Internal and external bile duct fixed drainage tube

Abstract

The present invention relates to the technical field of medical devices, specifically to an inner and outer layer bile duct fixed drainage tube, which is made of latex material and has a T-shaped portion placed in the common bile duct for support and guidance, and a drainage portion that is led out of the body through the abdominal wall. The drainage bag for collecting bile is connected to the outside through the drainage portion. The T-shaped portion includes a support portion formed by cutting the end of the drainage portion along the cross-sectional diameter, and the support portion is arranged along the common bile duct for support; it also includes an operating rod with axial compression resistance and a restraining member. When the drainage tube is removed, the operating rod enters the drainage portion from one end of the drainage portion and forms a support end portion at the connection port between the drainage portion and the support portion. The restraining member drives the support portion to converge toward the support end portion and then exits the body with the drainage portion. The present invention improves the existing T-shaped drainage tube with a low-cost simple structure, and can reduce the volume when removing the tube for easy removal.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to an inner and outer layer bile duct fixed drainage tube. Background Art

[0002] The biliary drainage T-tube is a special tubular instrument used for common bile duct drainage during hepatobiliary surgery. It is named for its "T"-shaped appearance. It consists of a short arm perpendicular to the long arm and a long arm that is led out of the body through the abdominal wall. The short arm is placed in the common bile duct, and the long arm passes through the abdominal wall to connect to the external drainage device. Its main use is that the placement of a T-tube after common bile duct incision can effectively drain bile, reduce the pressure in the bile duct, and prevent bile from leaking into the abdominal cavity and causing infection or peritonitis. At the same time, the short arm supports the common bile duct incision, avoids postoperative scar hyperplasia leading to bile duct stenosis, and provides a stable environment for bile duct healing. In addition, the T-tube can also serve as a channel for postoperative cholangiography, making it easier for doctors to observe whether there are residual stones or stenosis in the bile duct. If necessary, fiber choledoscopic stone removal and other operations can be performed through the T-tube sinus.

[0003] In terms of specific operations, during the operation, after the doctor opens the common bile duct to remove stones or relieve obstruction, he gently inserts the short arm of the T-tube into the common bile duct, ensuring that the short arm is fully extended and located in the bile duct. The common bile duct incision is then sutured, and the long arm is led out from the puncture hole in the abdominal wall next to the incision. It is fixed to the abdominal wall skin to prevent it from falling out, and an external sterile drainage bag is connected to collect bile. After the operation, the amount, color and properties of the drained bile need to be closely observed, the drainage bag should be replaced regularly and the drainage tube should be kept unobstructed. A clamping test can be performed 1-2 weeks after the operation. If the patient has no abdominal pain, fever, jaundice and other discomforts, and T-tube cholangiography confirms that the bile duct is unobstructed, there is no residual lesion and the sinus tract is well formed (usually 2-4 weeks after the operation, the sinus tract is wrapped by fibrous tissue to prevent bile leakage), the T-tube can be removed. After the tube is removed, the sinus tract will close on its own without the need for sutures. The entire process achieves the recovery and reconstruction of bile duct function through precise tube support and drainage.

[0004] The existing T-tube structure is usually made by cutting off a portion of the existing rubber T-tube and then inserting it into the bile duct. Although this material is made of soft rubber, due to its T-tube structure, its expansion and extension effect is good, which makes it difficult to remove the tube during removal. This often causes the bile duct incision to be pulled and bleed, or even form a large opening that cannot heal in time, and the operation remains unchanged. The existing improvement method is to cut as much length as possible to form a shorter T-shaped part, but this method will result in the T-shaped part placed in the bile duct having poor support effect and is prone to deformation and twisting. Summary of the Invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a bile duct fixed drainage tube that is optimized and improved based on the existing rubber T-tube. Through a detachable operating rod structure and a restraining piece, the T-shaped part can be directly operated from the outside to be contracted and easily pulled out when the tube is removed.

