodiment of the breathable member of the present invention;

[0039] Figure 6 This is a cross-sectional view of another embodiment of the breathable element of the present invention.

[0040] Description of Figure Numbers:

[0041] 10. Sheath body; 20. Exhaust device; 30. Spring tube and transducer; 40. Connecting seat; 50. Syringe; 11. Water bag; 12. Outer sleeve; 20a. Exhaust channel; 41. Connecting seat body; 42. Outer sleeve locking ring; 43. Probe locking ring; 44. Luer connector; 45. Three-way valve; 411. Water inlet; 21. Punch; 22. Die; 23. Breathable part; 231. Breathable membrane; 201. First breathable layer; 202. Second breathable layer; 203. Third breathable layer.

[0042] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0044] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0045] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] The present invention provides a water bag sheath tube, which can be applicable to a small ultrasonic probe, but is not limited here.

[0047] refer to Figure 1 and Figure 2 In one embodiment of the present invention, the water bag sheath includes a sheath body 10 and an exhaust device 20; the sheath body 10 includes a water bag 11 and an outer sleeve 12, the water bag 11 is arranged at the insertion end of the outer sleeve 12, and the other end of the outer sleeve 12 is suitable for water injection, and the outer sleeve 12 is provided with a channel, in which a spring tube and a transducer 30 connected together are arranged. The spring tube and the transducer 30 rotate in the channel under the action of the driving device to complete ultrasonic detection; the water bag 11 can be set at a position opposite to the transducer, and the exhaust device 20 is provided at the end of the water bag 11 to allow air in the water bag 11 or the outer sleeve 12 to pass through and prevent water in the water bag 11 or the outer sleeve 12 from flowing out.

[0048] The length of the water bladder 11 can be 10 to 30 mm for ease of operation. The water bladder 11 and the outer tube 12 can be secured by bonding, with the water bladder 11 bonded 3 to 5 mm from the end of the outer tube 12. The materials of the water bladder 11 and the outer tube 12 that contact the mucosa are both specialty medical polymer materials, which are not specifically limited here.

[0049] In this embodiment, the exhaust device 20 can be fixed to the inside of the water bag 11 or the outer sleeve 12 by glue. The exhaust device 20 is located on the outside of the water bag 11 and is connected to the channel of the outer sleeve 12. The exhaust device 20 can ensure that air can pass through but water cannot pass through. During the water injection process, water can enter the water bag 11 evenly, and the air in the outer sleeve 12 and the water bag 11 is discharged through the exhaust device 20, while the water remains in the outer sleeve 12 and the water bag 11. The water bag 11 is self-expanding. The more water there is, the larger the water bag 11 is. After the water bag 11 is filled with water and expanded, its shape is circular. The size of the water bag 11 can be freely controlled according to actual needs.

[0050] It is understandable that the present invention provides an exhaust device 20 so that the air in the water bag 11 can be exhausted through the exhaust device 20, and the exhaust device 20 can prevent the water in the water bag 11 from flowing out. During the water filling process of the water bag 11, a real-time exhaust operation is achieved, which improves the convenience of exhausting the water bag sheath of the small ultrasound probe, greatly facilitates clinical use, and successfully solves the technical problems of long preparation time and complicated operation of the water bag sheath set consumables before examination, and solves the problems of inconvenience in operation and poor image effect caused by long exhaust time and incomplete exhaust of the water bag sheath, which has great clinical significance. The design of the exhaust device 20 means that when using the water bag sheath set, the doctor no longer needs to suction and exhaust multiple times. Instead, he only needs to slowly fill the water bag, and the air in the set will be exhausted from the exhaust device 20 at the tip of the water bag 11, which greatly simplifies the exhaust operation and saves a lot of time. Current products all require multiple exhaust operations.

[0051] Please refer to Figure 1 In one embodiment, the water bag sheath may further include a connecting seat 40, which is provided with a water inlet 411 and a water outlet. The water inlet 411 is adapted to be connected to the syringe 50, and the water outlet is connected to the outer sleeve 12. A three-way valve 45 may be installed at the water outlet end of the syringe 50.

