Self-adjusting chest drainage tube

Abstract

The invention relates to a self-adjusting thoracic cavity drainage tube which comprises a drainage tube body with a drainage main channel; the drainage tube body comprises a plurality of drainage sub-tubes, the plurality of drainage sub-tubes are uniformly distributed around the axis of the drainage tube body, and each drainage sub-tube is provided with a drainage sub-channel; each drainage sub-tube comprises an expansion section, a deformation section and a drainage section which are sequentially arranged from the far end to the near end, and the multiple expansion sections and the multiple deformation sections jointly define an expansion part; the drainage main channel is defined by the plurality of drainage sections; during use, from the direction of the far end to the direction of the near end, the cross section area of the internal space of the expansion part is gradually reduced until the cross section area is the same as the cross section area of the drainage main channel. Hydrops in the thoracic cavity are drained through cooperation of the drainage main channel and the drainage sub-channels, and the drainage speed is increased. The risk that blood forms blood clots to block the drainage main channel or the drainage sub-channel can be reduced by increasing the drainage speed.

Description

Technical Field

[0001] This invention relates to the field of pleural effusion drainage devices, and particularly to a self-adjusting pleural drainage tube. Background Technology

[0002] The pleural cavity is a potential space located between the lungs and the chest wall, normally containing a small amount of fluid for lubrication. Under the influence of various pathological factors, the balance between the production and absorption of fluid in the pleural cavity is disrupted, leading to abnormal fluid accumulation and the formation of pleural effusion. Pleural effusion is a common clinical symptom, with a complex composition that may include transudate, exudate, and even blood or pus.

[0003] For pleural effusion, the routine clinical treatment is chest tube drainage. Currently, a chest drainage tube is commonly used as the drainage device. During the procedure, one end of the chest drainage tube is inserted into the patient's pleural cavity, and the other end is connected to a water-seal bottle, thereby draining the pleural effusion to relieve symptoms and facilitate subsequent treatment.

[0004] However, in clinical practice, the composition of pleural effusion is often quite complex. For example, in cases of hemothorax or empyema, the effusion not only contains highly viscous fluids such as blood and pus, but may also contain solid impurities such as sloughed tissue mucosa and fibrin. Existing chest drainage tubes typically have relatively small drainage ports. When draining such complex effusions, this results in slow drainage rates, affecting treatment efficiency. Furthermore, these viscous substances and impurities can easily accumulate at the narrow port, leading to tube blockage. Summary of the Invention

[0005] To solve, or at least partially solve, the above-mentioned technical problems, the present invention provides a self-adjusting chest drainage tube.

[0006] This invention provides a self-adjusting chest drainage tube, which includes a drainage tube body having a main drainage channel; the drainage tube body includes multiple drainage sub-tubes, which are evenly arranged around the axis of the drainage tube body, and each drainage sub-tube has a drainage sub-channel; each drainage sub-tube includes an expansion section, a deformation section, and a drainage section arranged sequentially from the distal end to the proximal end, with the multiple expansion sections and multiple deformation sections jointly forming an expansion portion; the multiple drainage sections form the main drainage channel; in use, from the direction of the distal end to the direction of the proximal end, the cross-sectional area of ​​the internal space of the expansion portion gradually decreases until it is the same as the cross-sectional area of ​​the main drainage channel.

[0007] Optionally, the self-adjusting chest drainage tube also includes a connecting membrane, which is disposed between two adjacent drainage tubes and located at the expansion portion; in use, the connecting membrane in the expanded state is used to seal the gap between two adjacent drainage tubes.

[0008] Optionally, in a drainage tube, the expansion section and the deformation section form an expansion sub-section; in use, from the direction of the distal end to the direction of the proximal end, the cross-sectional area of ​​the expansion sub-section gradually decreases until it is the same as the cross-sectional area of ​​the drainage section.

[0009] Optionally, in any two adjacent drainage tubes, one drainage segment has a first notch on one side and the other drainage segment has a second notch on one side, the first notch and the second notch forming a drainage hole; multiple drainage holes are arranged sequentially at intervals from the direction of the distal end to the direction of the proximal end.

[0010] Optionally, the self-adjusting chest drainage tube further includes a connecting tube and a ring-shaped contractile sac with a contractile cavity; the contractile sac is located within the drainage hole. The connecting tube is located between two adjacent drainage sub-tubes; one end of the connecting tube communicates with the contractile cavity, and the other end of the connecting tube is located at the proximal end of the drainage tube body.

[0011] Optionally, the self-adjusting chest drainage tube further includes a connecting tube and a contractile sac. The contractile sac has a first sac cavity and a second sac cavity, and the contractile sac cavity is located within the drainage hole. The connecting tube is located between two adjacent drainage sub-tubes. One end of the connecting tube is connected to the first sac cavity and the second sac cavity, and the other end of the connecting tube is located at the end of the drainage tube body near the proximal end. When the contractile sac cavity is inflated, the volume of the first sac cavity is greater than the volume of the second sac cavity, and the first sac cavity expands in the direction of the second sac cavity.

[0012] Optionally, the self-adjusting chest drainage tube further includes a sealing assembly disposed within the drainage hole, the sealing assembly being used to seal the drainage hole; the sealing assembly includes a sealing element and a first thread, the sealing element being disposed within the drainage hole; one end of the first thread is located outside the main drainage channel; the other end of the first thread passes through the main drainage channel and is connected to the sealing element.

[0013] Optionally, each expansion segment has a constraint hole at one end near the distal end; the self-adjusting chest drainage tube also includes a constraint wire, one end of which is located outside the main drainage channel; the other end of the constraint wire passes through the main drainage channel into the expansion segment, and after passing through multiple constraint holes in sequence, it is re-passed through the main drainage channel to the outside of the main drainage channel.

[0014] The present invention also provides a self-adjusting chest drainage tube, which includes a drainage tube body having a main drainage channel; the drainage tube body includes multiple drainage sub-tubes, which are evenly arranged around the axis of the drainage tube body, each drainage sub-tube having a drainage sub-channel, and the end of the drainage sub-channel near the distal end is sealed; the drainage sub-tube includes an expansion section, a deformation section, and a drainage section arranged sequentially from the distal end to the proximal end, the multiple expansion sections and the multiple deformation sections together forming an expansion portion; the multiple drainage sections form the main drainage channel; in use, from the direction of the distal end to the direction of the proximal end, the cross-sectional area of ​​the internal space of the expansion portion gradually decreases until it is the same as the cross-sectional area of ​​the main drainage channel.