[0006] The technical solution adopted in the present invention is:

[0007] In a first aspect, the present invention provides an inner and outer layer bile duct fixed drainage tube, which is made of latex material and has a T-shaped portion placed in the common bile duct for support and guidance, and a drainage portion that is led out of the body through the abdominal wall, and is connected to an external drainage bag for collecting bile through the drainage portion. The T-shaped portion includes a support portion formed by cutting the end of the drainage portion along the cross-sectional diameter, and the support portion is arranged along the common bile duct for support;

[0008] It also includes an operating rod with axial compression resistance and a restraining part. When the drainage tube is taken out, the operating rod enters the drainage part from one end of the drainage part and forms a supporting end part at the connecting port between the drainage part and the supporting part. The restraining part drives the supporting part to converge toward the supporting end part and then exits the body with the drainage part.

[0009] In combination with the first aspect, the present invention provides a first implementation manner of the first aspect, wherein an outward turning piece for providing an outward turning force to the support portion is provided at the connection between the support portion and the drainage portion.

[0010] In combination with the first embodiment of the first aspect, the present invention provides a second embodiment of the first aspect, wherein the external flip-up member is a strip of elastic material embedded in the drainage portion and extending along the length direction of the drainage portion.

[0011] In combination with the first aspect, the present invention provides a third embodiment of the first aspect, wherein the restraining member is a drawstring having one end connected to the end of the support portion, and the other end of the drawstring extends outward along the drainage portion and protrudes from the outer end of the drainage portion to form an operating end;

[0012] The operating rod is a pipe fitting. When the drainage line is taken out, the operating end of the pull rope passes through the operating rod, and when the support end is formed, the pull rope is pulled externally to make the support part converge toward the support end.

[0013] In combination with the third embodiment of the first aspect, the present invention provides a fourth embodiment of the first aspect, wherein the support portion has a plurality of easily foldable portions, and when the pull rope is pulled, the support portion folds and contracts toward the support end portion.

[0014] In combination with the third embodiment of the first aspect, the present invention provides a fifth embodiment of the first aspect, wherein the external port of the drainage portion has an enlarged cavity for accommodating the pull rope operating end.

[0015] In combination with the first aspect, the present invention provides a sixth embodiment of the first aspect, wherein the restraining member is a collar sleeved at the connection between the drainage portion and the support portion, the collar comprising an inner ring located within the drainage portion and an outer ring located outside the drainage portion, the connection between the outer ring and the inner ring being located at the connection gap between the two support portions and the drainage portion, the connection portion separating the annular space formed between the inner ring and the outer ring to form two waist-shaped holes, and the support portion passing through the waist-shaped holes;

[0016] When the drainage tube is taken out, the operating rod presses against the inner ring from the inner side of the drainage part and pulls the drainage part outwards so that the supporting part is gathered toward the ring and is ejected from the body along with the drainage part.

[0017] In combination with the sixth embodiment of the first aspect, the present invention provides a seventh embodiment of the first aspect, wherein the end of the support portion has an enlarged end that limits the ring from detaching from the drainage tube.

[0018] In combination with the sixth embodiment of the first aspect, the present invention provides an eighth embodiment of the first aspect, wherein the drainage part has a portion outside the body that is longer than the operating rod, and the operating rod remains in the drainage part outside the body when the drainage tube is connected to the drainage bag.

[0019] In combination with the eighth embodiment of the first aspect, the present invention provides a ninth embodiment of the first aspect, wherein the operating rod has a reduced diameter portion with a gradually decreasing outer diameter, and when removing the drainage pipeline, the drainage portion nested in the reduced diameter portion is displaced relative to the operating rod to remove the drainage portion.

[0020] The beneficial effects of the present invention are:

[0021] (1) The present invention forms a support structure by cutting directly on a complete drainage tube, which has a simple structure and low cost. When the drainage tube needs to be removed, the two support parts can be easily folded and merged. Compared with the closing resistance caused by cutting the existing T-shaped tube, the pressure caused by the removal of the bile duct incision is smaller;

[0022] (2) The present invention provides an axially incompressible strip structure, which can be used to close the supporting parts on both sides toward the middle during removal, thereby reducing the cross-sectional size of the tube inside the bile duct during removal, facilitating the rapid removal of the drainage tube and reducing the tearing effect on the bile duct opening. The operation is simple and does not change the soft nature of the drainage tube itself.

