Degradable fistula-proof section and peritoneal drainage composite tube

Abstract

The invention discloses an anti-fistula section degradable and peritoneal drainage composite tube, relates to the technical field of medical instruments, and aims to solve the problem that an existing intestinal anastomotic stoma anti-fistula device cannot protect the inner surface and the outer surface of an intestinal anastomotic stoma and cannot meet the peritoneal drainage requirement at the same time. The thread sealing unit is arranged on the overhanging section and used for fixing a pipeline and sealing a wound; the fistula-proof flow channel and the drainage flow channel are respectively butted with the external fistula-proof tube and the anti-blocking drainage tube of the inner extending section and are used for fistula-proof protection of the intestinal anastomotic stoma and drainage of substances in the abdominal cavity; the external fistula-preventing tube is matched with the fistula-preventing film tube, negative-pressure flushing is carried out on the intestinal anastomotic stoma, fixed-point medicine treatment or endoscope exploration is carried out, and the healing condition of the anastomotic stoma is tracked; the fistula-proof film tube is made of degradable materials and does not need to be taken out through a secondary operation, and the burden of a patient is reduced; the device has the advantages that multiple functions of protection and drainage are integrated, implantation can be achieved only through one wound edge, wound reduction is achieved, and a safer and more convenient scheme is provided for the intestinal anastomotic stoma operation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a degradable and peritoneal drainage composite tube for the anti-fistula section. Background Art

[0002] With the continuous progress of surgical techniques, the anastomosis technique in intestinal surgery has become increasingly mature. However, the occurrence of intestinal anastomotic fistula is still one of the common and serious complications after surgery, which can lead to abdominal infection, abscess formation, and even endanger life. Therefore, preventing the occurrence of intestinal anastomotic fistula and improving the postoperative rehabilitation effect of patients are one of the key concerns in current gastrointestinal medicine.

[0003] (1) Deficiencies of existing intestinal anastomotic anti-fistula devices: Currently, the devices used to prevent intestinal anastomotic fistula usually require placing a section of anti-fistula device at the anastomosis site to assist the healing of the anastomosis. However, such devices are generally made of non-degradable materials, and patients need to undergo a second operation to remove the anti-fistula device after the anastomosis heals, which increases the pain and economic burden of the patients. At the same time, there are also risks of more infections and complications due to the second operation. To solve this problem, fully degradable intestinal anastomotic anti-fistula devices have gradually attracted attention. This type of fully degradable anti-fistula device can naturally degrade and be absorbed or excreted by the human body after the anastomosis heals, without the need for a second operation, greatly reducing the pain of the patients and the complexity of postoperative management. However, the currently available fully degradable anti-fistula devices on the market are basically inserted into the inner cavity of the intestinal anastomosis during the operation. By isolating the anastomosis from the feces or irritating body fluids in the intestinal digestion, the anastomosis is protected from irritation, thereby promoting the healing of the anastomosis. However, their functions are relatively single and lack versatility; and they all fix the inner cavity of the intestinal anastomosis, while there are few anti-fistula devices that cooperate with the inner cavity of the intestine to fix the outer surface of the intestinal anastomosis at the same time.

[0004] In the case of patients with poor healing of intestinal anastomosis, the success rate of successfully healing the intestinal anastomosis only through the anti-fistula device placed in the inner cavity of the intestine is extremely low. Therefore, anti-fistula devices placed inside and outside the intestinal anastomosis need to cooperate to improve the healing effect and success rate of the intestinal anastomosis.

[0005] (2) Necessity and existing problems of peritoneal drainage: After intestinal anastomosis surgery, the abdominal cavity often secretes a large amount of body fluids (such as exudate, blood, etc.). If not drained in time, it may lead to infections, inflammatory reactions, or other complications. Therefore, a drainage tube is usually placed in the abdominal cavity during the operation to drain the body fluids out of the body.

[0006] Moreover, for patients with poor healing of intestinal anastomotic stomas, the healing time of the anastomotic stoma is longer, which is likely to cause local inflammation in the abdominal cavity, resulting in abdominal effusion, external bleeding from the intestinal anastomotic stoma, or the production of other inflammatory substances, all of which are not conducive to the rehabilitation treatment after intestinal surgery. In addition, it is very difficult to monitor the external bleeding from the intestinal anastomotic stoma. Usually, it can only be observed when there is excessive abdominal effusion or the production of other inflammatory substances in the abdominal cavity, leading to incomplete metabolism and absorption. Only secondary treatment measures such as minimally invasive surgical drainage in the abdominal cavity or dealing with wound bleeding can be taken, but this also increases the burden on the patient.

[0007] To address this situation, in order to improve the success rate of intestinal anastomotic stoma healing and meet the drainage needs to reduce inflammation, multiple incisions need to be made on the abdominal wall surface to place an anti-fistula device on the external surface of the intestinal anastomotic stoma and a drainage tube. This not only increases the postoperative pain of the patient but also may increase the risk of infection. The creation of multiple incisions also causes psychological pressure on the patient, affecting the postoperative rehabilitation effect and quality of life.

[0008] Based on the above problems, it is necessary to develop a composite tube device integrating abdominal drainage and a degradable anti-fistula segment. It can not only reduce the postoperative complications of intestinal anastomosis, improve the healing effect of the intestinal anastomotic stoma, shorten the healing time, and ultimately increase the healing success rate, but also significantly reduce the postoperative pain and nursing burden of the patient, improve the quality of life and physical rehabilitation effect of the patient, conform to the trend of modern surgical procedures towards minimally invasive and user-friendly development, greatly improve the rehabilitation effect of the patient, reduce the waste of medical resources, and promote the technological progress in the field of intestinal surgery anti-fistula and drainage.

[0009] In summary, it is found that the existing technology has at least the following technical problems:

[0010] The existing anti-fistula devices for intestinal anastomotic stomas have the technical problems of being unable to protect both the internal and external surfaces of the intestinal anastomotic stoma simultaneously and meet the requirements of abdominal drainage. Summary of the Invention

[0011] The purpose of the present invention is to provide a composite tube with a degradable anti-fistula segment and abdominal drainage to solve the technical problems of the existing anti-fistula devices for intestinal anastomotic stomas, which are unable to protect both the internal and external surfaces of the intestinal anastomotic stoma simultaneously and meet the requirements of abdominal drainage.

[0012] The many technical effects that can be produced by the preferred technical solutions provided by the present invention are described in detail below.

