An irrigation and drainage apparatus for protecting tissue in a drainage area

Abstract

A flushing and drainage device for protecting the tissue in the drainage area includes a soft drainage tube with a first external end and a second internal end. Without removal of the tube, the second end remains stationary within the body. A drainage hole is provided on the side of the second end of the soft drainage tube. The device also includes a flushing tube, the first part of which is free from the soft drainage tube, and the second part which is located inside the soft drainage tube. A flushing hole is provided on the side of the second end of the flushing tube, and the relative position of the second part of the flushing tube to the soft drainage tube remains unchanged. By ensuring the soft drainage tube is positioned correctly, the internal segment remains stationary even when the external segment is touched. The device allows for safe placement of the drainage tube. By first determining the position of the second end of the drainage tube intraoperatively within the abdominal cavity, and then using clamps to grasp and pull the soft drainage tube and the flushing tube together out of the body, the possibility of drainage tube displacement can be reduced, and vital organs such as the pancreas, bile duct, and anastomoses of the small intestine can be protected.

Description

Technical Field

[0001] This invention belongs to the field of drainage device technology, and particularly relates to devices for drainage around anastomosis, specifically a flushing and drainage device that protects the tissue in the drainage area. Background Technology

[0002] Catheter drainage is a surgical procedure that involves inserting a catheter to drain abnormally accumulated fluids (such as pus, blood, bile, urine, etc.) or gases from the body. It is mainly used to treat or prevent infection, relieve pressure symptoms, or promote tissue healing.

[0003] Current drainage tubes are inserted externally into the body. To ensure safe insertion, they have a certain degree of rigidity. While they are generally suitable for drainage areas containing only fluid and without damage, they are not ideal for areas with sutures, anastomoses, or small clamping devices after surgery, such as the biliary anastomosis after liver transplantation. Existing rigid silicone drainage tubes require extreme caution during use. If the tube is touched externally, the internal end may shift, potentially touching the anastomosis, vulnerable organs, or clamping devices. This can lead to organ friction damage and bleeding, anastomotic leakage, and dislodgement of clamping devices, resulting in a series of postoperative complications. Furthermore, existing soft latex drainage tubes lack a corresponding flushing device, preventing simultaneous flushing.

[0004] Especially after open pancreaticobiliary anastomosis, when anastomotic leakage is required postoperatively, various problems can arise due to poor drainage. However, existing drainage tubes are prone to damaging the anastomosis during drainage. In addition, the exudate from the anastomotic leakage is more viscous and can easily block the drainage tube. Therefore, it is often necessary to flush and dilute the exudate before continuous drainage can be carried out. Existing double-lumen tubes with flushing function often use relatively rigid medical silicone tubes to meet the needs of external implantation, which cannot effectively protect the anastomotic leakage. Furthermore, if the flushing speed is not controlled, it can also easily impact the anastomosis. Summary of the Invention

[0005] To address the issue of existing drainage tubes being too rigid, easily causing them to wobble upon external contact and potentially interfering with sutures, anastomoses, and small clamping devices, a soft external drainage tube is used. This soft external tube prevents external contact from interfering with the position of the internal drainage tube. An irrigation tube is placed inside the soft external tube. However, due to its softness, the procedure involves inserting the internal end into the body first during invasive surgery, then creating a drainage incision, and finally using drainage forceps to pull the drainage tube out from the inside through the incision. This method ensures accurate insertion and positioning of the soft drainage tube, prevents external movement from interfering with its internal function, maximizes the protection of the drainage area, and the irrigation tube dilutes the fluid in the drainage area, accelerating drainage.

[0006] The specific technical solution is: a flushing and drainage device for protecting tissues in the drainage area, comprising,

[0007] A soft drainage tube is used for drainage. The first end is the external end, and the second end is the internal end. In use, if the first end is touched without being pulled out, the second end will not change position inside the body. A drainage hole is provided on the side of the second end of the soft drainage tube.

[0008] A flushing tube is used for flushing; the first part is free from the soft drainage outer tube, and the second part is set inside the soft drainage outer tube. Its first end is the external end; the second end is the internal end; a flushing hole is provided on the side of the second end of the flushing tube, and the end of the second end of the flushing tube is also inside the soft drainage outer tube.