[0023] (3) The present invention has a pull rope structure, which is low in cost and convenient for folding the support part with a hard operating rod. At the same time, the support part with a folding structure can be folded quickly.

[0024] (4) The present invention provides a ring structure, which cooperates with an operating rod that penetrates from the inside and presses against the inner ring. By pulling the drainage part to slide relative to the operating rod, the support part is continuously retracted during the pulling-out process, providing a better retraction effect and less impact on the bile duct opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a plan view of a first type of fixed drainage pipeline in an embodiment of the present invention;

[0026] Figure 2 This is an axonometric diagram of a first type of fixed drainage pipeline according to an embodiment of the present invention;

[0027] Figure 3 This invention Figure 2 A local enlarged schematic diagram;

[0028] Figure 4 1 is a plan view of a second type of fixed drainage pipeline according to an embodiment of the present invention;

[0029] Figure 5 This invention Figure 4 A local enlarged schematic diagram of B in FIG.

[0030] Figure 6 is an axonometric view of a second type of fixed drainage pipeline in an embodiment of the present invention;

[0031] Figure 7 This is a plan view of a first state of a third fixed drainage pipeline in an embodiment of the present invention;

[0032] Figure 8 This is a plan view of the second state of the third fixed drainage pipeline in an embodiment of the present invention;

[0033] Figure 9 This is an axonometric diagram of a first state of a third fixed drainage pipeline in an embodiment of the present invention;

[0034] Figure 10 This invention Figure 9 A local enlarged schematic diagram of C in FIG.

[0035] Figure 11 This is an axonometric diagram of the second state of the third fixed drainage pipeline in an embodiment of the present invention;

[0036] Figure 12 It is a schematic structural diagram of a partially cutaway portion of a third type of fixed drainage pipeline in an embodiment of the present invention.

[0037] In the figure: 1- drainage part, 2- support part, 3- pull rope, 4- operating rod, 5- ring, 501- inner ring, 502- outer ring, 503- waist-shaped hole. 6- inner wall casing. DETAILED DESCRIPTION

[0038] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0042] In the description of this application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on this application. In addition, if the terms "first", "second", etc. appear in the description of this application, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0043] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not necessarily imply that a component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical" and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0044] It should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. A person of ordinary skill in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0045] Example 1:

[0046] The present embodiment discloses an inner and outer layer bile duct fixed drainage conduit, which is used to support drainage in the bile duct and connect an external drainage bag to collect bile and stones. The drainage conduit in this embodiment is mainly a T-shaped tube structure, having a T-shaped portion and a drainage portion 1. The T-shaped portion includes two support portions 2 that are flipped outward and unfolded. When in use, an incision is first made in the bile duct, and the two support portions 2 are manually closed and then inserted into the bile duct in the closed state. The support portion 2 is unfolded along the length direction inside the common bile duct to form a support, and then the opening is sutured to wrap the part where the drainage portion 1 passes through. The end of the drainage portion 1 that passes through the body is connected to a drainage bag or other structure to complete the drainage operation process.

[0047] In view of the fact that the existing method is to directly use a T-shaped tube for cutting, the cutting method includes shortening the ends of the T-shaped portion, or horizontally cutting along the center line of the T-shaped portion to form a semi-cylindrical structure. In this embodiment, the T-shaped portion is formed by cutting the end of a complete rubber drainage portion 1 along any diameter of the cross section to form two symmetrical support portions 2.

[0048] The T-shaped portion in this embodiment can be configured in two ways. One is to directly cut the support portion 2 according to standard specifications at the factory, and then fold it together during packaging to maintain a single tube structure for transportation. Before surgery, the user removes the drainage portion 1 from the packaging and separates the ends to form two support portions 2 for use. The other is to ship as a complete single tube structure. A cutting line is marked on one end of the drainage portion 1. After removing the drainage tube from the packaging, the user can cut the support portion 2 according to their needs along the cutting line to better suit the individual patient's needs during surgery.