[0013] To solve the above technical problems, the present invention provides the following technical solutions:

[0014] The present invention provides a composite tube with a degradable anti-fistula section and abdominal drainage, including an outer extension section provided with a threaded sealing unit; the threaded sealing unit is used to fix the outer extension section in the wound and seal the space between the outer extension section and the wound; multiple flow channels arranged along the axis are provided inside the tube of the outer extension section, including an anti-fistula flow channel for discharging substances released outside the intestinal anastomosis to the outside of the body, and a drainage flow channel for discharging substances generated in the abdominal cavity to the outside of the body; and an inner extension section, the inner extension section includes an extra-intestinal anti-fistula tube and an anti-blocking drainage tube respectively cooperating with the anti-fistula flow channel and the drainage flow channel, and the bending shapes and placement angles of the extra-intestinal anti-fistula tube and the anti-blocking drainage tube can be adjusted and fixed arbitrarily; one end of the extra-intestinal anti-fistula tube is inserted and fixed into the anti-fistula flow channel; the drainage outlet of the anti-blocking drainage tube is inserted and fixed into the drainage flow channel, and the drainage inlet is used to extend into the abdominal cavity for drainage; and a degradable anti-fistula film tube, a first branch interface is provided on the circumference between the two ends of the anti-fistula film tube, and the first branch interface is sleeved on the outer side of the other end of the extra-intestinal anti-fistula tube; the two ends of the anti-fistula film tube communicate with each other, and bundling rings are provided on the outer sides of both ends, the bundling rings are elastic, and when the anti-fistula film tube is sleeved outside the intestinal anastomosis, it cooperates with an inner anti-fistula tube placed in the intestinal lumen of the intestinal anastomosis to bundle the two sides of the intestinal anastomosis, so that the intestinal anastomosis cannot move back and forth between the anti-fistula film tube and the inner anti-fistula tube; the diameter of the extra-intestinal anti-fistula tube is larger than that of the anti-blocking drainage tube, and the extra-intestinal anti-fistula tube passes through the anti-fistula flow channel of the outer extension section, and a flushing and negative pressure tube is inserted from the outside of the wound to flush the intestinal anastomosis or an endoscope is inserted to explore the healing condition of the intestinal anastomosis or medicament is injected; support rings are provided on both sides adjacent to the first branch interface, and the diameter of the support ring is larger than that of the bundling ring, and the support ring is used to provide a space for flushing or draining the intestinal anastomosis, and to prevent the intestinal anastomosis from generating inflammation or bleeding due to excessive compression, and to promote the healing of the intestinal anastomosis.

[0015] In one embodiment, a liquid injection flow channel is further provided inside the tube of the outer extension section, and the anti-fistula flow channel and the drainage flow channel are arranged along the axis of the outer extension section; the inner extension section further includes a liquid injection tube cooperating with the liquid injection flow channel, and the bending shape and placement angle of the liquid injection tube can be adjusted and fixed arbitrarily; one end of the liquid injection tube is inserted and fixed into the liquid injection flow channel; a second branch interface is further provided on the circumference between the two ends of the anti-fistula film tube, and the second branch interface is sleeved on the outer side of the other end of the liquid injection tube; the circumferential angle between the second branch interface and the first branch interface is greater than 90 degrees; when installing the anti-fistula film tube, the first branch interface is located below the human body height direction, and the second branch interface is located above the human body height direction, and the flushing liquid or medicament entering the anti-fistula film tube from the liquid injection tube flows downward to contact the intestinal anastomosis, and then is discharged to the outside of the body through the extra-intestinal anti-fistula tube by gravity drive.

[0016] In one embodiment, a corrugated section is provided between the two ends of the liquid injection tube, and the corrugated section enables arbitrary adjustment and fixation of the bending shape and placement angle of the liquid injection tube.

[0017] In one embodiment, corrugated sections are provided between the two ends of the parenteral anti-fistula tube and the anti-blockage drainage tube, and the corrugated sections enable arbitrary adjustment and fixation of the bending shapes and placement angles of the parenteral anti-fistula tube and the anti-blockage drainage tube.

[0018] In one embodiment, an anti-blockage section is provided at one end of the anti-blockage drainage tube away from the drainage channel, and the anti-blockage section surrounds the drainage inlet of the anti-blockage drainage tube; the anti-blockage section includes first side flow holes, second side flow holes, and third side flow holes provided on the circumferential side wall, the diameter of the first side flow holes is larger than that of the second side flow holes, and the diameter of the second side flow holes is larger than that of the third side flow holes; a plurality of the first side flow holes are arranged in a straight line along the axial direction of the anti-blockage section and form a single row, and a plurality of rows of the first side flow holes are provided along the circumferential direction of the anti-blockage section; the second side flow holes and the third side flow holes are combined into a single row and are arranged alternately in a straight line along the axial direction of the anti-blockage section, and a plurality of rows of the second side flow holes and the third side flow holes are provided along the circumferential direction of the anti-blockage section; a plurality of rows of the second side flow holes and the third side flow holes and a plurality of rows of the first side flow holes are arranged alternately along the circumferential direction of the anti-blockage section; and the centers of the first side flow holes and the centers of the third side flow holes are on the same circumferential surface; through the arrangement of three different diameters of side flow holes and their alternate arrangement positions in the axial and circumferential directions, when the anti-blockage drainage tube is connected to a negative pressure instrument for negative pressure suction, multiple-directional forces are generated by the pressure difference between the multiple side flow holes to dredge the side flow holes or prevent a large area of the side flow holes from being occupied by blockage substances.

[0019] In one embodiment, the threaded sealing unit includes a flexible sealing sleeve with elasticity, a positioning retainer, a detachable disinfection tablet, and a locking ring; both ends of the extended section are an operating end and an inner probing end respectively. The flexible sealing sleeve is fixedly connected between the two ends of the extended section, and the flexible sealing sleeve expands circumferentially while extending axially from the inner probing end; a sealing thread is provided on the outer wall surface of the extended section adjacent to the operating end, and the locking ring is sleeved outside the extended section and connected to the sealing thread; the positioning retainer is hermetically sleeved on the outer wall surface between the flexible sealing sleeve and the locking ring; a through disinfection groove is provided on the end surface of the positioning retainer, and the disinfection tablet is arranged between the positioning retainer and the locking ring; after inserting the extended section into the wound, make the positioning retainer contact the outer skin of the wound, rotate the locking ring, so that the locking ring applies pressure to the positioning retainer, and make the flexible sealing sleeve extrude outwards. Through the elasticity and sealing performance of the flexible sealing sleeve, circumferential sealing of the inner side of the abdominal cavity of the wound and fixing of the extended section are respectively achieved, and circumferential sealing of the outer skin of the wound is achieved through the positioning retainer and the disinfection tablet; a sustained-release gel for disinfection is provided on the disinfection tablet, and the sustained-release gel penetrates into the skin contacted by the positioning retainer through the disinfection groove, so as to disinfect the outer skin of the wound.

