Inner-layer and outer-layer biliary tract fixing drainage pipeline

Abstract

The invention relates to the technical field of medical instruments, in particular to an inner and outer layer biliary tract fixing drainage pipeline which is made of latex materials and provided with a T-shaped part arranged in a common bile duct for supporting and guiding and a drainage part led out of the body through the abdominal wall, and the drainage part is connected with an external drainage bag for collecting bile. The T-shaped part comprises a supporting part which is formed by sectioning the end part of the drainage part along the diameter of the section, and the supporting part is arranged and supported along the common bile duct; when the drainage pipeline is taken out, the operating rod enters the drainage part from one end of the drainage part and forms a supporting end part at a connecting port of the drainage part and the supporting part, and the supporting part is driven by the binding piece to be collected towards the supporting end part and then falls out of the body along with the drainage part. An existing T-shaped drainage tube is improved with a low-cost simple structure, the size can be reduced during tube drawing, and tube drawing is facilitated.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to an internal and external layer bile duct fixation and drainage pipeline. Background Art

[0002] The biliary drainage T-tube is a special tubular instrument used for common bile duct drainage in hepatobiliary surgery. It is named because its shape is "T". It consists of a short arm perpendicular to the long arm and a long arm 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 an external drainage device. Its main function is that after the common bile duct is incised, placing a T-tube can effectively drain bile, reduce the pressure in the biliary tract, 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, avoiding biliary stricture caused by postoperative scar hyperplasia and providing a stable environment for bile duct healing. In addition, the T-tube can also be used as a channel for postoperative biliary tract imaging, facilitating doctors to observe whether there are residual stones or strictures in the biliary tract. If necessary, operations such as fiberoptic choledochoscopy lithotripsy can be performed through the T-tube sinus tract.

[0003] Specifically in the operation, during the operation, after the doctor incises the common bile duct to remove stones or relieve obstruction, the short arm of the T-tube is gently placed into the common bile duct to ensure that the short arm is fully unfolded and located in the bile duct. Then, the common bile duct incision is sutured, and the long arm is led out through a stab hole in the abdominal wall beside the incision and fixed to the abdominal wall skin to prevent it from slipping out. An external sterile drainage bag is connected to collect bile. After the operation, it is necessary to closely observe the volume, color, and properties of the drained bile, regularly change the drainage bag and keep the drainage tube unobstructed. A clamping test can be performed 1-2 weeks after the operation. If the patient has no discomfort such as abdominal pain, fever, or jaundice, and it is confirmed by T-tube cholangiography that the biliary tract is unobstructed, there are no residual lesions, and the sinus tract is formed well (usually 2-4 weeks after the operation, the sinus tract is formed by fibrous tissue wrapping to prevent bile leakage), the T-tube can be removed. After the tube is removed, the sinus tract will close automatically without suture. Through precise pipeline support and drainage throughout the process, the recovery and reconstruction of biliary tract function are achieved.

[0004] For the existing T-tube structure, usually, after cutting a part of the tube body of the existing rubber T-tube, it is placed into the biliary tract. Although this material is a soft rubber material, because of its T-tube structure itself, its expansion and extension effect is good, and it is not easy to take out when removing the tube, often resulting in bleeding or even a large opening that cannot heal in time at the biliary tract incision, and the operation is inconvenient. The existing improvement methods are all to cut as much length as possible to form a shorter T-shaped part, but this method will result in a poor support effect of the T-shaped part placed in the biliary tract and is prone to deformation and torsion. 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 contracted from the outside for easy removal when the tube is removed.

[0006] The technical solution adopted by the present invention is: In a first aspect, the present invention provides an inner and outer layer bile duct fixed drainage conduit, 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 led out of the body through the abdominal wall, and is connected to an external drainage bag for collecting bile through the drainage portion, wherein 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 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 along with the drainage part.

[0007] 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.

[0008] In combination with the first embodiment of the first aspect, the present invention provides a second embodiment of the first aspect, wherein the external turning piece is a strip of elastic material embedded in the drainage portion and extending along the length direction of the drainage portion.

[0009] In combination with the first aspect, the present invention provides a third implementation of the first aspect, wherein the restraining member is a pull rope having one end connected to the end of the support portion, and the other end of the pull rope extends toward the outside along the drainage portion and extends out from the outer end of the drainage portion to form an operating end; The operating rod is a pipe fitting. When the drainage pipeline 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.