[0009] The relative position of the second part of the flushing tube and the soft drainage tube does not change; and the first end of the soft drainage tube is connected to the connecting tube of the drainage bag in combination; the first end of the flushing tube is connected to the connecting tube of the flushing bag in combination.

[0010] Furthermore, based on the cross-sectional area comparison, the area corresponding to the outer diameter of the second part of the flushing tube is less than or equal to one-third of the area corresponding to the inner diameter of the soft drainage outer tube; this setting can ensure effective liquid drainage and also ensure the dilution of liquid in the drainage area.

[0011] Furthermore, to reduce the difficulty of traction between the flushing tube and the first end of the outer tube, when the first part of the flushing tube approaches the soft drainage outer tube along the longitudinal axis of the soft drainage outer tube, the distance difference between the first end of the flushing tube and the first end of the soft drainage outer tube is less than 10mm; a tight-fitting structure is provided on the outside of the second end of the flushing tube and the second end of the soft drainage outer tube to combine the two together.

[0012] Furthermore, the tight-fitting structure is a wrapping film that surrounds the flushing tube and the soft drainage tube. The wrapping film seals the openings of the flushing tube and the soft drainage tube, and also reduces the size of the flushing tube and the soft drainage tube. Alternatively, the tight-fitting structure is equipped with a sealing cap and two receiving grooves that are smaller than the size of the flushing tube and the soft drainage tube.

[0013] Furthermore, the soft drainage tube is made of soft silicone or latex, with soft latex being preferred. This type of tube is softer than a urinary catheter, ensuring that movement of the external portion does not cause localized movement and effectively protecting surgical sutures or anastomoses. The irrigation tube can be made of medical-grade silicone, which is elastic. This material is relatively rigid compared to softer drainage tubes, ensuring high strength even with a smaller size and preventing the risk of kinking or blockage due to bending.

[0014] Furthermore, 4-6 support protrusions are installed inside the soft drainage tube to avoid compression and adhesion of the drainage tube wall caused by tissue pressure. The length of the support protrusions is 10-15cm.

[0015] Furthermore, the second end of the soft drainage tube is provided with multiple rows of drainage holes around the side wall of the tube body in a 360° manner; or multiple sets of drainage holes are provided in a spiral manner.

[0016] Furthermore, to avoid the risk of the flushing tube closing due to bending of the soft drainage tube as it changes within the body, the second part of the flushing tube is confined to the center of the soft drainage tube, and multiple flushing holes are provided on the side of the flushing tube; the second end of the flushing tube is also sealed. The flushing tube is directly confined to the middle of the soft drainage tube by a support protrusion.

[0017] Furthermore, a flushing hole 1 is provided on the side of the flushing pipe, and a flushing hole 2 is provided on the soft drainage outer tube for each flushing hole 1. The corresponding flushing hole 1 and flushing hole 2 are connected by a connecting tube. In this way, the drainage area can be effectively flushed, avoiding the risk of blockage caused by the high viscosity of the liquid in the drainage area.

[0018] Alternatively, a flushing chamber can be provided at the second end of the soft drainage tube, with the flushing tube extending into the flushing chamber and sealing structures provided on both sides of the flushing chamber, so that the flushing chamber becomes an independent chamber that performs the flushing function; the side of the flushing tube is the first flushing hole, and the soft drainage tube is the second flushing hole; the flushing fluid enters the flushing chamber through the flushing tube and then through the first flushing hole, and then enters the drainage area through the second flushing hole.

[0019] Technical effect

[0020] The use of a soft external drainage tube minimizes the risk of impact on the internal segment when the external segment is touched externally. The combination of the external tube with the drainage and irrigation bags ensures that the entire tube is effectively pulled out of the body before assembly. The side-mounted drainage and irrigation holes prevent direct irrigation and aspiration of the anastomosis site, maximizing the protection of the sutured anastomosis area. Pre-determining the position of the second end of the drainage tube intraoperatively within the abdominal cavity, and then using clamps to pull the soft external drainage tube and irrigation tube out of the body, reduces the possibility of tube displacement and protects anastomoses of vital organs such as the pancreas, bile duct, and small intestine. This is especially important for the fragile biliary anastomosis after liver transplantation, ensuring safe placement of the drainage tube and avoiding the difficulties of external insertion. This allows for rapid and effective insertion of the irrigation and drainage tube while protecting the tissue.