[0015] Optionally, the self-adjusting chest drainage tube also includes a connecting membrane, which is disposed between two adjacent drainage tubes and located at the expansion portion; in use, the connecting membrane in the expanded state is used to seal the gap between two adjacent drainage tubes.

[0016] Optionally, in a drainage tube, the expansion section and the deformation section form an expansion sub-section; in use, from the direction of the distal end to the direction of the proximal end, the cross-sectional area of ​​the expansion sub-section gradually decreases until it is the same as the cross-sectional area of ​​the drainage section.

[0017] Optionally, in any two adjacent drainage tubes, one drainage segment has a first notch on one side and the other drainage segment has a second notch on one side, the first notch and the second notch forming a drainage hole; multiple drainage holes are arranged sequentially at intervals from the direction of the distal end to the direction of the proximal end.

[0018] Optionally, the self-adjusting chest drainage tube further includes a first constriction member and a second constriction member. The first constriction member includes a first constriction membrane with a first through hole and a first thread, the diameter of which is smaller than the diameter of the drainage hole. The first constriction membrane is located within the main drainage channel and covers the drainage hole. One end of the first thread is located outside the main drainage channel, and the other end of the first thread passes through the main drainage channel and is connected to the distal end of the first constriction membrane. The second constriction member includes a second constriction membrane with a second through hole and a second thread, the diameter of which is smaller than the diameter of the first through hole. The second constriction membrane is located within the main drainage channel and covers the first through hole. The first thread is located between the second and first constriction membranes. One end of the second thread is located outside the main drainage channel, and the other end of the second thread passes through the main drainage channel and is connected to the distal end of the second constriction membrane.

[0019] Compared to existing technologies, in this embodiment, the technical solution utilizes multiple drainage sub-tubes to form a drainage tube body. These sub-channels are arranged around a main drainage channel, and the main drainage channel and the multiple sub-channels work together to drain pleural effusion, accelerating the drainage process. This faster drainage reduces the risk of blood clots forming and blocking the main or sub-channels. While pleural effusion containing blood, pus, and solid impurities may block the main or some sub-channels, the self-adjusting chest drainage tube of this embodiment has multiple sub-channels. Even if solid impurities block the main channel and some sub-channels, the remaining sub-channels can still drain the pleural effusion, demonstrating the self-adjusting adaptability of the chest drainage tube. Furthermore, because the drainage tube is composed of multiple drainage sub-tubes, and its material is softer than that of existing chest drainage tubes, the patient's chest and abdomen exert a slight pressure on the drainage tube as the patient breathes, causing the drainage tube to produce an effect similar to intestinal peristalsis, thereby accelerating the drainage of pleural effusion and avoiding the risk of blockage of the chest drainage tube. Attached Figure Description

[0020] To more clearly illustrate the embodiments of the present invention, the relevant accompanying drawings will be briefly described below. It should be understood that the drawings described below are only for illustrating some embodiments of the present invention, and those skilled in the art can obtain many other technical features and connections not mentioned herein based on these drawings.

[0021] Figure 1 This is a cross-sectional schematic diagram of an embodiment of the self-adjusting chest drainage tube of the present invention in use. Figure 1 ; Figure 2 This is a schematic diagram of an embodiment of the present invention in which a self-adjusting chest drainage tube is in a non-use state; Figure 3 This is an exploded view of an embodiment of a self-adjusting chest drainage tube according to the present invention. Figure 1 ; Figure 4 This is a cross-sectional schematic diagram of an embodiment of a self-adjusting chest drainage tube according to the present invention. Figure 1 ; Figure 5 This is an exploded view of an embodiment of a self-adjusting chest drainage tube according to the present invention. Figure 2 ; Figure 6 This is a top view schematic diagram of an embodiment of the present invention, showing a self-adjusting chest drainage tube in use. Figure 1 ; Figure 7This is a schematic diagram of an embodiment of a self-adjusting chest drainage tube according to the present invention; Figure 8 This is a top view schematic diagram of an embodiment of the present invention, showing a self-adjusting chest drainage tube in use. Figure 2 ; Figure 9 This is a cross-sectional schematic diagram of an embodiment of a self-adjusting chest drainage tube according to the present invention. Figure 2 ; Figure 10 This is a schematic diagram of an embodiment of the self-adjusting chest drainage tube of the present invention in use; Figure 11 This is a partial exploded view of an embodiment of a self-adjusting chest drainage tube according to the present invention; Figure 12 This is a partial schematic diagram of an embodiment of a self-adjusting chest drainage tube according to the present invention. Figure 1 ; Figure 13 This is a partial schematic diagram of an embodiment of a self-adjusting chest drainage tube according to the present invention. Figure 2 ; Figure 14 This is a cross-sectional schematic diagram of an embodiment of the contractile sac of a self-adjusting chest drainage tube according to the present invention. Figure 1 ; Figure 15 This is a cross-sectional schematic diagram of an embodiment of the contractile sac of a self-adjusting chest drainage tube according to the present invention. Figure 2 ; Figure 16 This is a cross-sectional schematic diagram of an embodiment of the contractile sac of a self-adjusting chest drainage tube according to the present invention. Figure 3 ; Figure 17 This is a cross-sectional schematic diagram of an embodiment of the self-adjusting chest drainage tube of the present invention in use. Figure 2 ; Figure 18 This is a schematic diagram of the structure of a sealing assembly for a self-adjusting chest drainage tube according to an embodiment of the present invention; Figure 19 This is a cross-sectional schematic diagram of an embodiment of the self-adjusting chest drainage tube of the present invention in use. Figure 3 ; Figure 20 This is a schematic diagram of an embodiment of the first and second orifice-shrinking components of a self-adjusting chest drainage tube according to the present invention.

