Intrahepatic biliary drainage tube with angle

Abstract

The utility model discloses an intrahepatic bile duct drainage tube, especially an intrahepatic bile duct drainage tube with an included angle, comprising: a pipe body, the front end of which is thickened in a non-bending area, forcing the bending of the area with thinner wall to form an included angle alpha, and the side holes are uniformly distributed on the two sides of the pipe segment of the included angle alpha. The utility model solves the technical problem of reducing the risk of displacement or slipping of the intrahepatic bile duct drainage tube during the intrahepatic bile duct drainage process. In the utility model, the front end of the intrahepatic bile duct drainage tube is thickened in a non-bending area, forcing the bending to occur in the area with thinner wall, accurately controlling the position and angle of the bending point, forming an included angle at the front end of the intrahepatic bile duct drainage tube, and reducing the risk of displacement or slipping of the drainage tube during the intrahepatic bile duct drainage process, which is suitable for the scene requiring long-term drainage (such as malignant obstruction that cannot be operated).

Description

Technical Field

[0001] This utility model relates to an intrahepatic bile duct drainage tube, and more particularly to an intrahepatic bile duct drainage tube with an angle. Background Technology

[0002] In interventional radiology, intrahepatic bile duct drainage is a common procedure used to relieve biliary obstruction and drain bile.

[0003] Commonly used catheter types for intrahepatic bile duct drainage include straight catheters or drainage tubes with side holes (such as PTCD catheters), used for percutaneous transhepatic cholangiopancreatography (PTCD) or endoscopic nasobiliary drainage (ENBD). However, when long-term indwelling catheters are required (such as inoperable malignant obstruction), these types of catheters are prone to displacement or slippage.

[0004] The pigtail-shaped drainage tube has a looped end, which reduces the risk of catheter displacement or slippage, making it suitable for scenarios requiring long-term drainage (such as nephrostomy and thoracic drainage). However, when used for bile duct drainage, it has potential risks and limitations: if the bile duct is narrow or thin, the looped end may not fully unfold, leading to poor drainage or bile duct injury; and it is also highly difficult to operate, requiring precise positioning during placement to avoid damage to the bile duct wall by the catheter tip.

[0005] Therefore, the applicant proposes this utility model. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of the prior art by providing an angled intrahepatic bile duct drainage tube that can reduce the risk of displacement or slippage and is suitable for long-term drainage.

[0007] To achieve the above objectives, the present invention provides an intrahepatic bile duct drainage tube with an angled attachment, comprising: The tube body has a thickened non-bending area at its front end, which forces the thinner section of the tube wall to bend to form an angle α, and side holes are evenly distributed on both sides of the tube segment at the angle α; the angle α is 40°, which can better fit the anatomical structure of the intrahepatic bile duct.

[0008] This invention provides an intrahepatic bile duct drainage tube whose front end is thickened in a non-bending area, forcing the bend to occur in a thinner wall region, thus precisely controlling the position and angle of the bend. Firstly, an angle is formed at the front end of the intrahepatic bile duct drainage tube, allowing the bend to be engaged at a stenotic point in the bile duct (such as a bend in the bile duct), similar to forming a physical "anchor point" after unfolding within the bile duct. This physical resistance reduces tube slippage. Simultaneously, when the patient moves or the tube is pulled externally, the bend can absorb some of the external force through deformation, preventing direct force transmission to the end of the tube. The multi-point contact of the bend structure also disperses the force at a single point, reducing tube displacement due to local tissue movement. Therefore, it reduces the risk of tube displacement or slippage during intrahepatic bile duct drainage, making it suitable for scenarios requiring long-term drainage. Secondly, local thickening increases the bending stiffness of specific areas, making them less prone to collapse or deformation during bending, thereby enhancing structural stability. Simultaneously, the thickened area limits the bending radius of the drainage tube, preventing rupture due to excessive bending. Furthermore, compared to pigtail-shaped drainage tubes with their ends coiled into loops, this intrahepatic bile duct drainage tube has a smaller bending radius. It can fully flatten or bend within narrow or slender bile ducts, effectively preventing drainage obstruction or bile duct damage. It also allows for precise placement, avoiding damage to the bile duct wall from the catheter tip. Finally, in cases where the biliary obstruction is located at a bile duct branching point, the two segments of this intrahepatic bile duct drainage tube can enter different bile duct branches at their respective angles, better conforming to the anatomical structure of the intrahepatic bile ducts. This not only allows for simultaneous drainage but also reduces drainage resistance and improves drainage effectiveness.

