An easily extractable anti-residual tissue effusion drainage system

Abstract

The present invention relates to an easily extractable anti-residual tissue effusion drainage system, which includes a drainage tube, a drainage head, and a foamed sponge wrapped around the outside of the drainage head. The foamed sponge is made by expanding and foaming a high-molecular material. The surface of the foamed sponge is covered with a shaping net, and the end of the shaping net is fixed on a section of the drainage tube that is not inserted into the foamed sponge. A high-molecular synovial membrane is provided at the connection between the foamed sponge and the drainage tube. The high-molecular synovial membrane is arc-shaped and wraps around the outside of the shaping net. The drainage tube is connected to a negative pressure balloon and a drainage bag, and one-way valves are provided in the drainage tubes at both ends of the negative pressure balloon. The present invention can facilitate the removal of the drainage head after drainage is completed while avoiding damage to the tissue of the drainage cavity, reducing the resistance to the removal of the drainage tube, and avoiding leaving residual substances that cannot be absorbed by human tissues in the drainage cavity, thereby improving the postoperative recovery speed.

Description

Technical field:

[0001] The present invention relates to the technical field of medical devices, and in particular to an easy-to-pull-out anti-residual tissue effusion drainage system. Background technology:

[0002] Drainage after intracavitary surgery is an important part of surgical operations. Postoperative local tissue exudate, digestive tract fluid, lymph fluid and other fluids need to be drained to the outside of the body. The effusion produced after surgery, especially the corrosive digestive fluid and the fluid containing pathogens, if not accurately drained to the outside of the body, may cause serious clinical problems such as poor local tissue healing, infection, local tissue corrosion and bleeding if they accumulate locally. These problems can even cause serious surgical complications, lead to secondary surgery or even patient death. Dealing with these problems increases patient pain and occupies a large amount of medical resources. This problem is more serious in the presence of digestive tract fistulas such as bile leakage, pancreatic fistulas, intestinal fistulas or poor anastomosis healing. At present, drainage tubes are mainly used clinically to drain local effusions. When using this method, only the drainage fluid to be drained in the area directly in contact with the drainage hole of the drainage tube can be efficiently drained to the outside of the body. The drainage fluid in other areas needs to flow naturally to the drainage hole area of ​​the drainage tube to be drained to the outside of the body, which will cause some digestive tract fistula areas or poorly healed anastomotic tissues to be unable to dry. In addition, the existing drainage tubes are easy to detach from the drainage area, and tissue separation is also easy to cause problems such as poor drainage. Patent No. ZL202020918225.6 discloses a body cavity negative pressure drainage system based on non-absorbable fiber woven materials, including a balloon, with joints at both ends of the balloon, and each joint has a built-in one-way valve structure, one side of the balloon is connected to a drainage main pipe by a joint, and the end of the drainage main pipe is connected to a number of drainage branches, and the end of each drainage branch is also connected to an inseparable non-absorbable fiber woven material, and one side of the balloon is connected to a drainage bag by a joint. The non-absorbable fiber woven material is used to surround the surgical anastomosis and other parts. Due to the capillary phenomenon, the liquid around the anastomosis can be sucked into the non-absorbable fiber woven material, and the drainage fluid in the non-absorbable fiber woven material can be drawn out of the body by the drainage main pipe through negative pressure, thereby ensuring the dryness of the anastomosis, promoting the healing of the anastomosis, and reducing the risk of infection and bleeding caused by anastomotic leakage. However, this drainage structure needs to be removed from the drainage cavity after the drainage is completed. Since the drainage cavity will gradually shrink as the affected area grows and recovers, the drainage head in the drainage cavity and the fiber or foam sponge material arranged at the drainage head position may easily tear the healed tissue during the removal process, causing the wound to expand again. It is also easy to leave some residual substances in the drainage cavity that cannot be absorbed by the human tissue, resulting in slow recovery after surgery and affecting the treatment effect. Summary of the invention:

[0003] 1. Technical issues to be resolved

[0004] The present invention aims to provide an easily extractable anti-residual tissue effusion drainage system, which solves the problems in the prior art that during the removal process after drainage, it is easy to tear the already healed tissue, causing the re-expansion of the wound, and leaving some residual substances in the drainage cavity that cannot be absorbed by the human tissue, resulting in slow postoperative recovery and affecting the treatment effect.