[0021] The close-fitting structure allows the soft drainage tube and the flushing tube to be combined into a single unit during the installation process, facilitating easy pulling and tucking.

[0022] By limiting the second part of the flushing tube to the center of the soft drainage tube, the problem of the flushing tube being bent and blocked due to bending of the soft drainage tube can be avoided.

[0023] By specially setting up flushing hole one and flushing hole two, as well as the area connecting flushing hole one and flushing hole two, the flushing action can be carried out normally, and the drainage will not be affected by the setting of the flushing pipe in the middle of the soft drainage outer tube. Attached Figure Description

[0024] Figure 1 A schematic diagram of the overall structure of a drainage device equipped with a drainage bag and a flushing bag;

[0025] Figure 2 This is a schematic diagram of a drainage device with connecting tube one and connecting tube two.

[0026] Figure 3 A schematic diagram of the combined structure of the close-fitting structure, the soft drainage outer tube, and the flushing tube;

[0027] Figure 4 A schematic diagram of the drainage device in a transverse cross-section, showing the protruding support structure;

[0028] Figure 5 A partially enlarged schematic diagram of the second end of the drainage device that connects flushing hole one and flushing hole two via a connecting tube;

[0029] Figure 6 This is a partially enlarged longitudinal cross-sectional view of the second end of the drainage device that connects flushing hole one and flushing hole two via a connecting tube.

[0030] Figure 7 A partially enlarged schematic diagram of the second end of the drainage device that connects flushing hole one and flushing hole two through the flushing chamber;

[0031] Figure 8 A partially enlarged longitudinal sectional view of the second end of the drainage device that connects flushing hole one and flushing hole two through the flushing chamber;

[0032] Explanation of main figure symbols

[0033] 1. Soft drainage tube; 11. Drainage hole; 12. Support protrusion; 13. Dome structure; 2. Flushing tube; 21. First part; 22. Second part; 231. Flushing hole one; 232. Flushing hole two; 233. Connecting tube; 234. Flushing chamber; 235. Sealing membrane; 3. Adhesive structure; 4. Drainage bag; 41. Connecting tube one; 42. Connector one; 5. Flushing bag; 51. Connecting tube two; 52. Connector two; 6. Negative pressure suction structure. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] To keep the drawings concise, only the parts relevant to this application are shown schematically in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components with the same structure or function is shown schematically, or only one of them is labeled.

[0036] refer to Figure 1-3 A flushing and drainage device for protecting the tissue in the drainage area includes a soft drainage tube 1 for drainage. The soft drainage tube 1 has a first external end and a second internal end. In use, if the first end is touched without removal, the second end will not change position within the body. A drainage hole 11 is provided on the side of the second end of the soft drainage tube 1. The soft drainage tube 1 is made of soft silicone or latex, preferably soft latex. This tube is made of silicone or latex that is softer than a urinary catheter; when silicone is used, medium-soft silicone is selected. This ensures that movement of the external part does not cause movement of the internal tissue, effectively protecting the organs or anastomosis in the surgical area.

[0037] The flushing tube 2 is used for flushing; the first part 21 is free from the soft drainage tube 1, and the second part 22 is located inside the soft drainage tube 1, with its first end being the external end and its second end being the internal end; a flushing hole is provided on the side of the second end of the flushing tube 2, and the end of the second end of the flushing tube 2 is inside the soft drainage tube 1; the flushing tube 2 can be made of medical-grade silicone, and the flushing tube 2 is elastic. This material is harder than the soft drainage tube 1, which ensures that the smaller-sized flushing tube 2 has higher strength than the soft drainage tube 1 during use, and will not cause bending or blockage due to tube bending.

[0038] The relative position of the second part 22 of the flushing tube 2 and the soft drainage tube 1 does not change; and the first end of the soft drainage tube 1 is connected to the connecting tube of the drainage bag 4 in combination; the first end of the flushing tube 2 is connected to the connecting tube of the flushing bag 5 in combination.