[0020] In one embodiment, a plurality of disinfection grooves are provided on the positioning retainer, and a plurality of the sustained-release gels are also provided on the disinfection tablet corresponding to the quantity and positions of the disinfection grooves; an opening is provided between two adjacent sustained-release gels for the disinfection tablet to be opened or combined, so as to replace the disinfection tablet while only loosening but not removing the locking ring.

[0021] In one embodiment, water-based skin-friendly silica gels are provided on both end surfaces of the positioning retainer, and a plurality of arc-shaped positioning strips are provided on the side facing the wound for increasing the friction force to maintain the positioning of the extended section.

[0022] In one embodiment, a replaceable sealing interface part is further included. A sealing groove is provided on the peripheral wall at one end of the sealing interface part, and a sealing ring is provided on the sealing groove. A plurality of connection ports are provided at the other end of the sealing interface part, and the sizes and positions of the plurality of connection ports are respectively arranged corresponding to a plurality of the flow channels; the sealing interface part is inserted into the operating end of the extended section through the end with the sealing ring installed; extension pipes nested and docked with the plurality of flow channels are respectively provided at one ends of the plurality of connection ports docked with the operating end of the extended section.

[0023] In one embodiment, the inner part of the outer extension section has a sheet-like support structure, and a plurality of circular discs are arranged at equal intervals along the axial direction inside the tube to support the tube of the outer extension section; a plurality of the flow channels pass through the plurality of circular discs inside the tube of the outer extension section and penetrate through the two ends of the outer extension section.

[0024] The beneficial effects of the present invention are as follows:

[0025] The anti-fistula segment degradable and abdominal drainage composite tube combines the extraintestinal anti-fistula tube, the anti-fistula film tube outside the intestine, and the anti-blocking drainage tube together to form a compact composite tube structure. It is used in cooperation with the inner anti-fistula tube implanted into the intestinal anastomosis lumen during the operation, solving the problem that the existing intestinal anastomosis anti-fistula device cannot protect the inner and outer surfaces of the intestinal anastomosis at the same time and meet the abdominal drainage requirements.

[0026] (1) Achieve multi-functional integration: The present invention integrates the anti-fistula and drainage functions into the same composite tube. Through the compact and reasonable structure of the anti-fistula flow channel and the drainage flow channel, it realizes the anti-fistula protection of the outer surface of the intestinal anastomosis and the drainage of substances in the abdominal cavity; effectively reduces the limitations of multiple incisions required in traditional treatments and the single function of a single device, but the need to place multiple devices, and improves the comprehensive treatment effect.

[0027] (2) Have a degradable anti-fistula segment: The anti-fistula segment at least includes an extraintestinal anti-fistula tube and an anti-fistula film tube, and the anti-fistula film tube among them is made of a degradable material, so that it can automatically degrade after the intestinal anastomosis heals, without the need for a second operation to remove it, greatly reducing the postoperative pain, medical risks and economic burden of patients; in addition, through the combined protection of the intestinal anastomosis on the inner and outer sides of the intestine, it promotes the healing of the intestinal anastomosis and also improves the success rate of healing. After the anti-fistula film tube degrades, it automatically detaches from the extraintestinal anti-fistula tube. The extraintestinal anti-fistula tube, the anti-blocking drainage tube and the outer extension section can all be taken out from the incision without laparotomy. This degradable structure avoids the long-term implantation required by traditional anti-fistula devices, and also has a convenient removal method, reducing the chance of infection and improving the quality of life of patients.

[0028] (3) Reduce the number of abdominal incisions during the operation: The structure of the composite tube enables the patient to complete the functions of anti-fistula protection on the outer side of the intestinal anastomosis, separate drainage, monitoring and treatment functions on the outer side of the intestinal anastomosis, and abdominal drainage function with only one incision, also reducing the number of incisions, alleviating the surgical trauma, nursing burden and psychological pressure of the patient, thereby improving the quality of life and the rehabilitation speed after the operation, and comprehensively improving the success rate of healing of the intestinal anastomosis.

[0029] (4) Adjustable external intestinal fistula prevention tube and anti-blockage drainage tube: The bending shape and placement angle of the external intestinal fistula prevention tube and the anti-blockage drainage tube can be adjusted according to specific situations. This flexibility helps to accurately position and maximize the protection of the outer surface of the intestinal anastomosis. At the same time, the placement position can be flexibly adjusted to make the drainage effect more ideal, avoiding complications caused by improper tube position.

[0030] (5) Functions of providing healing status monitoring, point-to-point drug administration, flushing and negative pressure suction treatment: Through the anti-fistula flow channel of the extension section, the external intestinal fistula prevention tube can achieve the monitoring of the healing status of the intestinal anastomosis, point-to-point drug administration, flushing and negative pressure suction treatment to promote healing. The structure of the cooperation between the external intestinal fistula prevention tube and the anti-fistula film tube enables endoscopic exploration and drug injection, further enhancing the monitoring of the recovery status of the intestinal anastomosis and the treatment effect.

[0031] (6) Design of the support ring structure: The setting of the support ring on the anti-fistula film tube can effectively prevent the intestinal anastomosis from inflammation or bleeding due to excessive pressure. The reasonable layout of the support ring provides sufficient space for the intestinal anastomosis to drain fluid, flush and introduce drugs, thus promoting the healing of the intestinal anastomosis and protecting the anastomosis from external excessive pressure, excessive stress generated by intestinal excreta and intestinal peristalsis.