[0022] Explanation of reference numerals in the attached figures: 1. Drainage tube body; 10. Main drainage channel; 11. Drainage sub-tube; 111. Drainage sub-channel; 12. Expansion section; 13. Deformation section; 14. Drainage section; 141. First notch; 142. Second notch; 15. Expansion sub-section; 16. Drainage section; 17. Expansion section; 18. Drainage hole; 19. Expansion channel; 21. Connecting membrane; 3. Contraction cyst body; 30. Contraction cyst cavity; 31. First cyst cavity; 32. Second cyst cavity; 33. Compression hole; 34. Transition hole; 4. Adapter; 41. 42. Adapter channel; 43. Connecting channel; 44. Snap-fit ​​protrusion; 45. Connecting hole; 46. Injection port; 47. Fixing protrusion; 48. Constraint hole; 49. Constraint wire; 51. Fixing ring; 6. Connecting tube; 6. Sealing assembly; 61. Sealing component; 62. First wire drawing; 63. Sealing membrane; 64. First cavity shrinking component; 641. First cavity shrinking membrane; 642. First through hole; 65. Second cavity shrinking component; 651. Second cavity shrinking membrane; 652. Second through hole; 66. Second wire drawing; 67. Third wire drawing. Detailed Implementation

[0023] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0024] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0025] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0026] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0027] Unless otherwise stated, the term "multiple" means two or more, and "multiple groups" means two or more groups.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0029] The inventors discovered that existing chest drainage tubes have a slow drainage speed when draining pleural effusion, and that impurities in the pleural effusion can clog the chest drainage tube.

[0030] In view of this, the inventors of the present invention provide a self-adjusting chest drainage tube to solve the above-mentioned problems. Several specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0031] First Embodiment The self-adjusting chest drainage tube mentioned in this embodiment, such as Figure 1 , Figure 2 As shown, the self-adjusting chest drainage tube includes a drainage tube body 1. In this embodiment, for ease of description of the structure of the drainage tube body 1, the description is based on the drainage tube body 1 being in use. Multiple drainage sub-tubes 11 are evenly arranged around an axis, forming the drainage tube body 1. This axis can be considered as the axis of the drainage tube body 1. Figure 1The dotted line in the diagram represents the axis of the drainage tube body 1. Multiple drainage sub-tubes 11 are evenly distributed around the axis of the drainage tube body 1. The internal space of each drainage sub-tube 11 can be considered as a drainage sub-channel 111. Each drainage sub-tube 11 is divided into three parts: an expansion section 12, a deformation section 13, and a drainage section 14. From the distal end to the proximal end, the expansion section 12, deformation section 13, and drainage section 14 are arranged sequentially. In a single drainage sub-tube 11, the expansion section 12 and deformation section 13 together form an expansion sub-section 15. In the drainage tube body 1, the expansion sub-sections 15 of multiple drainage sub-tubes 11 form an expansion section 17 around the axis of the drainage tube body 1. Therefore, the expansion section 17 can also be considered as being formed by multiple expansion sections 12 and multiple deformation sections 13. The drainage sections 14 of multiple drainage tubes 11 form a drainage portion 16 around the axis of the drainage tube body 1. The internal space of the drainage portion 16 can be considered as the main drainage channel 10. The internal space of the expansion portion 17 can be considered as the expansion channel 19, and the main drainage channel 10 is connected to the expansion channel 19. When the drainage tube body 1 is in use, the cross-sectional area of ​​the expansion channel 19 gradually decreases from the distal end to the proximal end until it is the same as the cross-sectional area of ​​the main drainage channel 10. Optionally, the cross-sectional area of ​​the expansion channel 19 near the distal end is 1.5 to 3 times the cross-sectional area of ​​the main drainage channel 10. Preferably, the cross-sectional area of ​​the expansion channel 19 near the distal end is twice the cross-sectional area of ​​the main drainage channel 10. When the drainage tube body 1 is not in use, the outer diameter of the expansion portion 17 is the same as the outer diameter of the main drainage channel 10.

[0032] Optional, such as Figure 3 As shown, the self-adjusting chest drainage tube also includes an adapter 4. The adapter 4 has an internal adapter channel 41. The shape of one opening of the adapter channel 41 is adapted to the shape of one end of the drainage tube body 1 near the proximal end, and the adapter 4 is fitted onto that end. One end of the flexible tube is inserted into the other opening of the adapter channel 41, and the other end is inserted into the collection port of the pleural effusion collection bag, thus achieving the purpose of collecting pleural effusion into the pleural effusion collection bag. In this technical solution, the flexible tube and the pleural effusion collection bag are existing technologies and will not be described in detail here.

[0033] The exemplary usage of the self-adjusting chest drainage tube disclosed in this embodiment is as follows: like Figure 1 , Figure 2As shown, a surgical incision is first made on the human body using a scalpel. The length of this incision is the same as the outer diameter of the self-adjusting chest drainage tube in this embodiment, or the length of the incision is 1mm to 3mm longer than the outer diameter of the self-adjusting chest drainage tube, thus forming a passage to the chest cavity. The surgeon squeezes the expansion section 17, making the drainage tube body 1 non-useful. The expansion section 17 of the drainage tube body 1, which is in the non-useful state, is inserted through the incision into the chest cavity. Then, the squeezing of the expansion section 17 is released, and the expansion section 17 changes from the non-useful state to the use state. The expansion section 17 in the use state facilitates the collection of pleural effusion. The pleural effusion is drained through the cooperation of the main drainage channel 10 of the drainage tube body 1 and multiple drainage sub-channels 111.

[0034] Compared to existing technologies, in this embodiment, the technical solution utilizes multiple drainage sub-tubes 11 to form a drainage tube body 1, with multiple drainage sub-channels 111 arranged around the main drainage channel 10. The main drainage channel 10 and the multiple drainage sub-channels 111 work together to drain pleural effusion and accelerate the drainage speed. This accelerated drainage speed reduces the risk of blood clots forming and blocking the main drainage channel 10 or drainage sub-channels 111. When the pleural effusion contains blood, pus, and solid impurities, there is a risk of solid impurities blocking the main drainage channel 10 or some drainage sub-channels 111. However, the self-adjusting pleural drainage tube of this embodiment has multiple drainage sub-channels 111. Even if solid impurities block the main drainage channel 10 and some drainage sub-channels 111, the remaining drainage sub-channels 111 can still drain the pleural effusion, demonstrating the self-adjusting adaptability of the pleural drainage tube. Furthermore, since the drainage tube body 1 is composed of multiple drainage sub-tubes 11, the material of the drainage tube body 1 is softer than that of existing chest drainage tubes. With the patient's breathing, the patient's chest and abdomen exert a slight squeezing effect on the drainage tube body 1, which produces an effect similar to intestinal peristalsis, thereby accelerating the drainage of pleural effusion and avoiding the risk of blockage of the chest drainage tube.