[0009] In the aforementioned angled intrahepatic bile duct drainage tube, the thicker wall region is preferably selected as a series of thickened rings spaced apart along the length of the tube. Furthermore, the intrahepatic bile duct drainage tube is more preferably made of a material with good flexibility, high fatigue resistance, and good biocompatibility (such as medical-grade silicone rubber or polyurethane). The thickened region can balance rigidity and flexibility by adjusting the material hardness (e.g., co-extruding materials of different hardness).

[0010] To facilitate clear visualization of the drainage tube's location and direction during imaging examinations (such as X-ray, CT, or fluoroscopy) and reduce operational risks, the aforementioned angled intrahepatic bile duct drainage tube preferably incorporates a radiopaque marker in the curved area of ​​the tube body. Furthermore, the radiopaque marker material is preferably barium sulfate, a metallic component (titanium, stainless steel, or platinum / gold), or a radiopaque polymer (a polymer material mixed with elements such as barium and bismuth).

[0011] To effectively prevent displacement or dislodgement of the drainage tube and improve operational stability, the aforementioned angled intrahepatic bile duct drainage tube preferably includes a fixing device at the end of the tube body. Further, the fixing device is preferably a fixing wing or a fixing ring. Even further, the fixing wing or fixing ring is preferably made of soft medical-grade silicone rubber material, which can closely conform to the patient's skin tissue.

[0012] Compared with the prior art, the intrahepatic bile duct drainage tube with an angle obtained by this utility model has the following technical effects: First, an angle is formed at the front end of the intrahepatic bile duct drainage tube, and the curved part can be locked at the narrow part of the bile duct (such as the bend of the bile duct), similar to forming a physical "anchor point" after unfolding in the bile duct. The physical resistance reduces the slippage of the drainage tube. At the same time, when the patient moves or the drainage tube is pulled externally, the curved part can absorb some of the external force through deformation, avoiding the force from being directly transmitted to the end of the drainage tube. The multi-point contact of the curved structure also disperses the force on a single point, reducing the displacement of the drainage tube caused by the movement of local tissues. Therefore, the risk of drainage tube displacement or slippage can be reduced during intrahepatic bile duct drainage, which is suitable for scenarios that require long-term drainage.

[0013] Secondly, local thickening can improve the bending stiffness of specific areas, making them less prone to collapse or deformation when bending, thereby enhancing structural stability. At the same time, the thickened area can limit the bending radius of the drainage tube, preventing rupture due to excessive bending.

[0014] Furthermore, compared to the pigtail-shaped drainage tube with its end coiled into a loop, this intrahepatic bile duct drainage tube has a smaller bending radius, allowing it to fully flatten or bend in narrow or slender bile ducts, thus effectively avoiding "poor drainage or bile duct damage." At the same time, it can be precisely positioned during placement to prevent the catheter tip from damaging the bile duct wall.

[0015] Next, if the biliary obstruction area is located at a bile duct branching node, the two segments of the intrahepatic bile duct drainage tube can enter different bile duct branches at the angle, better conforming to the anatomical structure of the intrahepatic bile duct. This not only allows for simultaneous drainage but also reduces drainage resistance and improves drainage effectiveness.

[0016] Finally, imaging markers are provided in the curved areas of the tube body, which facilitates clear display of the position and direction of the drainage tube during imaging examinations (such as X-ray, CT, or fluoroscopy), reducing operational risks. At the same time, a fixing device is provided at the end of the tube body, which can effectively prevent the drainage tube from shifting or dislodging, improving the stability of the operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an intrahepatic bile duct drainage tube with an angle (partial cross-section view). Figure 2This is a schematic diagram of the structure of an intrahepatic bile duct drainage tube with an angled opening after a trocar is inserted. Figure 3 This is a schematic diagram of a structure in which an angled intrahepatic bile duct drainage tube is introduced into the intrahepatic bile duct; Figure 4 This is a schematic diagram of another type of intrahepatic bile duct drainage tube with an angle (partial cross-section view). Figure 5 yes Figure 4 A magnified view of a section at point A in the middle; Figure 6 This is a schematic diagram of the third type of intrahepatic bile duct drainage tube with an angle.

[0018] In the diagram: tube body 1, thickened ring 1-1, side hole 1-2, radiopaque marker 2, fixing wing 3, cannula sheath 4, bile duct 5, bile duct obstruction 6. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0020] like Figure 1 As shown, in one embodiment of this utility model, the intrahepatic bile duct drainage tube with an angle provided in this embodiment includes: The tube body 1 has thickened rings 1-1 spaced apart along its length through a thickened non-bending region at its front end, which forces the thinner tube wall region to bend to form an included angle α, and side holes 1-2 are evenly distributed on both sides of the tube segment at included angle α; the included angle α is 40°, which can better fit the anatomical structure of the intrahepatic bile duct.