[0039] In applications such as intra-abdominal gastrointestinal anastomosis surgery, the anastomosis is completed first. Then, under visual guidance, the second end of the irrigation and drainage tube is placed accurately in the drainage area through the anastomosis wound. During placement, the second end of the drainage tube should be as close as possible to the anastomosis site, ensuring it is perpendicular to the tube body in the corresponding area of ​​the anastomosis. The remaining portion of the drainage tube is then gradually guided to the abdominal wall via a specific path. An opening for the irrigation and drainage tube is then made on the abdominal wall from the outer side of the skin inwards. After opening, forceps are inserted from outside the body, simultaneously clamping the second ends of both the soft drainage tube 1 and the irrigation tube 2. Both tubes are then pulled out of the body. Simultaneously, the anastomosis wound is sutured, and the irrigation and drainage tubes are connected to the drainage bag 4 and irrigation bag 5. This completes the irrigation and drainage tube setup. Irrigation and drainage operations are then performed alternately or simultaneously. After use, simply pull the soft drainage tube 1 out of the body as a whole. For example, in the bile duct anastomosis surgery following a liver transplant, after the anastomosis is completed, the second segment of the irrigation and drainage tube is inserted into the accurate location of the drainage area through a minimally invasive or invasive incision. In the minimally invasive procedure, the second end of the drainage tube can be inserted using an endoscopic system. After insertion, the drainage tube is pulled out through the operating channel of the endoscopic system using instruments. Then, under the guidance of the endoscopic system, the remaining part of the drainage tube is gradually guided to the abdominal wall. The subsequent procedures are the same as those in the gastrointestinal anastomosis surgery and will not be described in detail here.

[0040] A more preferred embodiment is, referring to Figure 3The soft drainage tube 1 and the flushing tube 2 are made of the same material. Neither the soft drainage tube 1 nor the flushing tube 2 has a connector at its first end. A connector 42 is provided on the connecting tube 41 to be inserted into the soft drainage tube 1, and a corresponding connector 52 is provided on the connecting tube 51 to be connected to the flushing tube 2. This design ensures that the soft drainage tube 1 can be cut to the appropriate length as needed. With this design, connectors 42 and 52 can be arranged in a pagoda shape, which makes them less prone to separation after assembly and maintains structural stability.

[0041] Of course, connector 42 can also be set at the first end of the soft drainage tube 1, but it is necessary to ultimately control that the outer diameter of the first end of the soft drainage tube 1 is larger than the outer diameter of the main body of the soft drainage tube 1, but the distance of the outer diameter exceeding the outer diameter is less than or equal to 3mm; the outer diameter of the first end of the flushing tube 2 is larger than the outer diameter of the main body of the flushing tube 2, and the distance of the outer diameter exceeding the outer diameter is less than or equal to 2mm; this setting can avoid the risk of tissue damage caused by the tube being inserted into the body due to the large size difference, and can also ensure that it can be pulled out of the body.

[0042] The use of the soft drainage tube 1 minimizes the risk of impact on the internal segment when the external segment is touched. The combination of the external segment with the drainage bag 4 and the irrigation bag 5 ensures that the soft drainage tube 1 and the irrigation tube 2 are effectively pulled out of the body before assembly. The side-mounted drainage hole 11 and irrigation hole prevent direct irrigation and aspiration towards the anastomosis site, maximizing the protection of the sutured anastomosis area. Locating the second end of the irrigation drainage tube through the surgical incision ensures its placement. The use of clamps to hold and pull the soft drainage tube 1 and the irrigation tube 2 out of the body effectively protects the anastomosis site, avoiding difficulties in positioning the soft drainage tube during external insertion. This achieves rapid and effective insertion of the irrigation drainage tube while protecting the tissue.

[0043] A more preferred embodiment is, referring to Figure 4 To ensure that the placement of the irrigation tube 2 does not affect the drainage function of the soft drainage tube 1, this is addressed by controlling the dimensions of the soft drainage tube 1 and the irrigation tube 2. Specifically, through cross-sectional area comparison, the area corresponding to the outer diameter of the second part 22 of the irrigation tube 2 is less than or equal to one-third of the area corresponding to the inner diameter of the soft drainage tube 1; specifically, it can be one-quarter, one-fifth, or one-sixth. Different models can be set to suit the needs of different patients. This arrangement ensures effective fluid drainage while also preventing fluid dilution in the drainage area.