[0010] 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 is folded and gathered toward the support end portion.

[0011] 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 cord operation end.

[0012] In combination with the first aspect, the present invention provides a sixth implementation of the first aspect, wherein the restraining member is a sleeve disposed at the connection between the drainage portion and the support portion, the sleeve comprises an inner ring located inside the drainage portion and an outer ring located outside the drainage portion, the connection between the outer ring and the inner ring is located at the connection gap between the two support portions and the drainage portion, two waist-shaped holes are formed by separating the annular space formed between the inner ring and the outer ring by the connection portion, and the support portion passes through the waist-shaped hole; When the drainage tube is taken out, the operating rod abuts against the inner ring from the inner side of the drainage part and pulls the drainage part outwards to make the supporting part converge toward the sleeve ring and exit the body with the drainage part.

[0013] In combination with the sixth implementation of the first aspect, the present invention provides a seventh implementation 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.

[0014] 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 pipeline is connected to the drainage bag.

[0015] 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 taking out the drainage pipeline, the drainage portion nested in the reduced diameter portion is displaced relative to the operating rod to take out the drainage portion.

[0016] The beneficial effects of the present invention are: (1) The support structure of the present invention is formed 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 of the existing T-shaped tube, the pressure caused by the removal of the bile duct incision is smaller; (2) The present invention provides an axially incompressible strip structure, and when removing the drainage tube, the supporting parts on both sides can be closed and bounded toward the middle by a binding member, thereby reducing the cross-sectional size of the tube inside the bile duct when removing the drainage tube, which is conducive to the rapid removal of the drainage tube and reduces the tearing effect on the bile duct opening. The operation is simple and the soft nature of the drainage tube itself is not changed; (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. (4) The present invention provides a sleeve 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, thereby providing a better retraction effect and less impact on the bile duct opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic plan view of the first type of fixed drainage pipeline in the embodiment of the present invention; Figure 2 is an axonometric view of the first type of fixed drainage pipeline in the embodiment of the present invention; Figure 3 is the present invention Figure 2 partial enlarged schematic view of A therein; Figure 4 is a schematic plan view of the second type of fixed drainage pipeline in the embodiment of the present invention; Figure 5 is the present invention Figure 4 partial enlarged schematic view of B therein; Figure 6 is an axonometric view of the second type of fixed drainage pipeline in the embodiment of the present invention; Figure 7 is a first-state plan view of the third type of fixed drainage pipeline in the embodiment of the present invention; Figure 8 is a second-state plan view of the third type of fixed drainage pipeline in the embodiment of the present invention; Figure 9 is a first-state axonometric view of the third type of fixed drainage pipeline in the embodiment of the present invention; Figure 10 is the present invention Figure 9 partial enlarged schematic view of C therein; Figure 11 is a second-state axonometric view of the third type of fixed drainage pipeline in the embodiment of the present invention; Figure 12 is a schematic structural view of the third type of fixed drainage pipeline after partial sectioning in the embodiment of the present invention.

[0018] In the figure: 1 - drainage part, 2 - support part, 3 - pull rope, 4 - operating rod, 5 - collar, 501 - inner ring, 502 - outer ring, 503 - kidney-shaped hole. 6 - inner wall sleeve. Detailed implementation manners

[0019] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0021] Accordingly, 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 claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0022] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0023] In the description of the present application, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application. In addition, in the description of the present application, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0024] In addition, in the description of the present application, if terms such as "horizontal" and "vertical" are used, it does not mean that the components are required to be absolutely horizontal or hanging vertically, but they can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0025] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "connected" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0026] Embodiment 1: This embodiment discloses an internal and external bile duct fixation and drainage pipeline, which is used for supporting and draining the bile duct and connecting an external drainage bag to collect bile and stones. The drainage pipeline in this embodiment is mainly a T-shaped tube structure, which has a T-shaped part and a drainage part 1. The T-shaped part includes two support parts 2 that are turned outwards and unfolded. During use, a bile duct incision will be made first, and the two support parts 2 will be manually closed and inserted into the bile duct in the closed state. Then, the support parts 2 will be unfolded along the length direction inside the common bile duct to form a support. After that, the part where the drainage part 1 passes through will be wrapped by suturing the opening, and the end of the drainage part 1 that passes through the body will be connected to a drainage bag or other structures to complete the drainage operation process.