[0035] Second Embodiment This embodiment also proposes a self-adjusting chest drainage tube. The second embodiment is a parallel technical solution to the first embodiment, differing from the first embodiment in the structure of the drainage sub-tube, as detailed below: Optional, such as Figure 4 As shown, since the structures of multiple drainage sub-tubes 11 are identical, only one drainage sub-tube 11 is used as an example for description. The end of the expansion section 12 near the distal end is sealed, thus making the end of the drainage sub-channel 111 near the distal end closed. The difference from the first embodiment is that the auxiliary drainage function of the drainage sub-channel 111 is transformed into the function of promoting the drainage of the main drainage channel 10.

[0036] Optional, such as Figure 1 , Figure 5 As shown, the self-adjusting chest drainage tube also includes an adapter 4. The adapter 4 has an internal adapter channel 41, and the wall of the adapter channel 41 has a connecting channel 42, which is arranged in a ring around the axis of the adapter 4. The outer wall of the adapter 4 has an injection port 45 communicating with the connecting channel 42. The distal end face of the adapter 4 has multiple snap-fit ​​protrusions 43, the shape of which matches the shape of the drainage sub-channel 111. The number of snap-fit ​​protrusions 43 is the same as the number of drainage sub-channels 11, and each snap-fit ​​protrusion 43 has a connecting hole 44, which communicates with the connecting channel 42. By placing the snap-fit ​​protrusions 43 within the drainage sub-channel 111, a detachable connection between the adapter 4 and the drainage tube body 1 is achieved, as well as communication between the main drainage channel 10 and the adapter channel 41. The cross-sectional area of ​​the adapter channel 41 gradually decreases from the distal end to the proximal end. One end of the tubing is inserted into the other opening of the transfer channel 41, and the other end is inserted into the collection port of the pleural effusion collection bag, thus achieving the purpose of collecting pleural effusion into the pleural effusion collection bag. In this technical solution, both the tubing and the pleural effusion collection bag are existing technologies and will not be described in detail here.

[0037] The exemplary usage of the self-adjusting chest drainage tube disclosed in this embodiment is as follows: like Figures 1 to 5 As shown, a surgical incision is first made on the human body using a scalpel. The length of this incision is the same as the outer diameter of the self-adjusting chest drainage tube in this embodiment, or the length of the incision is 1mm to 3mm longer than the outer diameter of the self-adjusting chest drainage tube, thus forming a passage to the chest cavity. The surgeon squeezes the expansion portion 17, making the drainage tube body 1 non-useful. The expansion portion 17 of the drainage tube body 1, which is in the non-useful state, is inserted through the incision into the chest cavity. Then, the squeezing of the expansion portion 17 is released, and the expansion portion 17 changes from the non-useful state to the use state. The expansion portion 17 in the use state facilitates the collection of pleural effusion. The pleural effusion is drained through the main drainage channel 10 of the drainage tube body 1.

[0038] When a doctor notices a slowdown in drainage speed and a potential risk of solid impurities clogging the main drainage channel 10, the doctor can connect the inlet 45 to a pump. The pump delivers saline solution to the inlet 45, which then enters the connecting channel 42 through the inlet 45 and the drainage sub-channel 111 through the connecting hole 44. This causes the drainage sub-tube 11 to expand. The pump then removes the saline solution from the drainage sub-channel 111, restoring the drainage sub-tube 11 to its original state. By repeatedly switching the drainage sub-tube 11 between its expanded and original states, the drainage tube 1 produces an effect similar to intestinal peristalsis, thereby accelerating the drainage of pleural effusion and avoiding the risk of blockage of the pleural drainage tube.

[0039] Compared to existing technologies, in this embodiment, the technical solution utilizes multiple drainage sub-tubes 11 to form a drainage tube body 1, with multiple drainage sub-channels 111 arranged around the main drainage channel 10, and the distal end of each drainage sub-channel 111 is blocked. When the pleural effusion contains blood, pus, and solid impurities, there is a risk of fixed impurities blocking the main drainage channel 10. By injecting saline solution into the drainage sub-channels 111, the drainage sub-tubes 11 repeatedly switch between an expanded state and their original state, thereby causing the drainage tube body 1 to produce an effect similar to intestinal peristalsis, thus accelerating the drainage of pleural effusion and avoiding the risk of blockage of the pleural drainage tube.

[0040] Third Embodiment This embodiment also proposes a self-adjusting chest drainage tube. The third embodiment is a further improvement based on the first or second embodiment, with the main improvement being the structure of the expansion section, as detailed below: Optional, such as Figure 1 , Figure 2 , Figure 6As shown, since the structures of multiple drainage tubes 11 are identical, the structure of one drainage tube is used as an example for description. Each drainage tube 11 has a circular tubular structure, and the inner diameters of the expansion section 12 and the deformation section 13 are the same as the inner diameter of the drainage section 14. Furthermore, the outer diameters of the expansion section 12 and the deformation section 13 are the same as the outer diameter of the drainage section 14. When multiple drainage tubes 11 form the drainage tube body 1, and the drainage tube body 1 is in use, there is a gap between the expansion sections 15 of any two adjacent drainage tubes 11. The presence of this gap hinders the entry of pleural effusion into the main drainage channel 10. In this technical solution, the self-adjusting pleural drainage tube also includes connecting films 21, the number of which is the same as the number of gaps. Taking the drainage tube body 1 in use as an example, the connecting films 21 in the expanded state are fan-shaped and are located within the gaps. One side of the connecting film 21 is connected to the expansion section 15 of one drainage tube 11, and the other side of the connecting film 21 is connected to the expansion section 15 of another drainage tube 11. Thus, the connecting film 21 can be considered to be located at the expansion section 17 of the drainage tube body 1. In this technical solution, the gap between the two expansion sections 15 is sealed by the connecting film 21, and the structure of the expansion section 17 is further improved, making the expansion section 17 a funnel-shaped structure. The internal space of the expansion section 17 facilitates the collection of pleural effusion and gathers it into the main drainage channel 10. When the drainage tube body 1 is not in use, the outer diameter of the expansion section 17 is the same as the outer diameter of the main drainage channel 10. At this time, the connecting film 21 is folded, and the folded connecting film 21 is located within the expansion channel 19, allowing the two adjacent drainage tubes 11 to contact each other. This facilitates the placement of the drainage tube body within the pleural cavity.