[0044] A more preferred embodiment involves reducing the difficulty of simultaneously clamping the first end of the irrigation tube 2 and the first end of the soft drainage tube 1 during traction. When the first part 21 of the irrigation tube 2 approaches the soft drainage tube 1 along its longitudinal axis, the distance difference between the first end of the irrigation tube 2 and the first end of the soft drainage tube 1 is less than 10 mm; specifically, the distance is less than 5 mm. A bonding structure 3 is provided on the outer side of the second end of the irrigation tube 2 and the second end of the soft drainage tube 1 to combine them. By combining the irrigation tube 2 and the second end of the soft drainage tube 1 together using the bonding structure 3, the difficulty of traction is reduced. Clamping only the bonding structure 3 makes it easier to pull the irrigation tube 2 and the second end of the soft drainage tube 1 out of the body. Furthermore, by tightly attaching the first end of the soft drainage tube 1 to the first end of the irrigation tube 2, and pulling it out of the body with a smaller size, the size of the drainage incision can be reduced, thereby reducing harm to the patient.

[0045] The specific implementation method of the fitting structure 3 is as follows, refer to Figure 3 The sealing structure 3 is a wrapping film that surrounds the irrigation tube 2 and the soft drainage tube 1. The wrapping film seals the openings of both the irrigation tube 2 and the soft drainage tube 1, and also reduces their size. This design greatly reduces the risk of tissue entering the tubes when they are pulled out of the body. Furthermore, the reduced size significantly reduces the difficulty of pulling the irrigation tube 2 and the soft drainage tube 1. In practical use, when the soft drainage tube 1 is pulled out of the body from the irrigation tube 2, the wrapping film is removed, and then the drainage bag 4 is connected to the soft drainage tube 1, and the irrigation bag 5 is connected to the irrigation tube 2.

[0046] Alternatively, another embodiment of the fitting structure 3 is that the fitting structure 3 is provided with a sealing cap and two receiving grooves that are smaller in size than the flushing tube 2 and the soft drainage tube 1. It can also be other structures that can seal the openings at the second end of the flushing tube 2 and the second end of the soft drainage tube 1 and fit the two together to form an integral structure.

[0047] A more preferred embodiment is, referring to Figure 4Because the soft drainage tube 1 is flexible, four support protrusions 12 are set inside the soft drainage tube 1 to avoid drainage obstruction caused by tissue pressure squeezing and sticking to the tube wall. The length of the support protrusions 12 is 10-15cm; the support protrusions 12 are set from the second end of the soft drainage tube 1 and extend for 10-15cm; this length setting ensures that the support protrusions 12 exist in the entire internal section of the soft drainage tube 1, ensuring that the gravity of the tissue will not block the soft drainage tube 1. This also means that the external section of the soft drainage tube 1 does not have support protrusions 12, which avoids the force of external movement being transmitted to the second end of the soft drainage tube 1 through the support protrusions 12, thus avoiding positional changes. The material of the support protrusions 12 is the same as that of the soft drainage tube 1, and it is a support structure that gradually deforms from the edge of the tube wall to the center of the tube wall. The drainage hole 11 and the flushing hole are both set in the area between the support protrusions 12; this setting can avoid related interference between structures and maintain the effectiveness and stability of various functions.

[0048] Specifically, the drainage holes 11 are arranged in multiple rows around the second end of the soft drainage tube 1 at a 360° angle to the side wall of the tube body; or multiple sets of drainage holes 11 are arranged in a spiral manner. A dome structure 13 that is not connected to the drainage area is set at the front end of the soft drainage tube. This arrangement can ensure sufficient drainage of the drainage area, avoid damage to the anastomosis site by the soft drainage tube 1 when the patient moves, and avoid the suction force that may be generated at the anastomosis site by directly aspirating the drainage fluid at the front end, which could affect the recovery of the anastomosis site.