[0005] (II) Technical Solution

[0006] To solve the above technical problems, the present invention adopts the following technical solution: An easily extractable anti-residual tissue effusion drainage system, comprising a drainage tube, a drainage head, and a foamed sponge wrapped around the outside of the drainage head. The foamed sponge is made by expanding and foaming a porous foamed polymer material. The surface of the foamed sponge is covered with a shaping net, and the end of the shaping net is fixed on a section of the drainage tube that is not inserted into the foamed sponge. A polymer synovial membrane is provided at the connection between the foamed sponge and the drainage tube. The polymer synovial membrane is arc-shaped and wraps around the outside of the shaping net. The drainage tube is connected to a negative pressure balloon and a drainage bag. One-way valves are provided in the drainage tubes at both ends of the negative pressure balloon. A plurality of drainage holes are provided on the drainage head.

[0007] The foamed sponge is used to fill the high-risk areas where postoperative effusion and digestive tract leakage occur. Due to the siphon effect of its porous structure, the drainage fluid can be sucked into the porous foamed material to keep the high-risk area dry, promote tissue healing, reduce the risk of leakage on the one hand, and on the other hand, promote the rapid healing of digestive tract leakage and reduce the risk of local infection and bleeding after leakage. The drainage head is used to suck out the drainage fluid sucked into the foamed sponge, and the drainage fluid is sucked into the drainage bag through the negative pressure suction generated by the negative pressure balloon. The one-way valve is used to control the flow direction of the drainage fluid to ensure that the drainage fluid flows into the drainage bag unidirectionally. The shaping net is used to limit the expansion shape of the foamed sponge and ensure the integrity of the foamed sponge during the process of pulling out the foamed sponge after drainage, preventing the foamed sponge from being crushed under the extrusion of the tissue and leaving non-absorbable residues in the drainage cavity. The polymer synovial membrane is used to reduce the resistance during the process of pulling out the drainage head and the foamed sponge, ensure smooth extraction, and reduce the tearing force on the tissue, avoid expanding the wound, and improve the postoperative recovery speed.

[0008] Further, a fixing ring and a sliding ring are provided on the outer side of the drainage tube. A damping cavity is provided inside the fixing ring. A piston and a piston rod are provided inside the damping cavity. A spring is connected between the piston and the inner wall of the damping cavity. The piston rod passes through the spring and is connected to the piston. A throttling hole communicating with the damping cavities on both sides of the piston is provided inside the piston. The damping cavity is filled with damping liquid. One side of the sliding ring is connected to the shaping net, and the other side of the sliding ring is connected to the piston rod. The sliding ring is used to slide along the drainage tube to control the expansion size of the shaping net, so that medical staff can place the appropriately sized foamed sponge into the drainage cavity according to the size of the drainage cavity. The piston is inside the damping cavity and slowly moves under the thrust of the spring and the resistance of the damping liquid. The expansion degree of the shaping net gradually shrinks over time, which can ensure that the foamed sponge is gradually compressed and reduced in size by the shaping net as the tissue grows and recovers and the drainage cavity shrinks. After the drainage is completed, the volume of the foamed sponge will shrink to be equivalent to the size of the drainage cavity after recovery, which is convenient for removal and reduces the damage to the tissue at the same time. The throttling hole is used to communicate the damping cavities at both ends of the piston to allow the damping liquid to flow from one side of the piston to the other side when the piston moves slowly.

[0009] Further, a one-way damping valve is provided inside the throttling hole. The one-way damping valve is used to ensure that during the slow movement of the piston, its opening degree changes with the pressure change on one side of the damping cavity to ensure the stability of the piston movement speed. When the sliding ring is pulled, the one-way damping valve does not work, ensuring that the damping liquid quickly flows from the side of the damping cavity with the piston rod to the side without the piston rod.

[0010] Further, the one-way damping valve includes a valve plate rotatably connected to the inner wall of the throttling hole. A compression spring is connected between the valve plate and the inner wall of the throttling hole. As the piston moves, the valve plate rotates against the force of the compression spring with the pressure change on one side of the damping cavity, expanding the flow area of the throttling hole to ensure the stable movement of the piston.

[0011] Further, a through-flow hole communicating with the throttling hole is provided on the piston rod. The through-flow hole communicates with the damping cavity. The through-flow hole is used to ensure the communication of the damping cavities at both ends of the piston.