[0041] Optional, such as Figure 1 , Figure 7 , Figure 8As shown, since the structures of multiple drainage tubes 11 are identical, the structure of one drainage tube will be described as an example. The cross-sectional area of ​​the distal end of the dilation section 15 is larger than that of the proximal end, and the cross-sectional area of ​​the proximal end of the dilation section 15 is the same as that of the drainage section 14. From the distal end to the proximal end, the cross-sectional area of ​​the dilation section 15 gradually decreases until it is the same as that of the drainage section 14. The wall thickness of the drainage section 14 is 1.5 to 3 times that of the wall thickness of the dilation section 15. Taking the drainage tube body 1 in use as an example, the dilation sections 15 of the multiple drainage tubes 11 surround a funnel-shaped dilation section 17, and the internal space of the dilation section 17 is a dilation channel 19. The dilation channel 19 of the dilation section 17 facilitates the collection of pleural effusion and gathers the pleural effusion into the main drainage channel 10. When the drainage tube body 1 is not in use, the expansion sections 15 of multiple drainage sub-tubes 11 together form an expansion section 17, and the outer diameter of the expansion section 17 is the same as the outer diameter of the main drainage channel 10. At this time, one side wall of the expansion section 15 located within the expansion channel 19 protrudes towards the axis of the drainage tube body 1, allowing adjacent drainage sub-tubes 11 to contact each other. This facilitates the placement of the drainage tube body within the pleural cavity. If this technical solution is applied to the first embodiment, the structure of the expansion section 15 also facilitates the drainage of pleural effusion into the drainage sub-channel 111. If this technical solution is applied to the second embodiment, the structure of the expansion section 15 can enhance the drainage effect of pleural effusion, thereby avoiding the risk of blockage of the pleural drainage tube.

[0042] Optional, such as Figure 1 , Figure 7 , Figure 9 As shown, based on the above-mentioned optional technical solutions, the structure of the expansion sub-section 15 is further improved. The expansion sub-section 15 has multiple fixing protrusions 46 on one side wall outside the expansion channel 19. All fixing protrusions 46 are located on the side wall away from the axis of the drainage tube body 1. Specifically, the fixing protrusions 46 are arranged sequentially at intervals from the distal end to the proximal end. Optionally, the fixing protrusions 46 are hemispherical in shape, and their diameter is 1mm to 2mm. By providing fixing protrusions 46 on the expansion sub-section 15, the fixing protrusions 46 can increase the stability of the expansion section 17 within the thoracic cavity during use.

[0043] You may choose any one of the three technical solutions mentioned above.

[0044] Fourth embodiment This embodiment also proposes a self-adjusting chest drainage tube. The fourth embodiment is a further improvement based on any one of the first to third embodiments, with the main improvement being in the structure of the expansion section. The specific solution is as follows: likeFigure 1 , Figure 6 , Figure 10 As shown, in each drainage tube 11, the distal end of the expansion section 12 has a constraint hole 47, which is located on the side of the expansion section 12 near the expansion channel 19. The self-adjusting chest drainage tube also includes a constraint wire 48, which is made of metal or flexible material, for example, stainless steel or medical silicone. One end of this constraint wire 48 is placed outside the main drainage channel 10. Then, the other end of this constraint wire 48 is passed through the main drainage channel 10 into the expansion channel 19 of the expansion section 17, and then sequentially through the constraint hole 47 of each drainage tube 11. Then, it is passed through the expansion channel 19 and the main drainage channel 10 again, so that both ends of the constraint wire 48 are located outside the main drainage channel 10 and at the proximal end of the main drainage channel 10.

[0045] By simultaneously moving both ends of the restraint wire 48 proximally, as the restraint wire 48 moves proximally, the distal ends of multiple dilatation sections 15 move towards the axis of the drainage tube body 1, making the outer diameter of the dilatation section 17 the same as the outer diameter of the main drainage channel 10. The movement of the restraint wire 48 is then stopped, at which point the drainage tube body 1 is in a non-use state. This facilitates the insertion of the dilatation section 17 through the wound into the pleural cavity. Once the dilatation section 17 is in the pleural cavity, the surgeon releases one end of the restraint wire 48 and drives the other end of the restraint wire 48 proximally, thus removing the restraint wire 48 from the drainage tube body 1. Without the restraint of the restraint wire 48, the distal ends of the multiple dilatation sections 15 move away from the axis of the drainage tube body 1, thus completing the switch of the drainage tube body 1 from a non-use state to a use state, facilitating the drainage of pleural effusion.

[0046] Optional, such as Figure 10 As shown, based on the above technical solution, one of the multiple drainage tubes 11 has a fixing ring 49. This fixing ring 49 is located on the drainage section 14 of the drainage tube 11, at the end of the drainage section 14 closest to the proximal end, and outside the main drainage channel 10. When the drainage tube body 1 is not in use, both ends of the constraint wire 48 pass through the annular holes of the fixing ring 49 and are fixed to the fixing ring 49 by a binding method. This allows the drainage tube body 1 to be stably in a non-use state.