[0032] In summary, the anti-fistula segment degradable and peritoneal drainage composite tube of the present invention has multiple advantages such as anti-fistula protection, peritoneal drainage, wound reduction, degradable anti-fistula structure, and avoidance of secondary laparotomy surgery, which can greatly improve the postoperative rehabilitation effect of patients and provide a safer and more efficient treatment plan for clinical intestinal anastomosis surgery. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 It is a schematic structural diagram of the anti-fistula segment degradable and peritoneal drainage composite tube of the first embodiment of the present invention with an external intestinal fistula prevention tube and an anti-blockage drainage tube arranged;

[0035] Figure 2 It is a schematic structural diagram of the anti-fistula segment degradable and peritoneal drainage composite tube of the first embodiment of the present invention with an external intestinal fistula prevention tube, an anti-blockage drainage tube, an injection tube and a sealing interface part arranged;

[0036] Figure 3 It is a partial assembly structural diagram of the extension section, the threaded sealing unit and the sealing interface part of the first embodiment of the present invention;

[0037] Figure 4 It is a schematic top - view structure diagram of the extension section of the first embodiment of the present invention;

[0038] Figure 5 It is a schematic front - view structure diagram of the anti - clogging drainage tube of the first embodiment of the present invention;

[0039] Figure 6 It is a schematic structure diagram of the partial section of the extension section of the second embodiment of the present invention.

[0040] Among them, the reference numerals are as follows:

[0041] 1. Extension section; 11. Operation end; 12. Inner exploration end; 13. Anti - fistula flow channel; 14. Drainage flow channel; 15. Liquid injection flow channel; 16. Sealing thread; 17. Disc;

[0042] 2. Inner extension section;

[0043] 3. Extra - intestinal anti - fistula tube;

[0044] 4. Anti - clogging drainage tube; 41. Drainage outlet; 42. Drainage inlet; 43. Anti - clogging section; 431. First side flow hole; 432. Second side flow hole; 433. Third side flow hole;

[0045] 5. Liquid injection tube;

[0046] 6. Anti - fistula film tube; 61. First branch interface; 62. Second branch interface; 63. Binding ring; 64. Support ring;

[0047] 7. Corrugated section;

[0048] 8. Thread sealing unit; 81. Flexible sealing sleeve; 811. Reinforcing ring; 82. Positioning stop; 821. Disinfection groove; 822. Arc - shaped positioning strip; 83. Disinfection tablet; 831. Sustained - release gel; 832. Opening; 84. Locking ring;

[0049] 9. Sealing interface part; 91. Sealing ring; 92. Connection port; 93. Extension tube; 94. Anti - slip convex strip. Detailed implementation manners

[0050] 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.

[0051] In the specific implementation manner, a composite tube with a degradable anti-fistula section and abdominal drainage is provided. The outer extension section has a threaded sealing unit for fixing the tube and sealing the wound; and an anti-fistula flow channel and a drainage flow channel are provided, which are respectively docked with the extra-intestinal anti-fistula tube and the anti-blocking drainage tube of the inner extension section for anti-fistula protection of the intestinal anastomosis and drainage of substances in the abdominal cavity; moreover, the extra-intestinal anti-fistula tube cooperates with the anti-fistula film tube to perform negative pressure flushing, targeted drug administration treatment or endoscopic exploration on the intestinal anastomosis, and track the healing condition of the anastomosis; the anti-fistula film tube is made of a degradable material and does not need to be removed by a second operation, reducing the burden on the patient; it has the advantages of multi-functional integration of protection and drainage, and can be implanted with only one wound edge, realizing wound reduction, etc., providing a safer and more convenient solution for intestinal anastomosis surgery; effectively solving the technical problem that the existing intestinal anastomosis anti-fistula device cannot protect the inner and outer surfaces of the intestinal anastomosis at the same time and meet the requirement of abdominal drainage.

[0052] The first embodiment of the composite tube with a degradable anti-fistula section and abdominal drainage is as Figure 1 and Figure 3As shown in the figure, it includes an extension section 1, and a threaded sealing unit 8 is provided on the extension section 1; the threaded sealing unit 8 is used to fix the extension section 1 in the wound and seal the space between the extension section 1 and the wound; a plurality of flow channels arranged along the axis are provided inside the tube of the extension section 1, including an anti-fistula flow channel 13 for discharging substances released outside the intestinal anastomosis to the outside of the body, and a drainage flow channel 14 for discharging substances generated in the abdominal cavity to the outside of the body; and an inner extension section 2, the inner extension section 2 includes an extraintestinal anti-fistula tube 3 and a blockage-proof drainage tube 4 that cooperate with the anti-fistula flow channel 13 and the drainage flow channel 14 respectively, and the bending shapes and placement angles of the extraintestinal anti-fistula tube 3 and the blockage-proof drainage tube 4 can be arbitrarily adjusted and fixed; one end of the extraintestinal anti-fistula tube 3 is inserted and fixed inside the anti-fistula flow channel 13; the drainage outlet 41 of the blockage-proof drainage tube 4 is inserted and fixed inside the drainage flow channel 14, and the drainage inlet 42 is used to extend into the abdominal cavity for drainage; and a degradable anti-fistula film tube 6, a first branch interface 61 is provided on the circumference between the two ends of the anti-fistula film tube 6, and the first branch interface 61 is sleeved outside the other end of the extraintestinal anti-fistula tube 3; the two ends of the anti-fistula film tube 6 communicate with each other, and bundling rings 63 are provided on the outer sides of both ends, and the bundling rings 63 are elastic. When the anti-fistula film tube 6 is sleeved outside the intestinal anastomosis, it cooperates with the inner anti-fistula tube placed in the intestinal lumen of the intestinal anastomosis to bundle the two sides of the intestinal anastomosis, so that the intestinal anastomosis cannot move back and forth between the anti-fistula film tube 6 and the inner anti-fistula tube; the diameter of the extraintestinal anti-fistula tube 3 is larger than that of the blockage-proof drainage tube 4, and the extraintestinal anti-fistula tube 3 passes through the anti-fistula flow channel 13 of the extension section 1, and at the same time extends into the wound from the outside to flush the intestinal anastomosis or a negative pressure tube, or extends an endoscope to explore the healing condition of the intestinal anastomosis or inject medicine; support rings 64 are provided on both sides adjacent to the first branch interface 61, and the diameter of the support rings 64 is larger than that of the bundling rings 63. The support rings 64 are used to provide a space for flushing or draining the intestinal anastomosis, and to prevent the intestinal anastomosis from getting inflamed or oozing blood due to excessive compression, and to promote the healing of the intestinal anastomosis.

[0053] Wherein, corrugated sections 7 are provided between the two ends of the extraintestinal anti-fistula tube 3 and the blockage-proof drainage tube 4 respectively, and the corrugated sections 7 enable the bending shapes and placement angles of the extraintestinal anti-fistula tube 3 and the blockage-proof drainage tube 4 to be arbitrarily adjusted and fixed.