[0049] Since the drainage line itself is a pipe structure with two ports, after one end port is cut to form two semi-cylindrical support parts 2, its port plane is transferred to the connection between the two support parts 2 and the drainage part 1. Since the two support parts 2 are folded outward during use, the side port is not blocked, and the bile or stones in the bile duct can flow out of the drainage part 1 through this port.

[0050] It should be noted that the above-mentioned modification of the drainage tube in this embodiment is to facilitate the smooth removal of the drainage tube with the least possible impact on the wound after the drainage is completed 2-4 days after the operation. This is because the drainage tube does not require a second operation to be removed after the operation. It can be directly pulled out from the body in the hospital. The smaller opening where the bile duct originally flows out will heal automatically, and you only need to pay attention to whether a large amount of bile flows out.

[0051] That is, in addition to transforming the T-shaped portion at the end of the drainage portion 1 into a support portion 2 formed by cutting and separating a single pipe, other structures for convenient manual removal of the pipe are also provided, including an independently used operating rod 4 and a restraining member.

[0052] The operating rod 4 is a strip-shaped structure sized to fit within the drainage section 1, allowing it to be inserted from one end. The operating rod 4 is made of either a flexible or rigid material, both of which exhibit axial resistance to compression. This axial resistance refers to the fact that the operating rod 4 itself resembles the structure of an endoscope; applying an axial force on one end of the operating rod 4 will inevitably induce axial movement at the other end. However, in general use, the operating rod 4 is made of a material with a small bending range to ensure stability.

[0053] The operating rod 4 and the drainage section 1 in this embodiment are a complete set of equipment, that is, an operating rod 4 is included in the same packaging when shipped from the factory. In conventional technology, the drainage section 1 is a disposable device, while the operating rod 4 can be a reusable device made of metal or other materials that are easy to sterilize at high temperatures and can be used repeatedly. During the biliary drainage operation, after the drainage tube is buried, the operating rod 4 is placed outside the body as an independent structure and can be placed independently. Only when the tube is removed and the drainage bag is removed, the operating rod 4 is inserted into the drainage section 1 from the port and slowly extended inward until the end of the operating rod 4 reaches the connection between the drainage section 1 and the support section 2, that is, the inner open end surface of the drainage section 1.

[0054] In this embodiment, to facilitate inspection of the proper insertion of the operating rod 4, a marking is placed on the operating rod 4. This marking is typically a scale indicating the insertion length of the operating rod 4 relative to the end of the drainage tube. Two methods exist for determining this. One is to calibrate the standard insertion length range before shipment. Specifically, a length range is marked on the corresponding position of the operating rod 4, based on the length of the drainage tube itself. When this length range is marked at the end of the drainage section 1, it indicates that the appropriate insertion depth has been reached, and a support end of the operating rod 4 of the appropriate length has been formed at the junction of the drainage section 1 and the support section 2. The other method is to leave the marking unmarked before shipment. Instead, the user removes the device before surgery, first confirms the position of the support section 2, inserts the operating rod 4 externally, adjusts the position, and then manually marks the corresponding position on the operating rod 4. This marking can be done with a medical-standard marker pen or by creating a groove on the surface of the operating rod 4. This marking serves as a guide for determining the insertion depth when removing the drainage tube.

[0055] Furthermore, the restraining member is a limit member provided on the drainage portion 1. The limit member can pull out the drainage tube through external operation after the operating rod 4 is inserted into place. Before or while pulling out, the support portions 2 on both sides can be gathered toward the support end, thereby reducing the volume of the pull-out and avoiding a significant impact on the wound. Since the drainage portion 1 and the support portion 2 are both made of soft rubber materials, this material itself cannot form a good directional movement internally by relying on external operation. Therefore, it is necessary to provide an operating rod 4 as a hard structure to form a support end at its end to provide a supporting force as a support point of the restraining member. The restraining member in this embodiment will have an operating end that acts directly or indirectly outside the body, and the two support portions 2 are operated by the operating end outside the body to retract relative to the support end.

