Biliary tract drainage tube

Abstract

The utility model relates to the technical field of medical instruments, in particular to a biliary tract drainage tube. The biliary tract drainage tube comprises a catheter body, a locking traction wire and an adjusting and shaping mechanism, the catheter body comprises a liquid cavity, a first threading cavity and a second threading cavity, the first threading cavity and the second threading cavity are located on the two sides of the liquid cavity, the locking traction wire penetrates in from the first threading cavity and penetrates out from the second threading cavity, and the end, penetrating out of the second threading cavity, of the locking traction wire is connected with the adjusting and shaping mechanism. The adjusting and shaping mechanism can tension or loosen the locking traction wire; the catheter body is provided with a tip, and the tip can contract to form a closed circular ring under the action of the locking traction wire. The biliary tract drainage tube provided by the utility model realizes effective separation of the locking traction wire and the liquid cavity, so that the liquid cavity in the middle can be smoothly and efficiently dosed, the locking traction wire is easily retracted and released, the phenomena of air leakage and liquid leakage are relieved, external bacteria are not easy to invade, and secondary infection is not caused.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a bile duct drainage tube. Background Art

[0002] A biliary drainage tube is a medical device that is placed percutaneously and transhepatically into the bile duct or gallbladder under imaging guidance for bile drainage or biliary irrigation. Due to its smooth and soft surface, good biocompatibility, and multiple drainage holes, it is widely used clinically.

[0003] The existing biliary drainage tube consists of a tube seat, a drainage tube body and a locking system. The tip of the drainage tube body is generally curled into a pigtail shape, which is used to fix the inner cavity and prevent the catheter from shifting and slipping. The drainage tube body is soft and smooth, has good X-ray development effect, has a large inner cavity, and multiple side holes in the tube wall can fully drain. The locking system has a locking wire, which is used to curl and fix the pigtail-shaped tip to prevent it from deforming in the body. The locking mechanism of the existing locking system is relatively sharp, and the locking wire is easy to break during operation. In addition, the locking mechanism is mostly snap-on or concave-convex fitting. It is not easy to open and close after locking, and it is easy to be damaged after multiple switches, affecting the surgical effect and increasing the difficulty of the operation for medical staff. After locking, the locking wire is easy to loosen or slip, causing the pigtail-shaped tip to deform, resulting in complications such as catheter displacement and slippage. The inlet and outlet of the locking wire of the locking system are the same as the inlet and outlet of the solution cavity, often accompanied by air leakage and liquid leakage, which makes it easy for external bacteria to invade and cause secondary infection. Utility Model Content

[0004] The utility model aims to provide a biliary drainage tube to alleviate the problem of secondary infection caused by the lock line inlet and outlet of the existing locking system being the same as the solution chamber inlet and outlet.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0006] A biliary drainage tube comprises: a catheter body, a locking traction wire, and an adjustment and shaping mechanism. The catheter body comprises a liquid cavity and a first threading cavity and a second threading cavity located on either side of the liquid cavity. The locking traction wire enters the first threading cavity and exits the second threading cavity. One end of the locking traction wire exiting the second threading cavity is connected to the adjustment and shaping mechanism. The adjustment and shaping mechanism is capable of tightening or loosening the locking traction wire.

[0007] The catheter body has a tip, and the tip can be contracted to form a closed loop under the action of the locking traction wire.

[0008] Furthermore, the adjustment and shaping mechanism includes an adjustment handwheel and a limiting paddle. One end of the locking traction wire passing through the second threading cavity is connected to the adjustment handwheel. The adjustment handwheel is provided with a one-way tooth structure along the circumference. The limiting paddle cooperates with the one-way tooth structure to enable the adjustment handwheel to rotate in one direction.

[0009] Furthermore, the limiting paddle has a wedge-shaped structure, and a protruding strip is provided at the end of the limiting paddle.

[0010] Furthermore, the adjusting and shaping mechanism further includes a supporting elastic member, one end of which is elastically connected to the limiting paddle.

[0011] Furthermore, a sealing gasket is provided at the side hole where the locking traction wire passes through the second threading cavity, and the sealing gasket has a one-way sealing structure.

[0012] Furthermore, the catheter body is provided with a first developing ring, a second developing ring and a locking traction wire return port in sequence from the distal end to the proximal end. The locking traction wire passes out from the first threading cavity and passes into the second threading cavity from the locking traction wire return port.

[0013] Furthermore, the catheter body is provided with a plurality of liquid inlet and outlet ports between the first developing ring and the second developing ring.

[0014] Furthermore, the locking traction wire is a nickel-titanium wire.

[0015] Furthermore, it also includes a catheter seat, which is arranged at one end of the locking traction wire passing through the second threading cavity, and the adjustment and shaping mechanism is installed on the catheter seat.

[0016] Furthermore, one end of the catheter seat is a Luer connector, and the other end is a docking cavity that cooperates with the catheter body, and one end of the locking traction wire is bonded to the docking cavity together with the catheter body.

[0017] The utility model brings at least the following beneficial effects:

[0018] The utility model provides a biliary drainage tube, comprising: a catheter body, a locking traction wire and an adjustment and shaping mechanism, the catheter body comprising a liquid cavity and a first threading cavity and a second threading cavity located on both sides of the liquid cavity, the locking traction wire passing through the first threading cavity and passing through the second threading cavity, one end of the locking traction wire passing through the second threading cavity is connected to the adjustment and shaping mechanism, and the adjustment and shaping mechanism can tighten or loosen the locking traction wire; the catheter body has a tip, and the tip can contract to form a closed loop under the action of the locking traction wire.