[0012] Further, the material of the shaping net is a high molecular plastic material including but not limited to polypropylene or nylon, with good elasticity and plasticity, which is convenient for controlling deformation.

[0013] Further, the high molecular synovial membrane is polytetrafluoroethylene or PET film, with low roughness and smooth surface, effectively reducing the friction with the tissue and avoiding tearing.

[0014] Furthermore, an anti-slip ring is provided on the outer side of the sliding ring, and an elastic gasket is provided on the contact surface between the sliding ring and the drainage tube. The anti-slip ring is used to facilitate medical staff to manually pull the sliding ring to move along the drainage tube, and the elastic gasket ensures that there is sufficient friction between the sliding ring and the drainage tube.

[0015] Furthermore, a time scale is provided on a section of the drainage tube between the sliding ring and the fixed ring. The larger the distance between the sliding ring and the fixed ring, the greater the extent to which the sliding ring expands the shaping net, that is, the larger the drainage cavity requiring drainage, and the longer the wound recovery time. The time scale is marked with an approximate wound recovery time that changes with the distance between the sliding ring and the fixed ring, which facilitates intuitive observation by medical staff so that the drainage tube can be removed according to the wound recovery situation.

[0016] The present invention provides a method for using an easy-to-pull-out anti-residual tissue effusion drainage system, comprising the following steps:

[0017] S1, inserting the drainage head with the shaping net and the foam sponge into the drainage cavity, manually controlling the sliding ring to move along the drainage tube, expanding the shaping net and the foam sponge to fill the drainage cavity, pinching the negative pressure balloon to generate negative pressure suction, so that the drainage fluid enters the drainage bag through the drainage head;

[0018] S2, as the drainage proceeds, the sliding ring slowly moves toward the fixed ring, the shaping net and the foam sponge gradually shrink, and the drainage bag is removed after the drainage is completed by observing the time scale;

[0019] S3, pulling the drainage tube to remove the drainage head, the shaping net and the foam sponge in the drainage cavity, the polymer synovial membrane at the junction of the foam sponge and the drainage tube reduces the removal resistance, and the removal process is completed.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: By providing a foamed sponge wrapped around the drainage head, the foamed sponge is made by expanding and foaming a porous foamed polymer material, the surface of the foamed sponge is covered with a shaping net, and an arc-shaped polymer synovial membrane is provided at the connection of the foamed sponge and the drainage tube and is wrapped outside the shaping net. It can keep the high-risk area dry while sucking out the drainage fluid, promote tissue healing, and ensure the integrity of the foamed sponge during the process of pulling out the foamed sponge at the end of drainage, prevent the foamed sponge from being crushed under the extrusion of the tissue and leaving non-absorbable residues in the drainage cavity, reduce the resistance during the process of pulling out the drainage head and the foamed sponge, ensure smooth extraction, reduce the tearing force on the tissue, avoid expanding the wound, and effectively improve the postoperative recovery speed. BRIEF DESCRIPTION OF THE DRAWINGS:

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments.

[0023] Figure 1 is the front view of the drainage head part of the easy-to-pull-out and residue-preventing tissue effusion drainage system according to Embodiment 1 of the present invention;

[0024] Figure 2 is the sectional view of the drainage head part of the easy-to-pull-out and residue-preventing tissue effusion drainage system according to Embodiment 1 of the present invention;

[0025] Figure 3 is the overall sectional view of the easy-to-pull-out and residue-preventing tissue effusion drainage system according to Embodiment 1 of the present invention;

[0026] Figure 4 is the front view of the drainage head part of the easy-to-pull-out and residue-preventing tissue effusion drainage system according to Embodiment 2 of the present invention;

[0027] Figure 5 is the sectional view of the drainage head part of the easy-to-pull-out and residue-preventing tissue effusion drainage system according to Embodiment 2 of the present invention;

[0028] Figure 6 is the overall sectional view of the easy-to-pull-out and residue-preventing tissue effusion drainage system according to Embodiment 2 of the present invention;

[0029] Figure 7 is the partial sectional view of the fixing ring part of the easy-to-pull-out and residue-preventing tissue effusion drainage system according to Embodiment 2 of the present invention;

[0030] Figure 8 is the partial sectional view of the front end of the drainage head of the easy-to-pull-out and residue-preventing tissue effusion drainage system according to Embodiment 1 or 2 of the present invention;