[0056] Furthermore, preferred limitations are made based on the above-mentioned restraining members, and corresponding operating method instructions are provided for each restraining member.

[0057] As an embodiment, referring to Figure 1-3 ,The figure shows a way to implement the drainage pipeline.

[0058] The drainage conduit comprises an integrated drainage portion 1 and a support portion 2, wherein the support portion 2 is a symmetrical semi-cylindrical structure formed by cutting a certain length along the midline of one side port of the drainage portion 1. An outward-folding elastic member is embedded at the connection between the support portion 2 and the drainage portion 1 to provide an outward-folding force. In this embodiment, the elastic member is a rubber band, which is elastically stretched and adhered to the outer surface of the support portion 2 to form a contraction force. After the port of the drainage portion 1 on this side is cut, the two support portions 2 will fold outward. By setting an appropriate length, the folding angle between the support portion 2 and the drainage portion 1 is approximately 90 degrees when no force is applied.

[0059] It also includes an operating rod 4, which is a pipe structure made of medical polymer materials. Its cross-sectional size is smaller than the internal cross-sectional size of the drainage part 1 and can be smoothly inserted into the drainage tube.

[0060] A pull rope 3 serving as a restraining member is provided in the drainage portion 1, and a pull rope 3 is provided corresponding to each support portion 2. The length of the pull rope 3 is greater than the length of the drainage portion 1. One end of the pull rope 3 is fixed to the end of the support portion 2, and the other end extends from the inside of the drainage portion 1 to the other end of the drainage portion 1 and passes through, and a certain length is reserved at the external end of the drainage portion 1 as an operating part.

[0061] In practice, the external port of the drainage section 1 is provided with an enlarged cavity for accommodating two excessively long drawstrings 3. This allows the drainage section 1 to be connected to an external drainage bag without affecting bile drainage. To remove the cannula, the drainage bag is first removed, and then the drawstrings 3 are pulled out of the enlarged cavity to a desired length.

[0062] Then, place the operating rod 4 at the outer port of the drainage section 1, insert the pull cord 3 extending outward from the port through the insertion port of the operating rod 4 and pass it out from the other port of the operating rod 4, and then insert the operating rod 4 into the drainage section 1. After the operating rod 4 has been inserted into the drainage section 1 to a corresponding length, it can be confirmed from the outside of the body that the support end has been inserted into the bile duct by the marking. Then, pull the two pull cords 3 outward to make the two soft support parts 2 move closer to the support end. At this time, you can try to pull the operating rod 4 and the drainage section 1 outward according to the situation. If the resistance is large, keep the operating rod 4 and the drainage section 1 in the same position and continue to pull the pull cord 3 until the operating rod 4 and the drainage section 1 can be pulled out relatively easily, completing the extubation process.

[0063] Furthermore, in order to ensure a better guiding and restraining effect, an inner wall sleeve 6 is provided on the inner wall of the support part 2, and the two ends of the inner wall sleeve 6 are arranged correspondingly to the two ends of the support part 2. One end of the pull rope 3 passes through the inner wall sleeve 6 and is fixedly connected to the end of the support part 2 after passing through the inner wall sleeve 6 from the other end. In this arrangement, when the support part 2 is kept Figure 2In the state, the two pull ropes 3 are pulled based on the support end of the fixed operating rod 4. Since one end of the pull rope 3 is fixed to the end of the support part 2, the force will be applied to the end of the support part 2. However, when the end of the support part 2 is forced to move inward, if the inner wall sleeve 6 is not provided, the support part 2 may shrink inward in the form of a middle bend. Due to the restriction between the inner wall sleeve 6 and the pull rope 3, the end of the support part 2 will be forced to move inward in the form of a bend at the connection between the support part 2 and the drainage part 1. This method can ensure that after pulling the pull rope 3, the support part 2 can move closer to the support end in the form of a bottom bend. At this time, the pull rope 3 and the drainage part 1 are pulled simultaneously from the outside, and the position of the operating rod 4 is kept unchanged, so that the support part 2 can gradually shrink toward the center in the bile duct and be pulled out as the drainage part 1 moves outward. Not only can it have a smaller impact on the opening of the bile duct, but it will also not affect the state of the bile duct itself when it gathers in the bile duct.