[0052] In this embodiment, the connecting seat 40 is a three-way connecting seat, which includes a connecting seat body 41 and an outer sleeve locking ring 42 and a probe locking ring 43 provided on the connecting seat body 41. The water injection end of the outer sleeve 12 is connected to the outer sleeve locking ring 42 through a Luer joint 44, and the spring tube of the ultrasonic probe is connected to the probe locking ring 43.

[0053] The present invention further provides an exhaust device 20 , which can be applied to the above-mentioned water bag sheath tube, but is not limited here.

[0054] refer to Figure 3 In one embodiment of the present invention, the exhaust device 20 includes a male mold 21, a female mold 22 and a breathable member 23. The male mold 21 is connected to the female mold 22 to form an exhaust channel 20a. The breathable member 23 is arranged in the exhaust channel 20a of the male mold 21 and the female mold 22 to allow air to pass through and prevent water from flowing through, thereby achieving the function of exhausting air and preventing water from flowing out.

[0055] The male mold 21 is a "convex"-shaped cylindrical structure, and the female mold 22 is a "concave"-shaped cylindrical structure. The two can be spliced and fixed by gluing or other methods. The upper and lower ends of the air permeable member 23 can be clamped at the splice of the male mold 21 and the female mold 22. In other embodiments, the female mold 22 can be provided with an internal thread and the male mold 21 can be provided with an external thread, and the two can be fixed by a threaded connection, etc.

[0056] In this embodiment, the material of the male mold 21 can be at least one of medical PC, PP, and PA; and / or the material of the female mold 22 can be at least one of medical PC, PP, and PA. This makes the exhaust device 20 more durable and easier to manufacture.

[0057] In addition, the materials selected are all medical materials, which are friendly to the human body, and the processing technology of the various components of the exhaust device 20 is simple, the production cost is low, the yield rate is high, and the stability is good.

[0058] It should be noted that in some other embodiments, the punch 21 and the die 22 can also be replaced by a single component with an exhaust channel 20a, and the breathable member 23 can be vertically installed in the exhaust channel 20a. This solution also falls within the scope of protection requested by the present invention, and does not limit the specific structure of the main body of the exhaust device 20.

[0059] In order to achieve a better ventilation effect for the exhaust device 20 and realize the function of preventing water from flowing through, the present invention further proposes a new ventilation member 23.

[0060] refer to Figures 4 to 6 In one embodiment of the present invention, the breathable member 23 includes at least one layer of breathable membrane 231. The breathable member 23 is used to allow air to pass through and prevent water from flowing through. The material of the breathable membrane 231 can be at least one of medical PTFE, TPU, TPEE, PP, and PE. The overall thickness of the breathable member 23 can be 5 to 100 μm, the air permeability efficiency (unit gas permeation time) can be 1 to 50 seconds, and the water pressure resistance can be 22 to 100 KPa.

[0061] When the breathable membrane 231 has a multi-layer structure, it can be manufactured using methods such as heat-pressing. Different processes can be used for different breathable membrane materials 231. By leveraging the physical and chemical properties of different materials, a multi-layer breathable membrane 231 with high strength (pressure resistance), high air permeability, and ease of assembly can be formed. It is understood that each layer can be made of breathable materials with different air permeabilities to ensure both air permeability efficiency and the ability to prevent water from passing through the breathable membrane 231 under a certain water pressure.

[0062] In addition, the matching design of the multi-layer breathable membrane 231 can match the usage requirements of different sheath tube pore diameters and different water injection pressures, ensuring the exhaust efficiency in different application scenarios.

[0063] The breathable member 23 of the present invention features high air permeability and high pressure resistance, meeting the pressure resistance and high air permeability requirements during water injection into the sheath. While water is being injected, the gas within the sheath is simultaneously discharged through the exhaust device 20 to the outer tube 12 and water bladder 11. This eliminates the need for separate exhaust in existing designs, simplifies the operational process, and significantly improves work efficiency. The use of the breathable membrane 231 for exhaust ensures that after the water bladder 11 is expanded, there are no bubbles of any size inside the bladder 11, thus ensuring the stability and accuracy of ultrasonic imaging.

[0064] In one embodiment, if Figure 5 As shown, the breathable member 23 is a double-layer structure, including two stacked breathable membranes 231, and the toughness of the breathable membrane 231 located in the inner layer may be greater than the toughness of the breathable membrane 231 located in the outer layer, and the breathable efficiency of the breathable membrane 231 located in the outer layer may be greater than the breathable efficiency of the breathable membrane 231 located in the inner layer.