[0054] The degradable anti-fistula film tube 6 is made of a material that can be automatically degraded and absorbed in the body, such as: poly-p-dioxanone, poly(lactide-ethylene glycol) copolymer, poly(glycolide-lactide) copolymer, poly(L-lactide-D-lactide) copolymer, poly(lactide-caprolactone) copolymer, and degradable polyurethane. Thus, the function that the anti-fistula film tube 6 placed during the operation can be self-degraded is realized, so that the healing of the intestinal anastomosis is promoted under the combined protection of the inside and outside of the intestine for the intestinal anastomosis, and the success rate of healing is also improved. After the anti-fistula film tube 6 degrades, it automatically detaches from the extraintestinal anti-fistula tube 3, and the extraintestinal anti-fistula tube 3, the blockage-proof drainage tube 4 and the extension section 1 can all be taken out of the wound without laparotomy.

[0055] The anti-fistula degradable and abdominal drainage composite tube combines the extraintestinal anti-fistula tube 3 outside the intestine, the anti-fistula film tube 6, and the anti-blocking drainage tube 4 together to form a compact composite tube structure. When cooperating with the internal anti-fistula tube implanted into the lumen of the intestinal anastomosis during the operation, it solves the problem that the existing intestinal anastomosis anti-fistula devices cannot protect both the inner and outer surfaces of the intestinal anastomosis and meet the abdominal drainage requirements at the same time, and achieves the following multiple functions and effects:

[0056] Realize multi-functional integration: The present invention integrates the anti-fistula and drainage functions into the same composite tube. Through the compact and reasonable structures of the anti-fistula flow channel 13 and the drainage flow channel 14, it realizes the anti-fistula protection of the outer surface of the intestinal anastomosis and the drainage of substances in the abdominal cavity; effectively reduces the limitations of the traditional treatment that requires multiple incisions and single devices with single functions but needs to place multiple devices, and improves the comprehensive treatment effect.

[0057] Have a degradable anti-fistula section: The anti-fistula section at least includes the extraintestinal anti-fistula tube 3 and the anti-fistula film tube 6, and the anti-fistula film tube 6 among them is made of degradable material, so that it can automatically degrade after the intestinal anastomosis heals, without the need for a second operation to remove it, greatly reducing the postoperative pain, medical risks and economic burden of the patient; this degradable structure avoids the long-term implantation required by traditional anti-fistula devices, and also has a convenient removal method, reducing the chance of infection and improving the quality of life of the patient.

[0058] Reduce the number of abdominal incisions during the operation: The structure of the composite tube enables the patient to complete the functions of anti-fistula protection on the outside of the intestinal anastomosis, separate drainage, monitoring and treatment functions on the outside of the intestinal anastomosis, and abdominal drainage with only one incision, also reducing the number of incisions, alleviating the surgical trauma, nursing burden and psychological pressure of the patient, thus improving the quality of life and rehabilitation speed after surgery, and comprehensively improving the healing success rate of the intestinal anastomosis.

[0059] Adjustable extraintestinal anti-fistula tube 3 and anti-blocking drainage tube 4: The bending shapes and placement angles of the extraintestinal anti-fistula tube 3 and the anti-blocking drainage tube 4 can be adjusted according to specific situations. This flexibility helps to accurately position and maximize the protection of the outer surface of the intestinal anastomosis, and at the same time can flexibly adjust the placement position to make the drainage effect more ideal, avoiding complications caused by improper pipeline positions.

[0060] Have the functions of providing monitoring of the healing condition, point-to-point drug treatment, and irrigation and negative pressure suction treatment: The extraintestinal anti-fistula tube 3 can realize the monitoring of the healing condition of the intestinal anastomosis, point-to-point drug treatment, irrigation and negative pressure suction treatment through the anti-fistula flow channel 13 of the outer extension section 1, promoting healing; the structure of its cooperation between the extraintestinal anti-fistula tube 3 and the anti-fistula film tube 6 enables endoscopic exploration and drug injection, further enhancing the monitoring and treatment effects of the recovery condition of the intestinal anastomosis.

[0061] Design of the support ring 64 structure: The provision of the support ring 64 on the anti-fistula film tube 6 can effectively prevent the intestinal anastomosis from inflammation or bleeding due to excessive compression. The reasonable layout of the support ring 64 provides sufficient space for the intestinal anastomosis to drain fluid, be flushed, and have medicine introduced, thereby promoting the healing of the intestinal anastomosis and protecting the anastomosis from external excessive pressure, excessive stress generated by intestinal excreta and intestinal peristalsis.

[0062] As one of the optional implementation manners,

[0063] To facilitate flushing the outer surface of the intestinal anastomosis and introducing medicine through the space created by the support ring 64 of the anti-fistula film tube 6, and to solve the problem that it is impossible to monitor the liquid reception and healing conditions of the intestinal anastomosis through an endoscope when introducing medicine. In this embodiment, as Figure 2 and Figure 4 shown, a liquid injection flow channel 15 is further provided inside the outer extension section 1, and is arranged along the axis of the outer extension section 1 together with the anti-fistula flow channel 13 and the drainage flow channel 14; the inner extension section 2 further includes a liquid injection tube 5 that cooperates with the liquid injection flow channel 15, and the bending shape and placement angle of the liquid injection tube 5 can be adjusted and fixed arbitrarily; one end of the liquid injection tube 5 is inserted and fixed inside the liquid injection flow channel 15; a second branch interface 62 is further provided on the circumference between the two ends of the anti-fistula film tube 6, and the second branch interface 62 is sleeved outside the other end of the liquid injection tube 5; the circumferential angle between the second branch interface 62 and the first branch interface 61 is greater than 90 degrees.

[0064] When installing the anti-fistula film tube 6, the first branch interface 61 is located below the human body height direction, and the second branch interface 62 is located above the human body height direction. The flushing liquid or medicine entering the anti-fistula film tube 6 from the liquid injection tube 5 flows downward to contact the intestinal anastomosis, and then is discharged out of the body through the gravity drive into the extra-intestinal anti-fistula tube 3. This facilitates flushing the outer surface of the intestinal anastomosis and introducing medicine through the space created by the support ring 64 of the anti-fistula film tube 6, and realizing the function of monitoring the liquid reception and healing conditions of the intestinal anastomosis through an endoscope when introducing medicine, reducing the steps and required treatment time during the rehabilitation treatment process, and contributing to improving the patient's comfort and rehabilitation effect.