[0031] In the figure: 1. Drainage tube; 2. Drainage head; 3. Foaming sponge; 4. Shaping net; 5. Polymer synovium; 6. Negative pressure balloon; 7. Drainage bag; 8. Check valve; 9. Drainage hole; 10. Fixed ring; 11. Sliding ring; 12. Damping cavity; 13. Piston; 14. Piston rod; 15. Spring; 16. Throttle hole; 17. Damping liquid; 18. One-way damping valve; 181. Valve plate; 182. Compression spring; 19. Flow through hole; 20. Anti-slip ring; 21. Elastic washer; 22. Time scale Specific implementation manners:

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0033] Embodiment 1

[0034] As Figure 1 , Figure 2 , Figure 3 and Figure 8 shown, an easy-to-pull-out and anti-residual tissue effusion drainage system includes a drainage tube 1, a drainage head 2, and a foaming sponge 3 wrapped around the outside of the drainage head 2. The foaming sponge 3 is made by expanding and foaming a porous foaming polymer material. The material and parameters of the foaming sponge 3 are determined according to tissue compatibility and physical properties. Taking a PVA foaming sponge as an example, the apparent density can be adjusted to about 0.06 g / cm3 and the pore size can be adjusted to <1200 μm. The surface of the foaming sponge 3 is covered with a shaping net 4. The end of the shaping net 4 is fixed on a section of the drainage tube 2 that is not inserted into the foaming sponge 3. The drainage head 2 is inserted into the foaming sponge 3, and the drainage tube 1 is fixed to the foaming sponge 3. The fixing method can be, but is not limited to, adhesive bonding, suture stitching, etc. A polymer synovium 5 is provided at the connection between the foaming sponge 3 and the drainage tube 1. The polymer synovium 5 is arc-shaped and wraps around the outside of the shaping net 4 and the outside of the drainage tube 1. The drainage tube 1 is connected to a negative pressure balloon 6 and a drainage bag 7. Check valves 8 are provided in the drainage tube 1 at both ends of the negative pressure balloon 6. A plurality of drainage holes 9 are provided on the drainage head 2.

[0035] Preferably, the material of the shaping net 4 is a polymer plastic material including but not limited to polypropylene or nylon, with good elasticity and plasticity, facilitating the control of deformation.

[0036] Preferably, the polymer synovium 5 is made of polytetrafluoroethylene or PET film, with low roughness and a smooth surface, effectively reducing the friction with tissues and avoiding tearing.

[0037] The usage method of the easy-to-pull-out and anti-residual tissue effusion drainage system described in this embodiment is as follows:

[0038] Insert the drainage head 2 with the shaping net 4 and the foamed sponge 3 into the drainage cavity. The shaping net 4 and the foamed sponge 3 expand and fill the drainage cavity. Squeeze the negative pressure balloon 6 to generate negative pressure suction, so that the drainage fluid enters the drainage bag 7 through the drainage head 2. After the drainage is completed, remove the drainage bag 7, and pull the drainage tube 1 to pull out the drainage head 2, the shaping net 4 and the foamed sponge 3 in the drainage cavity. The polymer synovial membrane 5 at the joint of the foamed sponge 3 and the drainage tube 1 reduces the pulling resistance and completes the pulling process.

[0039] Embodiment 2

[0040] Such as Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 shown, an easy-to-pull-out and anti-residual tissue effusion drainage system includes a drainage tube 1, a drainage head 2, and a foamed sponge 3 wrapped outside the drainage head 2. The foamed sponge 3 is made by expanding and foaming a porous foamed polymer material. The material and parameters of the foamed sponge 3 are determined according to tissue compatibility and physical properties. Taking the PVA foamed sponge as an example, the apparent density can be adjusted to about 0.06 g / cm3, and the pore size can be adjusted to <1200 μm. The surface of the foamed sponge 3 is covered with a shaping net 4. The end of the shaping net 4 is fixed on a section of the drainage tube 1 that is not inserted into the foamed sponge 3. The drainage head 2 is inserted into the foamed sponge 3, and the drainage tube 1 and the foamed sponge 3 are fixed. The fixing method can be, but is not limited to, adhesive bonding, suture stitching, etc. A polymer synovial membrane 5 is provided at the connection between the foamed sponge 3 and the drainage tube 1. The polymer synovial membrane 5 is arc-shaped and wraps around the outside of the shaping net 4 and the outside of the drainage tube 1. The drainage tube 1 is connected to a negative pressure balloon 6 and a drainage bag 7. One-way valves 8 are provided in the drainage tubes 2 at both ends of the negative pressure balloon 6. A plurality of drainage holes 9 are provided on the drainage head 2.