[0027] In view of the existing method, a T-shaped tube is directly used for cutting. The cutting methods include shortening the two ends of the T-shaped part or horizontally cutting along the midline of the T-shaped part to form a semi-cylindrical structure. The T-shaped part in this embodiment is formed by cutting a complete rubber drainage part 1 along any diameter of the cross-section to form two symmetrical support parts 2.

[0028] The T-shaped part in this embodiment includes two setting methods. One is to directly cut the support part 2 according to the standard specifications during factory production, and when packaging, it is closed and transported in the form of a single pipe structure. The user removes the drainage part 1 from the package before the operation and separates its end to form two support parts 2 for use. The other is a complete single pipe structure before leaving the factory, with a cutting line marked at one end of the drainage part 1. After the user removes the drainage tube from the package, the support part 2 can be cut along the cutting line according to the needs, so as to be more suitable for the situation of each different patient during the operation.

[0029] Since the drainage pipeline itself is a pipe structure with two ports, after one end port is cut to form two semi-cylindrical support parts 2, the 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 turned outwards during use, the port on this side is not blocked, and bile or stones in the bile duct can flow out from the drainage part 1 through this port.

[0030] It should be noted that the above modification of the drainage pipeline in this embodiment is to facilitate the smooth removal of the drainage pipeline under the premise of minimizing the impact on the wound after the drainage is completed in 2-4 days after the operation. Because when removing the drainage tube after the operation, there is no need for a second operation. It can be directly pulled out from the body outside the hospital, and the originally smaller opening where the bile duct flows out will heal automatically. Only need to pay attention to whether there is a large amount of bile flowing out.

[0031] That is, in addition to transforming the T-shaped part at the end of the drainage part 1 into the support part 2 formed by cutting and separating a single pipe, other structures that are convenient for manual tube removal are also provided, including an independently used operating rod 4 and a restraint.

[0032] Among them, the operating rod 4 has a bar-shaped structure, and its size is adapted to the inside of the drainage part 1, that is, it can penetrate into the drainage part 1 from one end. The operating rod 4 is made of two materials, bendable and non-bendable, and both materials have the characteristic of axial compression resistance. The so-called axial compression resistance means that the operating rod 4 itself is similar to an endoscope structure. When an axial force is applied to one end of the operating rod 4, there will definitely be a tendency for the other end of the operating rod 4 to move axially. However, in general use, the material of the operating rod 4 with a relatively small bending amplitude is adopted to ensure its use stability.

[0033] In this embodiment, the operating rod 4 and the drainage part 1 are a set of equipment, that is, a single operating rod 4 will be attached in the same package when leaving the factory. In the conventional technology, the drainage part 1 is a disposable device, and the operating rod 4 can be a reusable device, which is made of metal or other materials convenient for high-temperature disinfection 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 removing the tube, after removing the drainage bag, the operating rod 4 is inserted into the drainage part 1 from the port of the drainage part 1 and slowly extended inward until the end of the operating rod 4 reaches the connection between the drainage part 1 and the support part 2, that is, the inner opening end face of the drainage part 1.

[0034] In this embodiment, in order to facilitate observing whether the operating rod 4 is inserted in place, a mark will be set on the operating rod 4. This mark is generally a kind of scale, that is, it indicates the length of the operating rod 4 inserted relative to the port of the drainage tube. There are two judgment methods. One is that the standard range value of the insertion length will be calibrated before leaving the factory, that is, according to the length of the drainage tube itself, the length range is marked at the corresponding position of the operating rod 4. When the mark of this length range appears at the port of the drainage part 1, it indicates that the insertion depth reaches the appropriate position, and a support end of the operating rod 4 with an appropriate length is formed at the connection between the drainage part 1 and the support part 2. The other is that it is not marked before leaving the factory, but the user determines the position of the support part 2 first after taking it out before the operation. First, insert the operating rod 4 outside the body and adjust it to the appropriate position, and then manually mark the corresponding position on the operating rod 4. The marking method can be to mark with a marker pen that meets the medical standards, or to mark by forming a groove on the surface of the operating rod 4, which can be used as the determination of the insertion depth when removing the drainage pipeline.