[0047] Fifth embodiment This embodiment also proposes a self-adjusting chest drainage tube. The fifth embodiment is a further improvement based on any one of the first to fourth embodiments. The main improvement is that the drainage tube body has a drainage hole, and the specific solution is as follows: Optional, such as Figure 1, Figure 11 , Figure 12 As shown, among the multiple drainage tubes 11 constituting the drainage tube body 1, two adjacent drainage tubes 11 are selected. In these two adjacent drainage tubes 11, a portion of the drainage section 14 of one drainage tube 11 is recessed away from the other drainage tube 11, forming a first notch 141. The first notch 141 is located at the end of the drainage section 14 of this drainage tube 11 near the dilation section 15, that is, the drainage section 14 of this drainage tube 11 has a first notch 141. Correspondingly, a portion of the drainage section 14 of the other drainage tube 11 is recessed away from the drainage tube 11 with the first notch 141, forming a second notch 142. The second notch 142 is located at the end of the drainage section 14 of this drainage tube 11 near the dilation section 15, that is, the drainage section 14 of this drainage tube 11 has a second notch 142. Since the two drainage tubes 11 are adjacent, the first notch 141 and the second notch 142 form a drainage hole 18. By setting a drainage hole 18 on the drainage tube body 1, the risk of the chest drainage tube being blocked can be reduced, and the drainage effect of pleural effusion can be enhanced.

[0048] Optional, such as Figure 12 As shown, based on the above-mentioned optional technical solutions, the drainage holes 18 are further improved by having multiple drainage holes 18 arranged sequentially and at intervals from the distal end to the proximal end. By providing multiple drainage holes 18 on the drainage tube body 1, the risk of the chest drainage tube being blocked can be further reduced, and the drainage effect of pleural effusion can be further enhanced.

[0049] Optional, such as Figure 1 , Figure 13 , Figure 14As shown, based on the two optional technical solutions mentioned above, the self-adjusting chest drainage tube also includes a connecting tube 51 and a contractile sac 3, with a compression hole 33 in the middle of the contractile sac 3. When the contractile sac 3 is placed inside the drainage hole 18, the compression hole 33 can be considered as the drainage hole 18. The contractile sac 3 has a contractile cavity 30 inside. The connecting tube 51 is located outside the main drainage channel 10 and between the two drainage sub-tubes 11 forming the drainage hole 18. One end of the connecting tube 51 is connected to the contractile cavity 30, and the other end of the connecting tube 51 is located at the end of the drainage tube body 1 near the proximal end. The other end of the connecting tube 51 is connected to the outlet of the liquid pump. In this technical solution, the liquid pump is existing technology and will not be described in detail here. The wall thickness of the contractile cavity 30 is uniform and consistent. When the contractile sac 3 is in an inflated state, the contractile sac 3 has a ring structure. When the contractile sac 3 is in its original state, the contractile sac 3 is attached to the wall of the drainage hole 18. When solid impurities in the pleural effusion block the drainage hole 18, or when the viscosity of the pleural effusion is too high, causing slow drainage, saline solution flows out from the outlet of the pump and is injected into the contractile cuff 30 through the connecting tube 51 to inflate the contractile cuff 3, thus reducing the size of the drainage hole 18. Then, the pump extracts the saline solution from the contractile cuff 30, returning the contractile cuff 3 to its original state. This process of repeatedly controlling the contractile cuff 3 between its inflated and original states compresses the pleural effusion, promoting its rapid passage through the drainage hole 18 and into the main drainage channel 10. By placing the contractile cuff 3 within the drainage hole 18, the risk of pleural effusion blocking the drainage hole 18 is reduced, improving drainage effectiveness.

[0050] Optional, such as Figure 15 , Figure 16 As shown, the difference from the above technical solution lies in the structure of the contractile sac. The contractile sac 3 has a first sac cavity 31 and a second sac cavity 32. The first sac cavity 31 is connected to the second sac cavity 32 through a transition hole 34. One end of the connecting tube 51 is connected to the first sac cavity 31, thus realizing the connection between the connecting tube 51 and the second sac cavity 32 through the first sac cavity 31. The contractile sac 3 is divided into two parts, one part near the proximal end and the other part near the distal end. The first sac cavity 31 is located in the part near the proximal end, and the second sac cavity 32 is located in the part near the distal end. The wall thickness of the second sac cavity 32 is 1.5 to 3 times the wall thickness of the first sac cavity 31. This arrangement is more conducive to the expansion of the first sac cavity 31, and the volume of the first sac cavity 31 in the expanded state is larger than the volume of the second sac cavity 32. When the contractile sac 3 is in such a state... Figure 15In its initial state, the contractile sac 3 is attached to the wall of the drainage hole 18. When solid impurities in the pleural effusion block the drainage hole 18, or when the viscosity of the pleural effusion is high enough to cause slow drainage, saline solution flows out from the outlet of the pump and is injected into the first sac cavity 31 through the connecting tube 51. A portion of the saline solution enters the second sac cavity 32 through the first sac cavity 31, while the remaining portion remains in the first sac cavity 31. Utilizing the difference in wall thickness between the first sac cavity 31 and the second sac cavity 32, the first sac cavity 31 expands towards the second sac cavity 32, thus reducing the size of the drainage hole 18, i.e., the contractile sac 3 is positioned as shown in the diagram. Figure 16 The swelling state is shown. Then, a pump is used to extract saline solution from the first cyst cavity 31 and the second cyst cavity 32, returning the contractile cyst 3 to its original state. This process of repeatedly controlling the contractile cyst 3 between the inflated and original states utilizes non-uniform expansion to compress solid impurities or pleural effusion, resulting in greater compression force. This further reduces the risk of pleural effusion blocking the drainage hole 18 and improves the drainage effect.

[0051] You may choose any one of the four technical solutions mentioned above.

[0052] Sixth Embodiment This embodiment also proposes a self-adjusting chest drainage tube. The sixth embodiment is a further improvement based on the fifth embodiment, with the main improvements being: Optional, such as Figure 17 As shown, the self-adjusting chest drainage tube also includes a sealing assembly 6, which is disposed within the drainage hole 18 and is used to seal the drainage hole 18. The sealing assembly 6 includes a sealing element 61 and a first thread 62. The shape of the sealing element 61 is adapted to the shape of the drainage hole 18, and the sealing element 61 is disposed within the drainage hole 18. One end of the first thread 62 is disposed outside the main drainage channel 10, and one end of the first thread 62 is bonded to a drainage sub-tube 11 with hot melt adhesive. The other end of the first thread 62 passes through the main drainage channel 10 and is connected to the sealing element 61.