[0065] Furthermore, a corrugated section 7 is provided between the two ends of the liquid injection tube 5, and the corrugated section 7 enables the bending shape and placement angle of the liquid injection tube 5 to be adjusted and fixed arbitrarily.

[0066] During application, the structure of the corrugated section 7 is similar to that of the bellows in terms of structure and function. However, by providing the corrugated section 7 on the external intestinal fistula prevention tube 3, the anti-blockage drainage tube 4, and the liquid injection tube 5, it is convenient for the fistula prevention tube, the anti-blockage drainage tube 4, and the liquid injection tube 5 to conform to the position of the intestinal anastomosis during the intraoperative implantation process, coordinate with the positions and spaces of the surrounding organs, and make the fistula prevention tube, the anti-blockage drainage tube 4, and the liquid injection tube 5 assume the most suitable shape for placement in the abdominal cavity, reducing the foreign body sensation of the implanted tubes in the abdominal cavity, while avoiding interfering with the operation of the surrounding organs and affecting other body functions during the rehabilitation process, and synergistically improving the treatment effect of the degradable and abdominal drainage composite tube with an anti-fistula section on the intestinal anastomosis.

[0067] To achieve the flexible fixation and sealing function of the extension section 1 on the wound and solve the problems of insufficient sealing and excessive fixation force resulting in a foreign body sensation that occur when traditional tubular medical devices are inserted into the wound, this embodiment is as follows Figure 1 and Figure 3 As shown, the threaded sealing unit 8 includes an elastic flexible sealing sleeve 81, a positioning stop 82, a detachable disinfection sheet 83, and a locking ring 84; the two ends of the extension section 1 are respectively an operation end 11 and an internal exploration end 12, and the flexible sealing sleeve 81 is fixedly connected between the two ends of the extension section 1, and the flexible sealing sleeve 81 extends axially from the internal exploration end 12 while expanding outward in the circumferential direction; a sealing thread 16 is provided on the outer wall surface of the extension section 1 adjacent to the operation end 11, and the locking ring 84 is sleeved outside the extension section 1 and connected to the sealing thread 16; the positioning stop 82 is hermetically sleeved on the outer wall surface between the flexible sealing sleeve 81 and the locking ring 84; a through disinfection groove 821 is provided on the end surface of the positioning stop 82, and the disinfection sheet 83 is provided between the positioning stop 82 and the locking ring 84; after inserting the extension section 1 into the wound, make the positioning stop 82 contact the outer skin of the wound, rotate the locking ring 84, so that the locking ring 84 applies pressure to the positioning stop 82, and let the flexible sealing sleeve 81 be extruded outward. Through the elasticity and sealing performance of the flexible sealing sleeve 81, the circumferential sealing of the abdominal cavity inside the wound and the fixation of the extension section 1 are respectively achieved, and the circumferential sealing of the outer skin of the wound is achieved through the positioning stop 82 and the disinfection sheet 83; a sustained-release gel 831 for disinfection is provided on the disinfection sheet 83, and the sustained-release gel 831 penetrates into the skin contacted by the positioning stop 82 through the disinfection groove 821 to achieve disinfection of the outer skin of the wound.

[0068] During application, by setting up the threaded seal unit 8 composed of an elastic and soft flexible seal sleeve 81, a positioning stop 82, a disinfection tablet 83, and a locking ring 84, flexible fixation and efficient sealing of the outer extension section 1 on the wound are achieved; the flexible seal sleeve 81 can be extruded outward under the pressure of the locking ring 84, thereby providing stable circumferential sealing to the inner side of the abdominal cavity of the wound, while avoiding the foreign body sensation caused by excessive fixing force. By rotating the locking ring 84, the fixing force can be flexibly adjusted, which can improve the comfort of the patient, improve the quality of life of the patient, and thus improve the rehabilitation effect; through the positioning stop 82 combined with the disinfection tablet 83 with a sustained-release gel 831, slow and continuous penetration disinfection of the skin outside the wound is carried out to reduce the risk of infection; the overall structure of the threaded seal unit 8 is flexible and has strong sealing performance, significantly improving the clinical application safety of the device and the comfort of the patient.

[0069] When sealing the wound, at least one reinforcing ring 811 is provided on the peripheral wall of the flexible seal sleeve 81 to enhance the circumferential expansion force and axial compression force of the flexible seal sleeve 81, thereby enhancing the elasticity and strengthening the sealing performance.

[0070] When removing the outer extension section 1 and the inner extension section 2, it is necessary to first loosen the locking ring 84 and the positioning stop 82 of the threaded seal unit 8, then directly place a hand against the skin near the wound, and use the other hand to draw out the outer extension section 1. During the drawing process, since the flexible seal sleeve 81 is a soft and elastic film, when drawing out the outer extension section 1, the flexible seal sleeve 81 can be turned inside out. The position of the end of the flexible seal sleeve 81 connected to the outer extension section 1 is reversed from the other end in the axial direction of the outer extension section 1. The end of the flexible seal sleeve 81 connected to the outer extension section 1 comes out first, and the other end of the flexible seal sleeve 81 comes out later, so that the flexible seal sleeve 81 can be drawn out along with the outer extension section 1.

[0071] Regarding the detachable structure of the above-mentioned disinfection tablet 83, in this embodiment, Figure 3 As shown, a plurality of disinfection grooves 821 are provided on the positioning stop 82, and a plurality of sustained-release gels 831 are also provided on the disinfection tablet 83 corresponding to the number and position of the disinfection grooves 821; an opening 832 is provided between two adjacent sustained-release gels 831 for the disinfection tablet 83 to be opened or combined, and the disinfection tablet 83 can be replaced while only loosening but not removing the locking ring 84.

[0072] When replacing the disinfection tablet 83, the opening 832 can be pulled open on the disinfection tablet 83 to form a C-shaped configuration, making it convenient for the disinfection tablet 83 to be taken out and inserted on the tube wall of the outer extension section 1.

[0073] Furthermore, regarding the positioning structure and function of the above-mentioned positioning stop 82, in this embodiment, Figure 3As shown, both end faces of the positioning retaining piece 82 are provided with water-based skin-friendly silica gel, and a plurality of arc-shaped positioning strips 822 are provided on the side facing the wound for increasing the friction force to maintain the positioning of the outer extension section 1.

[0074] During application, the function of the arc-shaped positioning strips 822 is that when the positioning retaining piece 82 is pressed on the skin outside the wound by increasing the friction force, the outer extension section 1 will not have problems of lateral or longitudinal displacement on the plane of the wound.