[0035] Furthermore, the restraining member is a limiter provided on the drainage portion 1, and the limiter can pull out the drainage tube through external operation after the operating rod 4 is inserted into place, and can gather the support portions 2 on both sides toward the support end before or while pulling out, thereby reducing the volume of the pull-out and avoiding a greater 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 inside by relying on external operation, so it is necessary to set the operating rod 4 as a hard structure to form a support end at its end, which serves as a support point of the restraining member to provide a supporting force. 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 be retracted relative to the support end.

[0036] Furthermore, preferred limitations are made based on the above-mentioned restraining members, and corresponding operating method instructions are provided for each restraining member.

[0037] As an embodiment, referring to Figures 1-3 , the figure shows a method for implementing a drainage pipeline.

[0038] The drainage pipeline includes an integrated drainage portion 1 and a support portion 2, wherein the support portion 2 is a symmetrical two semi-cylindrical structure formed by cutting a certain length of a port on one side of the drainage portion 1 along the midline, and an outward folding force is provided by embedding an outward folding elastic member at the connection between the support portion 2 and the drainage portion 1. In this embodiment, the elastic member is a rubber rib, which is elastically stretched and attached 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, and by setting a suitable length, the folding angle between the support portion 2 and the drainage portion 1 is about 90 degrees when no force is applied.

[0039] It also includes an operating rod 4, which is a pipeline 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.

[0040] 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 outer end of the drainage portion 1 as an operating part.

[0041] In actual operation, an enlarged cavity is provided at the external port of the drainage part 1, which can be used to place two overlong pull ropes 3, so that the drainage of bile will not be affected when the drainage part 1 is connected to the external drainage bag. When the tube needs to be removed, the drainage bag is first removed, and then the pull rope 3 is pulled out of the enlarged cavity to a certain length.

[0042] Then place the operating rod 4 at the outer port of the drainage section 1, insert the pull rope 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 is inserted into the drainage section 1 by a corresponding length, it can be confirmed from the outside of the body through the mark that it has a support end inserted into the bile duct, and then pull the two pull ropes 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 position of the operating rod 4 and the drainage section 1 unchanged, and continue to pull the pull rope 3 until the operating rod 4 and the drainage section 1 can be pulled out relatively easily, and the extubation process is completed.

[0043] 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 2 In 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 gather 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 from the outside at the same time, 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 with the drainage part 1 gathered outward, which can not only have a small impact on the opening of the bile duct, but also will not affect the state of the bile duct itself when gathering in the bile duct.

[0044] As an embodiment, referring to Figures 4-6 , based on the pull rope 3 scheme of the previous embodiment, the structure of the support part 2 is further optimized and improved.

[0045] The support part 2 shown in the figure is a foldable structure, 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 elastic unfolded state. When subjected to the pulling force of the pull rope 3, Figure 6In the state, the unilateral support part 2 contracts inward in a folded manner. Since the acting force of the pull rope 3 is towards the outside of the drainage part 1, it will eventually cause it to contract to form a tubular wall structure, thus achieving the optimal extraction volume.

[0046] As an implementation method, referring to Figures 7-12 , the figure shows the third solution, that is, a restraint structure different from the pull rope 3.

[0047] Referring to Figure 10 , the restraint in this implementation method is a collar 5. The collar 5 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. Since the two connecting parts divide the annular gap between the inner ring 501 and the outer ring 502 into two waist-shaped holes 503.

[0048] When setting, the collar 5 is sleeved inward from the ends of the two support parts 2 at the same time, so that the two support parts 2 respectively pass through the two waist-shaped holes 503, and then the collar 5 is continuously slid inward until it contacts the port of the drainage part 1 and is fixed. When intubating, 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. And the inner ring 501 of the collar 5 will be placed inside the port of the drainage part 1. When it needs to be taken out, the end of the inserted operating rod 4 will abut against the inner ring 501 from the inside of the drainage part 1. After abutting, it can provide a supporting force for the whole collar 5. At this time, keep the operating rod 4 fixed, and then pull the drainage part 1 outward. Since the length of the operating rod 4 is longer than that of the drainage part 1, and 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 biliary tract, the operating rod 4 always has a part that falls out of the drainage part 1.