[0053] Optional, such as Figure 17 , Figure 18 As shown, based on the above technical solution, the sealing assembly 6 further includes a sealing membrane 63, with the sealing element 61 disposed at the center of the sealing membrane 63. The other end of the first drawn wire 62 is connected to the end of the sealing membrane 63 near the distal end. The first drawn wire 62 and the sealing element 61 are connected through the sealing membrane 63. The sealing membrane 63 can seal the gap between the sealing element 61 and the drainage hole 18, and the first drawn wire 62 can more easily remove the sealing element 61 from the drainage hole 18 through the sealing membrane 63.

[0054] Either of the two optional technical solutions mentioned above can be chosen.

[0055] The exemplary usage of the self-adjusting chest drainage tube disclosed in this embodiment is as follows: like Figure 17 , Figure 18 As shown, in this embodiment, a self-adjusting chest drainage tube is implanted into the pleural cavity to drain pleural effusion. After a period of time, when the surgeon observes that solid impurities in the pleural effusion are blocking the main drainage channel 10 or the sub-drainage channel 111, in order to facilitate the drainage of the pleural effusion, the surgeon removes the other end of the first guide wire 62 from the sub-drainage channel 11 and drives the first guide wire 62 to move proximally. The first guide wire 62 causes the sealing element 61 to detach from the drainage hole 18, thereby opening the drainage hole 18. In this way, a new drainage hole 18 can be constructed on the drainage tube body 1 to facilitate the drainage of pleural effusion.

[0056] Seventh Embodiment This embodiment also proposes a self-adjusting chest drainage tube. The seventh embodiment is a parallel technical solution to the sixth embodiment, and the technical solution of the seventh embodiment is as follows: Optional, such as Figure 19 , Figure 20As shown, the self-adjusting chest drainage tube also includes a first constriction member 64 and a second constriction member 65. The first constriction member 64 includes a first constriction membrane 641 and a first thread 62. The first constriction membrane 641 has a first through hole 642, and the diameter of the first through hole 642 is smaller than the diameter of the drainage hole 18. The first constriction membrane 641 is disposed inside the main drainage channel 10 and is adhered to the cavity wall of the main drainage channel 10, covering the drainage hole 18. The first through hole 642 is coaxially arranged with the drainage hole 18. One end of the first thread 62 is disposed outside the main drainage channel 10 and is glued to a drainage sub-tube 11 with hot melt adhesive. The other end of the first thread 62 passes through the main drainage channel 10 and is connected to the distal end of the first constriction membrane 641. The second constriction member 65 includes a second constriction membrane 651 and a second wire 66. The length and width of the second constriction membrane 651 are smaller than those of the first constriction membrane 641. The second constriction membrane 651 has a second through hole 652, and the diameter of the second through hole 652 is smaller than that of the first through hole 642. The second constriction membrane 651 is disposed inside the main drainage channel 10 and is adhered to the first constriction membrane 641. The first wire 62 is located between the first constriction membrane 641 and the second constriction membrane 651. The second constriction membrane 651 covers the first through hole 642. The second through hole 652 and the first through hole 642 are coaxially arranged. One end of the second wire 66 is located outside the main drainage channel 10 and is bonded to another drainage tube 11 with hot melt adhesive. The other end of the second wire 66 is inserted into the main drainage channel 10, and the other end of the second wire 66 is connected to the end of the second pore membrane 651 near the distal end.

[0057] Optional, such as Figure 19 , Figure 20 As shown, based on the above technical solution, the self-adjusting chest drainage tube also includes a sealing membrane 63 and a third thread 67. The length and width of the sealing membrane 63 are smaller than those of the second constriction membrane 651. The sealing membrane 63 is disposed within the main drainage channel 10 and is adhered to the second constriction membrane 651, with the second thread 66 located between the sealing membrane 63 and the second constriction membrane 651. The sealing membrane 63 seals the second constriction membrane 651. One end of the third thread 67 is located outside the main drainage channel 10 and is adhered to another drainage sub-tube 11 with hot melt adhesive. The other end of the third thread 67 passes through the main drainage channel 10 and is connected to the distal end of the sealing membrane 63.

[0058] Optionally, not shown in the figure, the diameter of the first through hole 642 is 1 / 4 to 1 / 3 of the diameter of the drainage hole 18. The diameter of the second through hole 652 is 1 / 3 to 1 / 2 of the diameter of the first through hole 642. By gradually opening the second through hole 652, the first through hole 642, and the drainage hole 18, the surgeon can flexibly adjust the drainage effect of the pleural effusion.

[0059] You may choose any one of the three technical solutions mentioned above.

[0060] The exemplary usage of the self-adjusting chest drainage tube disclosed in this embodiment is as follows: like Figure 19 , Figure 20 As shown, in this embodiment, a self-adjusting chest drainage tube is implanted into the pleural cavity to drain pleural effusion. After a period of time, if the surgeon observes that solid impurities in the pleural effusion are blocking the main drainage channel 10 or the sub-drainage channel 111, in order to facilitate the drainage of the pleural effusion, the surgeon first removes the third guide wire 67 from the sub-drainage tube 11 and drives the third guide wire 67 to move proximally. The third guide wire 67 causes the sealing membrane 63 to detach from the second constriction membrane 651, thereby opening the second through hole 652, which facilitates the drainage of pleural effusion. When the surgeon finds that the drainage speed has slowed down, the surgeon can also remove the second guide wire 66 from the sub-drainage tube 11 and drive the second guide wire 66 to move proximally. The second guide wire 66 causes the second constriction membrane 651 to detach from the first constriction membrane 641, thereby opening the first through hole 642, which further facilitates the drainage of pleural effusion. Of course, after the second constriction membrane 651 detaches from the first constriction membrane 641, the surgeon can continue to remove the first filament 62 from the drainage tube 11 and drive the first filament 62 to move proximally. The first filament 62 drives the first constriction membrane 641 to detach from the cavity wall of the main drainage channel 10, thereby completely opening the drainage hole 18. At this time, the drainage effect on pleural effusion is the best.