[0075] Regarding the anti-blocking structure of the above-mentioned anti-blocking drainage tube 4, this embodiment is as Figure 5 shown. One end of the anti-blocking drainage tube 4 away from the drainage channel 14 is provided with an anti-blocking section 43, and the anti-blocking section 43 surrounds the drainage inlet 42 of the anti-blocking drainage tube 4; the anti-blocking section 43 includes a first side flow hole 431, a second side flow hole 432, and a third side flow hole 433 provided on the circumferential side wall. The diameter of the first side flow hole 431 is larger than that of the second side flow hole 432, and the diameter of the second side flow hole 432 is larger than that of the third side flow hole 433; a plurality of first side flow holes 431 are arranged in a straight line along the axial direction of the anti-blocking section 43 and form a single row, and a plurality of rows of first side flow holes 431 are arranged along the circumferential direction of the anti-blocking section 43; the second side flow hole 432 and the third side flow hole 433 are combined into a single row and are arranged in a straight line and alternately along the axial direction of the anti-blocking section 43, and a plurality of rows of second side flow holes 432 and third side flow holes 433 are arranged along the circumferential direction of the anti-blocking section 43; a plurality of rows of second side flow holes 432 and third side flow holes 433 and a plurality of rows of first side flow holes 431 are arranged alternately along the circumferential direction of the anti-blocking section 43; and the centers of the first side flow holes 431 and the centers of the third side flow holes 433 are on the same circumferential plane.

[0076] During application, through the setting method of three side flow holes with different diameters and arranged alternately along the axial and circumferential directions, when the anti-blocking drainage tube 4 is connected to a negative pressure instrument for negative pressure suction, multiple-directional forces are generated through the pressure difference between the multiple side flow holes to dredge the side flow holes or prevent a large area of the side flow holes from being occupied by blockage substances.

[0077] Regarding the structure of the connection between the above-mentioned outer extension section 1 and the external device, the anti-fistula degradable and peritoneal drainage composite tube further includes a replaceable sealing interface part 9. This embodiment is as Figure 2 and Figure 3 shown. A sealing groove is provided on the peripheral wall at one end of the sealing interface part 9, and a sealing ring 91 is provided on the sealing groove. A plurality of connection ports 92 are provided at the other end of the sealing interface part 9, and the sizes and positions of the plurality of connection ports 92 are respectively arranged corresponding to a plurality of flow channels; the sealing interface part 9 is inserted into the operating end 11 of the outer extension section 1 through the end with the sealing ring 91 installed; at the end where the plurality of connection ports 92 are docked with the operating end 11 of the outer extension section 1, extension tubes 93 nested and docked with the plurality of flow channels are respectively provided.

[0078] When in application, anti-slip ridges 94 are provided between the two ends of the sealing connector 9, so that when connecting an external quality device and the extension section 1 through the sealing connector 9, it can be effectively held, avoiding large-amplitude touching of the anti-fistula section degradable and abdominal drainage composite tube due to slippery hands, and avoiding the problem that the anti-blocking drainage tube 4 and the extraintestinal anti-fistula tube 3 of the built-in inner extension section 2 are displaced, which affects the rehabilitation effect of the patient, thereby improving the rehabilitation treatment experience of the patient.

[0079] The second embodiment of the anti-fistula section degradable and abdominal drainage composite tube is as Figure 6 shown. The difference between this embodiment and the first embodiment is that the inside of the extension section 1 is a sheet-like support structure, and a plurality of circular plates 17 are arranged at equal intervals along the axial direction inside the tube to support the tube of the extension section 1; a plurality of flow channels pass through the plurality of circular plates 17 from the inside of the tube of the extension section 1 and penetrate through the two ends of the extension section 1.

[0080] When in application, due to the sheet-like support structure inside the tube of the extension section 1 and the flow channels passing through the plurality of circular plates 17 for support, a lightweight extension section 1 with a plurality of flow channels is formed.

[0081] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described.

Claims

1. A fistula-proof segment degradable abdominal drainage composite tube, characterized in that: The device comprises an extension section, wherein the extension section is provided with a thread sealing unit; the thread sealing unit is used to fix the extension section in the wound and seal the space between the extension section and the wound; The tube of the extended section is provided with a plurality of flow channels arranged along the axis, including a fistula-proof flow channel for discharging substances released from the outside of the intestinal anastomosis and a drainage flow channel for discharging substances produced in the abdominal cavity. and an inwardly extending section, the inwardly extending section comprising an intestinal anti-fistula tube and an anti-blocking drainage tube respectively cooperating with the anti-fistula flow channel and the drainage flow channel, the bending shapes and placement angles of the intestinal anti-fistula tube and the anti-blocking drainage tube being adjustable and fixed at will; One end of the intestinal fistula prevention tube is inserted into and fixed in the fistula prevention flow channel; the drainage outlet of the anti-blocking drainage tube is inserted into and fixed in the drainage flow channel, and the drainage inlet is used to extend into the abdominal cavity for drainage; and a degradable fistula-proof film tube, wherein a first branch interface is provided on the circumference between the two ends of the fistula-proof film tube, and the first branch interface is sleeved on the outer side of the other end of the intestinal fistula-proof tube; The two ends of the fistula-proof film tube are mutually connected, and the outer sides of the two ends are provided with binding rings, which are elastic and are used to bind the intestines on both sides of the intestinal anastomosis in cooperation with the internal fistula-proof tube built into the intestinal cavity of the intestinal anastomosis when the fistula-proof film tube is sleeved outside the intestinal anastomosis, so that the intestinal anastomosis cannot move forward and backward between the fistula-proof film tube and the internal fistula-proof tube; The diameter of the extraintestinal anti-fistula tube is larger than that of the anti-blockage drainage tube. The extraintestinal anti-fistula tube passes through the anti-fistula flow channel of the extended section, and extends from the outside of the wound into the flushing and negative pressure tube to flush the intestinal anastomosis or extend the endoscope into the wound to detect the healing condition of the intestinal anastomosis or inject liquid medicine. Support rings are provided on both sides adjacent to the first branch interface. The diameter of the support ring is larger than that of the tying ring. The support rings are used to provide space for flushing or drainage of the intestinal anastomosis, prevent inflammation or bleeding of the intestinal anastomosis due to excessive pressure, and promote the healing of the intestinal anastomosis.