[0049] Since the operating rod 4 is kept fixed, when the drainage part 1 moves outward relative to the operating rod 4, the two support parts 2 on both sides will be guided by the collar 5 to converge towards the middle. Referring to Figure 11 and Figure 12 , the state shown in the figure is the restraint state formed by pulling the drainage part 1 outward by a certain length. It can be seen that the convergence position will always be at the biliary tract opening. This way will cause the support part 2 to keep flipping while gradually approaching the support end of the operating rod 4, and bend and converge at the support end, and keep the smallest cross-sectional area when falling out of the biliary tract opening, so as to have a lower impact and will not overly tear the biliary tract opening.

[0050] It should be noted that the material of the inner ring 501 itself is a medical decomposable material. Even if it falls into the biliary tract during extubation, it will be discharged out of the body or decomposed and discharged in the body. But in another way, a swelling end is provided at the end of the support part 2. By the swelling end, it is ensured that when the end of the support part 2 finally contacts the collar 5, the whole collar 5 can be pulled out to avoid its retention in the body.

[0051] It should also be noted that the solution provided in this embodiment does not limit the specific materials and dimensions. For those skilled in the art, the above solution will meet the relevant medical specifications and requirements during implementation. At the same time, there may be more complex telescopic structure alternative solutions in the prior art, but the effect that this application aims to achieve is operable at low cost. It is optimized based on the existing material structure, with low material cost and convenient and reliable operation.

[0052] The present invention is not limited to the above optional implementation manners, and anyone can obtain other various forms of products under the inspiration of the present invention. The above specific implementation manners should not be construed as limiting the protection scope of the present invention. The protection scope of the present invention should be defined by the claims, and the specification 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 comprises an operating rod (4) having axial compression resistance and a restraining member. When the drainage tube is removed, the operating rod (4) enters the drainage portion (1) from one end of the drainage portion (1) and forms a supporting end portion at the connection port between the drainage portion (1) and the supporting portion (2). The restraining member drives the supporting portion (2) to converge towards the supporting end portion and then falls out of the body along with the drainage portion (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 externally turned 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 restraining member is a pull rope (3) with one end connected to the end of the support portion (2), and the other end of the pull rope (3) extends toward the outside along the drainage portion (1) and protrudes 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 pipeline 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 cause the support part (2) to converge toward the support end.

5. The inner and outer layer bile duct fixed drainage tube according to claim 4, 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 towards the support end portion.

6. The inner and outer layer bile duct fixed drainage tube according to claim 4, characterized in that: The drainage portion (1) has an enlarged cavity at the external port for accommodating the operating end of the pull cord (3).

7. The inner and outer layer bile duct fixed drainage tube according to claim 1, characterized in that: The restraining member is a sleeve (5) sleeved at the connection between the drainage portion (1) and the support portion (2), the sleeve (5) comprising an inner ring (501) located inside the drainage portion (1) and an outer ring (502) located outside the drainage portion (1), the connection between the outer ring (502) and the inner ring (501) being located at the connection gap between the two support portions (2) and the drainage portion (1), and two waist-shaped holes (503) are formed by the connection at the annular space formed between the inner ring (501) and the outer ring (502), and the support portion (2) passes through the waist-shaped holes (503); When removing the drainage tube, the operating rod (4) abuts against the inner ring (501) from the inside of the drainage portion (1) and pulls the drainage portion (1) outwards so that the support portion (2) is gathered toward the collar (5) and falls out of the body along with the drainage portion (1).

8. The inner and outer layer bile duct fixed drainage tube according to claim 7, characterized in that: The end of the support portion (2) has an enlarged end for limiting the collar (5) from detaching from the drainage pipeline.

9. The inner and outer layer bile duct fixed drainage tube according to claim 7, 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 pipeline is connected to the drainage bag.

10. The inner and outer layer bile duct fixed drainage tube according to claim 9, characterized in that: The operating rod (4) has a reduced diameter portion with a gradually decreasing outer diameter, and when removing the drainage pipeline, the drainage portion (1) nested in the reduced diameter portion is operated to move relative to the operating rod (4) to remove the drainage portion (1).

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