[0065] It should be noted that the inner layer mentioned above and below refers to the inner breathable layer close to the water bag 11 , and the outer layer refers to the outer breathable layer away from the water bag 11 .

[0066] In this embodiment, the material of both breathable membranes 231 can be PTFE, and the breathable membrane 231 located in the inner layer has a breathability efficiency of 10-20s and a thickness of 5-10um, while the breathable membrane 231 located in the outer layer has a breathability efficiency of 1-5s and a thickness of 3-5um.

[0067] Preferably, the air permeability of the inner breathable film 231 may be 20s and the thickness may be 10um, and the air permeability of the outer breathable film 231 may be 1s and the thickness may be 5um.

[0068] Among them, the PTFE breathable membrane 231 has good toughness and high air permeability efficiency, while the single-layer breathable membrane 231 is easy to break. Therefore, a double-layer PTFE structure is adopted. The inner layer is selected from the PTFE breathable membrane 231 with average air permeability efficiency but better toughness, and the outer layer is selected from the PTFE breathable membrane 231 with high air permeability efficiency.

[0069] In order to further improve the toughness and ventilation efficiency of the breathable member 23 and increase its service life, in some embodiments, the breathable member 23 adopts a three-layer structure, and the breathable member 23 includes a first breathable layer 201, a second breathable layer 202 and a third breathable layer 203 stacked in sequence from the inside to the outside.

[0070] In one embodiment, if Figure 5 As shown, the air permeability of the first air permeable layer 201, the second air permeable layer 202 and the third air permeable layer 203 can be gradually increased to improve the air permeability while ensuring that water does not flow out.

[0071] In this embodiment, the material of the first breathable layer 201 is PTFE, the material of the second breathable layer 202 is TPU, and the material of the third breathable layer 203 is PP; the thickness and breathability efficiency of the first breathable layer 201, the second breathable layer 200 and the third breathable layer 203 are the same.

[0072] Preferably, the first breathable layer 201 has a permeability efficiency of 15s and a thickness of 5um, the second breathable layer 202 has a permeability efficiency of 10s and a thickness of 5um, and the third breathable layer 203 has a permeability efficiency of 1s and a thickness of 5um.

[0073] Among them, PTFE breathable membrane is the inner layer, TPU breathable membrane is the middle layer, and PP breathable membrane is the outer layer. By utilizing the characteristics of high viscosity and low melting temperature of TPU combined with the inner and outer layer materials, the air permeability of the three layers gradually increases from the inside to the outside, which not only retains the strength of PP breathable membrane, but also has the good toughness and air permeability of PTFE material.

[0074] In another embodiment, Figure 6 As shown, the material of the first breathable layer 201 can be PTFE, the material of the second breathable layer 202 can be TPU, and the material of the third breathable layer 203 can be PTFE.

[0075] In this embodiment, the air permeability efficiency of the first air permeable layer 201 , the second air permeable layer 202 and the third air permeable layer 203 are all 1s and the thickness is 5 μm.

[0076] The breathable member 23 adopts a three-layer structure with high toughness and high air permeability, and forms a breathable membrane 231 by hot pressing. This structure is mainly used in situations where the air holes of exhaust or ventilation devices are very small (less than 3mm in diameter).

[0077] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present description and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A water balloon sheath, characterized in that: include: 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. as well as an exhaust device, the exhaust device being provided at an end of the water bag to allow air in the water bag or the outer tube to pass through and to 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 according to claim 1, characterized in that: The breathable component includes two stacked breathable membrane layers, the toughness of the inner breathable membrane is greater than that of the outer breathable membrane, and the breathable efficiency of the outer breathable membrane is greater than that of the inner breathable membrane.

3. The water bag sheath according to claim 2, characterized in that: The materials of the two breathable membranes are both PTFE, and the breathable membrane located in the inner layer has a breathability efficiency of 10-20s and a thickness of 5-10um, and the breathable membrane located in the outer layer has a breathability 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 which are stacked in sequence from the inside to the outside.

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

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 bag sheath according to claim 4, 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 bag 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 according to claim 1, characterized in that: The exhaust device is fixed on the inner wall of the outer sleeve.

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