2. The fistula-preventing and degradable composite tube for abdominal drainage according to claim 1, characterized in that: The tube of the extended section is also provided with an injection channel, and is arranged along the axis of the extended section together with the fistula prevention channel and the drainage channel; The inner extension section also includes an injection tube matched with the injection channel, and the bending shape and placement angle of the injection tube can be adjusted and fixed at will; one end of the injection tube is inserted into and fixed in the injection channel; A second branch interface is also provided on the circumference between the two ends of the fistula-proof film tube, and the second branch interface is sleeved on the outer side of the other end of the injection tube; The circumferential angle between the second branch interface and the first branch interface is greater than 90 degrees; when the fistula-proof film tube is installed, the first branch interface is located below the height of the human body, and the second branch interface is located above the height of the human body. The flushing liquid or medicine liquid entering the fistula-proof film tube from the injection tube flows from top to bottom to contact the intestinal anastomosis, and then enters the extraintestinal fistula-proof tube through gravity drive and is discharged from the body.

3. The fistula-preventing and degradable composite tube for abdominal drainage according to claim 2, characterized in that: A corrugated section is provided between the two ends of the liquid injection tube, and the corrugated section enables the bending shape and placement angle of the liquid injection tube to be arbitrarily adjusted and fixed.

4. The fistula-preventing segment degradable composite tube for abdominal drainage according to claim 1, characterized in that: A corrugated section is provided between both ends of the extraintestinal anti-fistula tube and the anti-blockage drainage tube, and the corrugated section enables the bending shape and placement angle of the extraintestinal anti-fistula tube and the anti-blockage drainage tube to be arbitrarily adjusted and fixed.

5. The fistula-preventing segment degradable and abdominal drainage composite tube according to claim 1, characterized in that: An anti-blocking section is provided at one end of the anti-blocking drainage tube away from the drainage channel, and the anti-blocking section surrounds the drainage inlet of the anti-blocking drainage tube; The anti-blocking section includes a first side flow hole, a second side flow hole and a third side flow hole arranged on the circumferential side wall, the diameter of the first side flow hole is larger than that of the second side flow hole, and the diameter of the second side flow hole is larger than that of the third side flow hole; The first side flow holes are arranged in a plurality of straight lines along the axial direction of the anti-blocking section and form a row, and the first side flow holes are arranged in a plurality of rows along the circumferential direction of the anti-blocking section; The second side flow holes and the third side flow holes are combined into one row and are alternately arranged along the axial straight line of the anti-blocking section. The second side flow holes and the third side flow holes are arranged in multiple rows along the circumferential direction of the anti-blocking section. Multiple rows of the second side flow holes and the third side flow holes, and multiple rows of the first side flow holes are alternately arranged along the circumference of the anti-blocking section; and the center of the first side flow hole and the center of the third side flow hole are on the same circumferential surface; through the arrangement of three side flow holes with different diameters and arranged alternately in the axial and circumferential directions, when the anti-blocking drainage tube is connected to the negative pressure instrument for negative pressure suction, the pressure difference between the multiple side flow holes generates power in multiple directions, thereby unblocking the side flow holes or preventing a large area of ​​the side flow holes from being occupied by blockages.

6. The fistula-preventing segment degradable composite tube for abdominal drainage according to claim 1, characterized in that: The thread sealing unit comprises an elastic flexible sealing sleeve, a positioning baffle, a detachable disinfection sheet and a locking ring; The two ends of the extended section are respectively an operating end and an inner probe end, the flexible sealing sleeve is connected and fixed between the two ends of the extended section, and the flexible sealing sleeve extends axially from the inner probe end while expanding circumferentially outward; a sealing thread is provided on the outer wall surface of the extended section adjacent to the operating end, and the locking ring is sleeved outside the extended section and connected to the sealing thread; The positioning baffle sealing sleeve is arranged on the outer wall surface between the flexible sealing sleeve and the locking ring; a through disinfection groove is arranged on the end surface of the positioning baffle, and the disinfection sheet is arranged between the positioning baffle and the locking ring; After the extension section is inserted into the wound, the positioning baffle is made to contact the outer skin of the wound, and the locking ring is rotated so that the locking ring applies pressure to the positioning baffle, and the flexible sealing sleeve is squeezed outward, and the elasticity and sealing performance of the flexible sealing sleeve are used to respectively achieve circumferential sealing of the inner side of the abdominal cavity of the wound and fix the extension section, and achieve circumferential sealing of the outer skin of the wound through the positioning baffle and the disinfection sheet; The disinfection sheet is provided with a slow-release gel for disinfection, and the slow-release gel penetrates into the skin contacted by the positioning baffle through the disinfection groove to achieve disinfection of the outer skin of the wound.

7. The fistula-preventing and degradable composite tube for abdominal drainage according to claim 6, characterized in that: The positioning baffle is provided with a plurality of disinfection grooves, and the disinfection sheet is also provided with a plurality of sustained-release gels corresponding to the number and position of the disinfection grooves; An opening is arranged between two adjacent sustained-release gels for the disinfection sheets to be opened or merged, and the disinfection sheets can be replaced by only loosening the locking ring but not removing it.

8. The fistula-preventing segment degradable composite tube for abdominal drainage according to claim 6, characterized in that: Both end surfaces of the positioning baffle are provided with water-based skin-friendly silica gel, wherein a plurality of arc-shaped positioning strips are provided on the side facing the wound, so as to increase the friction force and maintain the positioning of the extending section.

9. The fistula-preventing segment degradable composite tube for abdominal drainage according to claim 2, characterized in that: It also includes a replaceable sealing interface member, wherein a sealing groove is provided on a peripheral wall at one end of the sealing interface member, a sealing ring is provided on the sealing groove, and a plurality of connecting ports are provided on the other end of the sealing interface member, and the sizes and positions of the plurality of connecting ports are respectively provided corresponding to the plurality of flow channels; The sealing interface part is inserted into the operating end of the extending section through one end equipped with the sealing ring; the ends of the multiple connecting ports that are connected to the operating end of the extending section are respectively provided with extension pipes that are nested and connected with the multiple flow channels.

10. The fistula-preventing segment degradable composite tube for abdominal drainage according to claim 1, characterized in that: The tube of the extended section is a sheet-like support structure, in which a plurality of discs are arranged at equal intervals along the axial direction to support the tube of the extended section; a plurality of flow channels pass through the plurality of discs from the tube of the extended section and penetrate the two end tube openings of the extended section.

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