[0049] refer to Figure 4 To avoid the risk of the flushing tube 2 closing due to the bending of the soft drainage tube 1 as it changes within the body, the second part 22 of the flushing tube 2 is confined to the central position of the soft drainage tube 1, and multiple flushing holes are provided on the side of the flushing tube 2; and the second end of the flushing tube 2 is closed. The flushing tube 2 is directly confined to the middle of the soft drainage tube 1 by the support protrusion 12.

[0050] When the flushing pipe 2 is positioned at the center of the flexible drainage outer pipe 1, the specific flushing hole configuration should refer to [reference needed]. Figure 5-6 A flushing hole 231 is provided on the side of the flushing pipe 2. A flushing hole 232 is provided on the flexible drainage outer pipe 1 for each flushing hole 231. A connecting pipe 233 connects the corresponding flushing hole 231 and flushing hole 232. This method effectively flushes the drainage area, avoiding the risk of blockage caused by high liquid viscosity in the drainage area. The flushing hole 232 and the drainage hole 11 can be arranged in the same array.

[0051] Or, refer to Figure 7-8A flushing chamber 234 is provided at the second end of the soft drainage outer tube 1. The flushing tube 2 extends into the flushing chamber 234, and sealing structures are provided on both sides of the flushing chamber 234, making the flushing chamber 234 an independent chamber for flushing. The flushing tube 2 has a flushing hole 1 231 on its side, and the soft drainage outer tube 1 has a flushing hole 232. The flushing fluid enters the flushing chamber 234 through the flushing tube 2, then through the flushing hole 1 231, and then through the flushing chamber 234 and the flushing hole 232 into the drainage area. The sealing structure consists of sealing membranes 235 on both sides of the flushing chamber 234. One membrane separates the space where the drainage hole 11 is located, and the other membrane separates the dome structure 13, ultimately making the flushing chamber 234 a relatively small chamber used only for flushing. This method allows the flushing fluid to enter the area closer to the anastomosis site, and then, guided by the drainage force of the drainage tube, it flows into the entire drainage area, effectively diluting the fluid in the drainage area. The fluid then enters the drainage tube through the drainage hole 11 and is finally led out into the drainage bag 4.

[0052] More specifically, when the irrigation drainage tube is suitable for pancreatic and bile duct drainage, the outer length of the soft drainage tube 1 is 30-40cm; 40cm is preferred, allowing for cutting as needed; this size meets the drainage requirements. The outer diameter of the soft drainage tube 1 is controlled within 9mm, and the diameter of the irrigation tube 2 is controlled within 1.8mm. The irrigation tube 2 is designed not to interfere with the drainage process. The irrigation tube 2 is connected to the irrigation bag 5, and a peristaltic pump provides irrigation power, controlling the irrigation flow rate at 20-30ml / min. This flow rate setting meets the irrigation requirements without causing excessive damage to the anastomosis.

[0053] In practice, the soft drainage tube 1 is a circular tube. The elastic force of the circular tube closing is greater than the tissue pressure. This setting can effectively prevent the closure of the outer tube.

[0054] When the combination of the irrigation tube 2 and the drainage tube is insufficient to dilute and effectively drain viscous fluid, a negative pressure suction structure 6 is installed on the drainage bag 4. When insufficient drainage volume is detected or blockage is observed during normal irrigation and drainage, the negative pressure suction structure 6 provides a stronger suction force to resolve the blockage. The negative pressure suction structure 6 can be a negative pressure balloon that provides negative pressure. A switch is installed on the negative pressure balloon; opening the switch and pressing the balloon indents it, then closing the switch provides negative pressure to the drainage tube. After the blockage is cleared, opening the switch allows the balloon to return to its original position, resuming drainage.

[0055] In practical use, the rinsing bag 5 is suspended at a high position, and the drainage bag 4 is placed at a low position, which can ensure effective rinsing and drainage.