[0064] As an embodiment, referring to Figure 4-Figure 6 Based on the pull rope 3 scheme of the previous embodiment, the structure of the support part 2 is further optimized and improved.

[0065] The support part 2 shown in the figure is a foldable structure, which is made of elastic soft material and has several foldable parts along its length, that is, folds where the thickness becomes thinner. However, when the support part 2 is not subjected to the pulling force, it is in an elastically expanded state. When the pull rope 3 is pulled inward, the support part 2 is in an elastically expanded state. Figure 6 In the state, the support part 2 on one side contracts inward in a folded manner. Since the force of the pull rope 3 is directed toward the outside of the drainage part 1, it will eventually contract to form a tubular wall structure, thereby achieving the optimal pull-out volume.

[0066] As an embodiment, referring to Figure 7-12 , the figure shows a third solution, that is, a restraining member structure different from the pull rope 3.

[0067] Reference Figure 10 The restraining member in this embodiment is a ring 5, which includes an inner ring 501 and an outer ring 502. The inner ring 501 and the outer ring 502 are connected by two connecting parts. The two connecting parts separate the annular gap between the inner ring 501 and the outer ring 502 into two waist-shaped holes 503.

[0068] When setting, the collar 5 is simultaneously sleeved inward from the ends of the two support parts 2, so that the two support parts 2 pass through the two waist-shaped holes 503 respectively, and then the collar 5 is continuously slid inward until it contacts the port of the drainage part 1 and is fixed. During intubation, since the two support parts 2 will expand outward to maintain the T-shaped state in the figure, the collar 5 will always remain fixed near the connection between the drainage part 1 and the support part 2. The inner ring 501 of the collar 5 will be placed inside the port of the drainage part 1. When it is necessary to remove the collar 5, the end of the inserted operating rod 4 will abut against the inner ring 501 from the inside of the drainage part 1, and after abutting, it can provide support for the entire collar 5. At this time, the operating rod 4 is kept fixed, and then the drainage part 1 is pulled outward. Since the length of the operating rod 4 is longer than the drainage part 1, and the length of the extended length is greater than the length of the support part 2, it is ensured that when the support part 2 completely falls out of the bile duct, the operating rod 4 always has a part that falls out of the drainage part 1.

[0069] Since the operating rod 4 is kept fixed, when the drainage part 1 moves outward relative to the operating rod 4, the support parts 2 on both sides will be guided by the collar 5 to converge toward the middle. Figure 11 and Figure 12 The state shown in the figure is the restrained state formed by pulling outward a certain length of the drainage portion 1. It can be seen that the restrained position will always be at the bile duct opening. This method will cause the support portion 2 to gradually approach the support end of the operating rod 4 while remaining flipped, and bend and restrain at the support end, maintaining the smallest cross-sectional area when falling out of the bile duct opening, thereby having a low impact and not excessively tearing the bile duct opening.

[0070] It should be noted that the inner ring 501 itself is made of a medically degradable material. Even if it falls into the bile duct during extubation, it will be expelled from the body or decomposed and expelled within the body. However, in another embodiment, the end of the support portion 2 is provided with an enlarged end. The enlarged end ensures that when the end of the support portion 2 contacts the ring 5, the ring 5 can be completely pulled out, preventing it from being retained in the body.

[0071] It should also be noted that the solution provided in this embodiment does not limit specific materials and dimensions. For those skilled in the art, the above solution will meet relevant medical standards and requirements when implemented. Furthermore, more complex telescopic structure alternatives may exist in the prior art, but the present application aims to achieve a low-cost, operable effect. This optimization is based on existing material structures, resulting in low material costs and convenient and reliable operation.