[0041] Preferably, a fixing ring 10 and a sliding ring 11 are provided on the outer side of the drainage tube 1. A damping cavity 12 is provided inside the fixing ring 10. A piston 13 and a piston rod 14 are provided inside the damping cavity 12. A spring 15 is connected between the piston 13 and the inner wall of the damping cavity 12. The piston rod 14 passes through the spring 15 and is connected to the piston 13. A throttle hole 16 communicating with the damping cavity 12 on both sides of the piston 13 is provided inside the piston 13. The damping cavity 12 is filled with a damping liquid 17. One side of the sliding ring 11 is connected to the shaping net 4, and the other side of the sliding ring 11 is connected to the piston rod 14. The sliding ring 11 is used to slide along the drainage tube 1 to control the expansion size of the shaping net 4, so that medical staff can adjust the volume of the foamed sponge 3 when it is placed in the drainage cavity according to the size of the drainage cavity. The piston 13 is inside the damping cavity 12 and slowly moves under the thrust of the spring 15 and the resistance of the damping liquid 17. The expansion degree of the shaping net 4 gradually shrinks over time, which can ensure that the foamed sponge 3 is gradually compressed and reduced in size by the shaping net 4 as the tissue grows and recovers and the drainage cavity shrinks. After the drainage is completed, the volume of the foamed sponge 3 will shrink to be equivalent to the size of the drainage cavity after recovery, which is convenient for removal and reduces the damage to the tissue at the same time. The throttle hole 16 is used to communicate the damping cavity 12 at both ends of the piston 13 to allow the damping liquid 17 to flow from one side of the piston 13 to the other side when the piston 13 moves slowly.

[0042] Preferably, a one-way damping valve 18 is provided inside the throttle hole 16. The one-way damping valve 18 is used to ensure that during the slow movement of the piston 13, its opening degree changes with the pressure change on one side of the damping cavity 12 to ensure the stability of the moving speed of the piston 13. When the sliding ring 11 is pulled, the one-way damping valve 18 does not work, ensuring that the damping liquid 17 flows quickly from the side of the damping cavity 12 with the piston rod 14 to the side without the piston rod 14.

[0043] Preferably, the one-way damping valve 18 includes a valve plate 181 rotatably connected to the inner wall of the throttle hole 16. A compression spring 182 is connected between the valve plate 181 and the inner wall of the throttle hole 16. As the piston 13 moves, the valve plate 181 rotates against the force of the compression spring 182 with the pressure change on one side of the damping cavity 12, expanding the flow area of the throttle hole 16 to ensure the stable movement of the piston 13.

[0044] Preferably, a through-flow hole 19 communicating with the throttle hole 16 is provided on the piston rod 14. The through-flow hole 19 communicates with the damping cavity 12. The through-flow hole 19 is used to ensure the communication of the damping cavity 12 at both ends of the piston 13.

[0045] Preferably, the material of the shaping net 4 is a high molecular plastic material including but not limited to polypropylene or nylon, with good elasticity and plasticity, which is convenient for controlling deformation.

[0046] Preferably, the high molecular synovial membrane 5 is polytetrafluoroethylene or PET film, with low roughness and smooth surface, which effectively reduces the friction with the tissue and avoids causing tearing.

[0047] Preferably, an anti-slip ring 20 is provided on the outer side of the sliding ring 11, and an elastic washer 21 is provided on the contact surface between the sliding ring 11 and the drainage tube 1. The anti-slip ring 20 is used to facilitate the medical staff to manually pull the sliding ring 11 to move along the drainage tube 1, and the elastic washer 21 ensures that there is sufficient friction between the sliding ring 11 and the drainage tube 1.

[0048] Preferably, a time scale 22 is provided on a section of the drainage tube 1 between the sliding ring 11 and the fixing ring 10. The greater the distance between the sliding ring 11 and the fixing ring 10, the greater the degree to which the sliding ring 11 expands the shaping mesh 4, that is, the larger the drainage cavity that needs to be drained, and the longer the wound recovery time. The time scale 22 is marked with the approximate wound recovery time that changes with the distance between the sliding ring 11 and the fixing ring 10, which is convenient for medical staff to observe intuitively, so as to remove the drainage tube 1 according to the wound recovery situation.