[0056] The above description is merely a specific embodiment of this application. Under the guidance of the above teachings, those skilled in the art can make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of this application, and the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An irrigation and drainage apparatus for protecting tissue in a drainage area, for a scenario in which drainage is required after an invasive surgery and protection of tissue in a drainage area is required, characterized in that, It includes, A soft drainage tube is used for drainage. The first end is external, and the second end is internal. During use, any contact with the first end (excluding removal) will not cause any positional change in the second end within the body. The soft drainage tube is a circular tube, and the elastic force of the closed circular tube is greater than the tissue pressure. The entire soft drainage tube is made of a uniform material, either soft silicone or latex. Multiple rows of drainage holes are arranged around the second end of the tube at a 360° angle to the tube's sidewall. A dome structure, not connected to the drainage area, is located at the front end of the soft drainage tube. Four to six support protrusions are provided inside the soft drainage tube, starting from the second end. The length of each support protrusion ranges from 10 to 15 cm. No support protrusions are provided on the external portion to prevent external movement forces from being transmitted to the second end of the soft drainage tube and causing positional changes. The flushing tube is used for flushing. The first part is free from the soft drainage tube, and the second part is located inside the soft drainage tube, with its first end external and its second end internal. The entire flushing tube is made of a single, medical-grade silicone material, making it elastic. A flushing hole is provided on the side of the second end of the flushing tube, and the second end is closed. The area corresponding to the outer diameter of the second part of the flushing tube is less than or equal to one-third of the area corresponding to the inner diameter of the soft drainage tube. The flushing tube is directly constrained in the center of the soft drainage tube by a supporting protrusion, separating the flushing tube from the wall of the soft drainage tube. When the first part of the flushing tube approaches the soft drainage tube along its longitudinal axis, the distance difference between the first end of the flushing tube and the first end of the soft drainage tube is less than 10mm. The relative position of the second part of the flushing tube and the soft drainage tube remains unchanged. A binding structure is installed on the outside of the second end of the flushing tube and the second end of the soft drainage tube to combine the two together. The binding structure is a wrapping film that covers the flushing tube and the soft drainage tube. The wrapping film seals the openings of the flushing tube and the soft drainage tube and reduces their size. When the soft drainage tube and the flushing tube are pulled out of the body, the wrapping film is removed. Alternatively, the binding structure is provided with a sealing cap and two receiving grooves that are smaller than the size of the flushing tube and the soft drainage tube.

2. The flushing and drainage device according to claim 1, characterized in that, The first end of the soft drainage tube is combined and connected to the connecting tube of the drainage bag. The connecting tube is provided with a connector for inserting the soft drainage tube. The first end of the flushing tube is combined and connected to the connecting tube of the flushing bag. The connecting tube is provided with a connector for connecting to the flushing tube.

3. The flushing and drainage device according to claim 1, characterized in that, A flushing hole 1 is set on the side of the flushing tube, and a flushing hole 2 is set on the soft drainage outer tube for each flushing hole 1. The corresponding flushing hole 1 and flushing hole 2 are connected by a connecting tube.

4. The flushing and drainage device according to claim 1, characterized in that, A flushing chamber is provided at the second end of the soft drainage tube. The flushing tube extends into the flushing chamber, and a sealing structure is provided on both sides of the flushing chamber, so that the flushing chamber becomes a chamber that can independently perform the flushing function. A flushing hole one is provided on the side of the flushing pipe, and a flushing hole two is provided on the soft drainage outer pipe; the flushing fluid enters the flushing chamber through the flushing pipe and then through the flushing hole one, and then enters the drainage area through the flushing hole two after passing through the flushing chamber.

5. The flushing and drainage device according to any one of claims 1-4, characterized in that, A negative pressure suction structure is installed on the drainage bag.

6. The flushing and drainage device according to any one of claims 1-4, characterized in that, The outer diameter of the first end of the soft drainage tube is equal to or exceeds the outer diameter of the main body of the soft drainage tube by 3 mm or less; the outer diameter of the first end of the flushing tube is equal to or exceeds the outer diameter of the main body of the soft drainage tube by 2 mm or less.

7. The flushing and drainage device according to any one of claims 1-4, characterized in that, The length of the soft drainage tube suitable for pancreatic bile duct drainage is 30-40 cm.

8. The flushing and drainage device according to claim 7, characterized in that, The diameter of the soft drainage tube should not exceed 9mm; the outer diameter of the flushing tube should not exceed 3mm.

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