[0061] Finally, it should be noted that those skilled in the art will understand that many technical details have been presented in the embodiments of the present invention to facilitate a better understanding of the invention. However, even without these technical details and various variations and modifications based on the above embodiments, the technical solutions claimed in the claims of the present invention can be substantially achieved. Therefore, in practical applications, various changes in form and detail can be made to the above embodiments without departing from the spirit and scope of the present invention.

Claims

1. A self-adjusting chest drainage tube, characterized in that, include: The drainage tube body has a main drainage channel; the drainage tube body includes multiple drainage sub-tubes, which are evenly arranged around the axis of the drainage tube body, and each drainage sub-tube has a drainage sub-channel; the drainage sub-tube includes an expansion section, a deformation section, and a drainage section arranged sequentially from the distal end to the proximal end, and the multiple expansion sections and the multiple deformation sections together form an expansion section; the multiple drainage sections form the main drainage channel; In use, from the direction of the distal end to the direction of the proximal end, the cross-sectional area of ​​the internal space of the expansion section gradually decreases until it is the same as the cross-sectional area of ​​the main drainage channel.

2. The self-adjusting chest drainage tube according to claim 1, characterized in that, Also includes: A connecting membrane is disposed between two adjacent drainage tubes and located at the expansion portion; In use, the extended connecting membrane is used to seal the gap between two adjacent drainage tubes.

3. The self-adjusting chest drainage tube according to claim 1, characterized in that, In a drainage tube, the expansion section and the deformation section together form the expansion sub-section; In use, the cross-sectional area of ​​the expansion sub-section gradually decreases from the direction of the distal end to the direction of the proximal end until it is the same as the cross-sectional area of ​​the drainage section.

4. The self-adjusting chest drainage tube according to claim 1, characterized in that, In any two adjacent drainage tubes, one drainage segment has a first notch on one side and the other drainage segment has a second notch on one side, the first notch and the second notch together forming a drainage hole; Multiple drainage holes are arranged sequentially at intervals from the distal end to the proximal end.

5. The self-adjusting chest drainage tube according to claim 4, characterized in that, Also includes: The contractile sac has a ring-shaped structure and a contractile cavity; The contractile bladder is disposed inside the drainage hole; A connecting tube is located between two adjacent drainage tubes; one end of the connecting tube is connected to the contractile cyst cavity, and the other end of the connecting tube is located at the end of the drainage tube body near the proximal end.

6. The self-adjusting chest drainage tube according to claim 4, characterized in that, Also includes: The contractile cyst has a first cyst cavity and a second cyst cavity, and is located within the drainage hole; A connecting tube is placed between two adjacent drainage tubes; one end of the connecting tube is connected to the first cyst and the second cyst, and the other end of the connecting tube is located at the end of the drainage tube body near the proximal end; When the contractile cyst is inflated, the volume of the first cyst cavity is greater than the volume of the second cyst cavity, and the first cyst cavity expands in the direction of the second cyst cavity.

7. The self-adjusting chest drainage tube according to claim 4, characterized in that, It also includes a sealing assembly disposed within the drainage hole, the sealing assembly being used to seal the drainage hole; the sealing assembly includes: A sealing element is disposed inside the drainage hole; The first thread is drawn, with one end located outside the main drainage channel and the other end passing through the main drainage channel and connected to the sealing component.

8. The self-adjusting chest drainage tube according to claim 1, characterized in that, Each dilatation segment has a restraint hole at its distal end; the self-adjusting chest drainage tube also includes: The constraint wire has one end located outside the main drainage channel; the other end passes through the main drainage channel into the expansion section, and after passing through multiple constraint holes in sequence, it is re-passed through the main drainage channel to the outside of the main drainage channel.

9. A self-adjusting chest drainage tube, characterized in that, include: The drainage tube body has a main drainage channel; the drainage tube body includes multiple drainage sub-tubes, which are evenly arranged around the axis of the drainage tube body. Each drainage sub-tube has a drainage sub-channel, and the end of the drainage sub-channel near the distal end is sealed. Each drainage sub-tube includes an expansion section, a deformation section, and a drainage section arranged sequentially from the distal end to the proximal end. The multiple expansion sections and the multiple deformation sections together form an expansion section; the multiple drainage sections form the main drainage channel. When in use, the cross-sectional area of ​​the internal space of the expansion section gradually decreases from the direction of the distal end to the direction of the proximal end until it is the same as the cross-sectional area of ​​the main drainage channel.

10. The self-adjusting chest drainage tube according to claim 9, characterized in that, Also includes: A connecting membrane is disposed between two adjacent drainage tubes and located at the expansion portion; In use, the extended connecting membrane is used to seal the gap between two adjacent drainage tubes.

11. The self-adjusting chest drainage tube according to claim 9, characterized in that, In a drainage tube, the expansion section and the deformation section together form the expansion sub-section; In use, the cross-sectional area of ​​the expansion sub-section gradually decreases from the direction of the distal end to the direction of the proximal end until it is the same as the cross-sectional area of ​​the drainage section.

12. The self-adjusting chest drainage tube according to claim 9, characterized in that, In any two adjacent drainage tubes, one drainage segment has a first notch on one side and the other drainage segment has a second notch on one side, the first notch and the second notch together forming a drainage hole; Multiple drainage holes are arranged sequentially at intervals from the distal end to the proximal end.

13. The self-adjusting chest drainage tube according to claim 12, characterized in that, Also includes: The first cavitation reduction component includes a first cavitation reduction membrane with a first through hole and a first wire drawing, wherein the diameter of the first through hole is smaller than the diameter of the drainage hole. The first pore-shrinking membrane is located inside the main drainage channel and covers the drainage hole; one end of the first wire is located outside the main drainage channel; the other end of the first wire passes through the main drainage channel and is connected to the distal end of the first pore-shrinking membrane. The second constriction element includes a second constriction membrane with a second through hole and a second wire, wherein the diameter of the second through hole is smaller than the diameter of the first through hole; the second constriction membrane is located inside the main drainage channel and covers the first through hole; the first wire is located between the second constriction membrane and the first constriction membrane; one end of the second wire is located outside the main drainage channel; the other end of the second wire passes through the main drainage channel and is connected to the distal end of the second constriction membrane.

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