[0049] The usage method of the easy-to-remove and anti-residual tissue effusion drainage system described in this embodiment is as follows:

[0050] S1. Insert the drainage head 2 with the shaping mesh 4 and the foaming sponge 3 into the drainage cavity, manually control the sliding ring 11 to move along the drainage tube 1, expand the shaping mesh 4 and the foaming sponge 3 and fill them in the drainage cavity, squeeze the negative pressure balloon 6 to generate negative pressure suction, so that the drainage fluid enters the drainage bag 7 through the drainage head 2;

[0051] S2. As the drainage progresses, the sliding ring 11 slowly moves towards the fixing ring 10, the shaping mesh 4 and the foaming sponge 3 gradually shrink. After observing the time scale 22 and confirming that the drainage is completed, remove the drainage bag 7;

[0052] S3. Pull the drainage tube 1 to remove the drainage head 2, the shaping mesh 4 and the foaming sponge 3 in the drainage cavity. The high molecular synovial membrane 5 at the joint between the foaming sponge 3 and the drainage tube 1 reduces the removal resistance, and the removal process is completed.

[0053] In summary, the easy-to-remove and anti-residual tissue effusion drainage system provided by the present invention solves the problems in the prior art that during the removal process after drainage, the already healed tissue is easily torn, resulting in the re-expansion of the wound, and some residual substances that cannot be absorbed by the human tissue are left in the drainage cavity, resulting in slow postoperative recovery and affecting the treatment effect.

[0054] The present invention has been described by way of example above, but the present invention is not limited to the above specific embodiments. Any modification or variation based on the present invention belongs to the scope of protection required by the present invention.

Claims

1. An easily extractable anti-residual tissue effusion drainage system, comprising a drainage tube, a drainage head, and a foamed sponge wrapped around the outside of the drainage head, wherein the foamed sponge is made by expanding and foaming a polymer material, and is characterized in that: The surface of the foamed sponge is covered with a shaping net, and the end of the shaping net is fixed on a section of the drainage tube that is not inserted into the foamed sponge. A polymer synovial membrane is provided at the connection between the foamed sponge and the drainage tube. The polymer synovial membrane is arc-shaped and wraps around the outside of the shaping net. The drainage tube is connected to a negative pressure balloon and a drainage bag. One-way valves are provided in the drainage tubes at both ends of the negative pressure balloon. A number of drainage holes are provided on the drainage head. Fixed rings and sliding rings are provided on the outside of the drainage tube. A damping cavity is provided inside the fixed ring. A piston and a piston rod are provided inside the damping cavity. A spring is connected between the piston and the inner wall of the damping cavity. The piston rod passes through the spring and is connected to the piston. A throttle hole communicating with the damping cavities on both sides of the piston is provided inside the piston. The damping cavity is filled with damping liquid. One side of the sliding ring is connected to the shaping net, and the other side of the sliding ring is connected to the piston rod. A one-way damping valve is provided in the throttle hole. A through-flow hole communicating with the throttle hole is provided on the piston rod, and the through-flow hole communicates with the damping cavity.

2. The easy-to-extract anti-residual tissue effusion drainage system according to claim 1, wherein: The one-way damping valve includes a valve plate rotatably connected to the inner wall of the throttle hole, and a compression spring is connected between the valve plate and the inner wall of the throttle hole.

3. The easy-to-extract anti-residual tissue effusion drainage system according to claim 1, characterized in that: The shaping net is made of a polymer plastic material including but not limited to polypropylene or nylon.

4. The easy-to-extract and anti-residual tissue effusion drainage system according to claim 1, characterized in that: The polymer synovial membrane is polytetrafluoroethylene or a PET film.

5. The easy-to-extract anti-residual tissue effusion drainage system according to claim 1, characterized in that: An anti-slip ring is provided on the outside of the sliding ring, and an elastic washer is provided on the contact surface between the sliding ring and the drainage tube.

6. The easy-to-extract and anti-residual tissue effusion drainage system according to claim 1, characterized in that: Time scales are provided on a section of the drainage tube between the sliding ring and the fixed ring.

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