[0021] First, the angled design at the tip of the intrahepatic bile duct drainage tube reduces the risk of displacement or slippage during drainage of the intrahepatic bile duct 5, making it suitable for scenarios requiring long-term drainage. Second, local thickening increases the bending stiffness of specific areas, making them less prone to collapse or deformation during bending, thus enhancing structural stability. The thickened area also limits the bending radius of the drainage tube, preventing rupture due to excessive bending. Third, compared to pigtail-shaped drainage tubes with a coiled end, this intrahepatic bile duct drainage tube has a smaller bending radius, allowing it to fully flatten or bend in narrow or slender bile ducts 5, effectively preventing "poor drainage or bile duct 5 damage." It also allows for precise positioning during placement, avoiding damage to the bile duct wall by the catheter tip. Finally, in the event of biliary obstruction at the location of the bile duct branch node 5, the segments on both sides of the angle of this intrahepatic bile duct drainage tube can enter different bile duct branches 5, better conforming to the anatomical structure of the intrahepatic bile duct 5. This not only allows for simultaneous drainage but also reduces drainage resistance and improves drainage effectiveness.

[0022] Furthermore, to facilitate clear visualization of the drainage tube's location and direction during imaging examinations (such as X-ray, CT, or fluoroscopy) and reduce operational risks, as a second embodiment of this utility model, such as... Figure 4 and Figure 5 As shown, in this embodiment, a developing marker 2 is also provided in the curved area of ​​the tube body 1.

[0023] In this embodiment, the intrahepatic bile duct drainage tube is made of medical-grade silicone rubber, while the contrast marker 2 is made of metal and embedded in the tube wall.

[0024] Meanwhile, in order to effectively prevent the drainage tube from shifting or coming out and to improve the stability of operation, as a third embodiment of this utility model, such as... Figure 6 As shown, in this embodiment, a fixing wing 3 is also provided at the end of the tube body 1. The fixing wing 3 is also made of soft medical-grade silicone rubber material, which can fit closely to the patient's skin tissue.

[0025] like Figure 3 As shown, the intrahepatic bile duct drainage procedure using the aforementioned angled intrahepatic bile duct drainage tube generally follows these steps: Step 1: Locate the puncture point and puncture path under ultrasound and DSA guidance. Step 2: First, puncture the intrahepatic bile duct 5 under ultrasound guidance. After successful puncture, bile drainage can be observed, and the location is shown on DSA imaging. Then, a percutaneous guidewire is introduced, and a super-slippery guidewire is introduced into the intrahepatic bile duct 5 through the guidewire. Finally, under fluoroscopic guidance, a guidewire is inserted... Figure 2 The cannula sheath 4 of the cannula needle and the intrahepatic bile duct drainage tube with an angle are shown on the angiography. The tip of the tube is located in the intrahepatic bile duct 5. Finally, the position of the drainage tube is fixed and a drainage bag is connected to it.

[0026] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. An intrahepatic bile duct drainage tube with an angle, characterized in that... include: The pipe body has a thickened non-bending area at its front end, which forces the thinner pipe wall area to bend to form an included angle α, and side holes are evenly distributed on the pipe sections on both sides of the included angle α.

2. The intrahepatic bile duct drainage tube with an angle as described in claim 1, characterized in that: The thicker areas of the pipe wall are thickened rings that are spaced apart along the length of the pipe.

3. An intrahepatic bile duct drainage tube with an angle as described in claim 1 or 2, characterized in that: The included angle α is 40°.

4. An intrahepatic bile duct drainage tube with an angle as described in claim 1 or 2, characterized in that: Development markers are provided in the curved areas of the tube.

5. The intrahepatic bile duct drainage tube with an angle as described in claim 3, characterized in that: Development markers are provided in the curved areas of the tube.

6. An intrahepatic bile duct drainage tube with an angle as described in claim 1 or 2, characterized in that: A fixing device is provided at the end of the tube.

7. The intrahepatic bile duct drainage tube with an angle as described in claim 3, characterized in that: A fixing device is provided at the end of the tube.

8. The intrahepatic bile duct drainage tube with an angle as described in claim 4, characterized in that: A fixing device is provided at the end of the tube.

9. The intrahepatic bile duct drainage tube with an angle as described in claim 5, characterized in that: A fixing device is provided at the end of the tube.

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