[0072] The present invention is not limited to the above optional embodiments. Anyone can derive various other forms of products based on the teachings of the present invention. The above specific embodiments should not be construed as limiting the scope of protection of the present invention. The scope of protection of the present invention shall be based on the scope defined in the claims, and the description can be used to interpret the claims.

Claims

1. An inner and outer layer bile duct fixed drainage conduit, made of latex material, having a T-shaped portion placed in the common bile duct for support and guidance and a drainage portion (1) leading out of the body through the abdominal wall, connected to an external drainage bag for collecting bile through the drainage portion (1), characterized in that: The T-shaped portion comprises a support portion (2) formed by cutting the end of the drainage portion (1) along the cross-sectional diameter, and the support portion (2) is arranged along the common bile duct for support; It also includes an operating rod (4) with axial compression resistance and a restraining member. After the drainage part (1) is buried, the operating rod (4) is placed outside the body as an independent structure. When the drainage line is removed, the operating rod (4) enters the drainage part (1) from one end thereof and forms a supporting end portion at the connection port between the drainage part (1) and the supporting part (2). The restraining member drives the supporting part (2) to converge toward the supporting end portion and then falls out of the body along with the drainage part (1). The restraining member is a drawstring (3) with one end connected to the end of the support portion (2), and the other end of the drawstring (3) extends outward along the drainage portion (1) and extends from the outer end of the drainage portion (1) to form an operating end; The operating rod (4) is a pipe fitting, and when the drainage pipe is removed, the operating end of the pull rope (3) passes through the operating rod (4), and when the support end is formed, the pull rope (3) is pulled externally to make the support part (2) converge toward the support end; Or the restraining member is a ring (5) sleeved at the connection between the drainage part (1) and the support part (2), the ring (5) comprising an inner ring (501) located inside the drainage part (1) and an outer ring (502) located outside the drainage part (1), the connection between the outer ring (502) and the inner ring (501) being located at the connection gap between the two support parts (2) and the drainage part (1), and two waist-shaped holes (503) are formed by the connection part at the annular space formed between the inner ring (501) and the outer ring (502), and the support part (2) passes through the waist-shaped holes (503); when removing the drainage tube, the operating rod (4) presses against the inner ring (501) from the inside of the drainage part (1) and pulls the drainage part (1) outward so that the support part (2) is gathered toward the ring (5) and falls out of the body along with the drainage part (1).

2. The inner and outer layer bile duct fixed drainage tube according to claim 1, characterized in that: An outward turning piece for providing an outward turning force to the support portion (2) is provided at the connection between the support portion (2) and the drainage portion (1).

3. The inner and outer layer bile duct fixed drainage tube according to claim 2, characterized in that: The external turning piece is a strip-shaped object made of elastic material and embedded in the drainage portion (1) and extending along the length direction of the drainage portion (1).

4. The inner and outer layer bile duct fixed drainage tube according to claim 1, characterized in that: The support portion (2) is provided with a plurality of easily foldable portions, and when the pull rope (3) is pulled, the support portion (2) is folded and gathered toward the support end portion.

5. The inner and outer layer bile duct fixed drainage tube according to claim 1, characterized in that: The drainage portion (1) has an enlarged cavity at the external port thereof for accommodating the operating end of the pull cord (3).

6. The inner and outer layer bile duct fixed drainage tube according to claim 1, characterized in that: The end of the support portion (2) has an enlarged end for limiting the collar (5) from separating from the drainage pipeline.

7. The inner and outer layer bile duct fixed drainage tube according to claim 1, characterized in that: The drainage part (1) has a portion outside the body that is longer than the operating rod (4), and the operating rod (4) is retained in the drainage part (1) outside the body when the drainage line is connected to the drainage bag.

8. The inner and outer layer bile duct fixed drainage tube according to claim 7, characterized in that: The operating rod (4) has a reduced diameter portion with a gradually decreasing outer diameter. When removing the drainage pipeline, the drainage portion (1) nested in the reduced diameter portion is displaced relative to the operating rod (4) to remove the drainage portion (1).

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