[0019] The catheter body includes a liquid cavity, a first threading cavity and a second threading cavity, and the locking traction wire is threaded through the first threading cavity and the second threading cavity. The three-cavity catheter body can achieve effective separation of the locking traction wire and the liquid cavity, so that the liquid cavity in the middle can smoothly and efficiently deliver drugs, and release more space for drug delivery or drainage under the same conditions, thereby accelerating the treatment speed and ensuring the drainage effect. At the same time, it effectively solves the problem that the existing locking traction wire is difficult to accurately retract and release due to being set in a large lumen. The locking traction wire and the first threading cavity and the second threading cavity can form a standard full match, effectively alleviating the phenomenon of air leakage and liquid leakage, making it difficult for external bacteria to invade and not causing secondary infection. By adjusting the shaping mechanism to tighten or loosen the locking traction wire, the locking traction wire can be easily retracted and released without worrying about the problem of the locking traction wire breaking due to jamming. The operator can adjust the retraction and release at any time according to the actual situation during the operation, which improves the ease of use and reduces the operator's tension during the operation, which is conducive to achieving efficient performance and effectively solves the problem that the existing locking mechanism is difficult to open and adjust.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific implementation methods or related technical descriptions. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of the overall structure of a biliary drainage tube provided in an embodiment of the utility model;

[0023] Figure 2 A schematic diagram of a catheter body provided by an embodiment of the present utility model;

[0024] Figure 3 A schematic diagram of an adjustment and shaping mechanism provided in an embodiment of the present utility model;

[0025] Figure 4 A schematic diagram of a sealing gasket provided in an embodiment of the present utility model.

[0026] icon:

[0027] 100-catheter body; 110-liquid cavity; 120-first threading cavity; 130-second threading cavity; 200-locking traction wire; 300-adjusting shaping mechanism; 310-adjusting handwheel; 320-limiting paddle; 330-supporting elastic member; 400-sealing gasket; 510-first developing ring; 520-second developing ring; 530-locking traction wire return port; 540-liquid inlet and outlet; 600-catheter seat; 700-first fixed axis; 800-second fixed axis. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] 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 require further definition or explanation in subsequent drawings.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, unless separately marked, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0031] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, 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.

[0032] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] In the description of the present invention, the "proximal end" refers to the end of the biliary drainage tube close to the user when in use; the "distal end" refers to the end of the biliary drainage tube away from the user when in use.

[0034] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0035] Example 1

[0036] The existing biliary drainage tube consists of a tube seat, a drainage tube body and a locking system. The locking mechanism of the existing locking system is relatively sharp, and the locking wire is easy to break during operation. In addition, the locking mechanism is mostly snap-on or concave-convex fitting, which is not easy to open and close after locking. It is easy to be damaged after multiple switches, affecting the surgical effect and increasing the difficulty of surgery for medical staff. After locking, the locking wire is easy to loosen or slip, causing the pigtail tip to deform, resulting in complications such as catheter displacement and slippage. The inlet and outlet of the locking wire of the locking system are the same as the inlet and outlet of the solution chamber, and are often accompanied by air leakage and liquid leakage. External bacteria can easily invade and cause secondary infection.

[0037] In view of this, an embodiment of the present invention provides a biliary drainage tube, comprising: a catheter body 100, a locking traction wire 200 and an adjusting and shaping mechanism 300. The catheter body 100 includes a liquid cavity 110 and a first threading cavity 120 and a second threading cavity 130 located on both sides of the liquid cavity 110. The locking traction wire 200 passes through the first threading cavity 120 and passes through the second threading cavity 130. One end of the locking traction wire 200 passing through the second threading cavity 130 is connected to the adjusting and shaping mechanism 300. The adjusting and shaping mechanism 300 can tighten or relax the locking traction wire 200. The catheter body 100 has a tip, which can shrink to form a closed loop under the action of the locking traction wire 200.

[0038] The catheter body 100 includes a liquid cavity 110, a first threading cavity 120, and a second threading cavity 130. The locking traction wire 200 is threaded through the first threading cavity 120 and the second threading cavity 130. The three-cavity catheter body 100 can effectively separate the locking traction wire 200 and the liquid cavity 110, so that the middle liquid cavity 110 can smoothly and efficiently administer drugs, and release more space for drug administration or drainage under the same conditions, thereby accelerating the treatment speed and ensuring the drainage effect. At the same time, it effectively solves the problem that the existing locking traction wire 200 is difficult to accurately retract and release when it is set in a large lumen. The locking traction wire 200 and the first threading cavity 120 and the second threading cavity 130 can form a standard full match, effectively alleviating the phenomenon of air and liquid leakage, making it difficult for external bacteria to invade and not causing secondary infection. By adjusting the shaping mechanism 300 to tighten or loosen the locking traction wire 200, the locking traction wire 200 can be easily retracted and released without worrying about the locking traction wire 200 breaking due to jamming. The operator can retract and adjust it at any time according to actual conditions during the operation, which improves the ease of use and reduces the operator's tension during the operation, which is conducive to achieving efficient performance and effectively solves the problem that the existing locking mechanism is difficult to open and adjust.

[0039] See Figure 1 and Figure 2 The catheter body 100 is a three-lumen catheter with a large lumen (i.e., the liquid lumen 110) and two smaller lumens (i.e., the first threading lumen 120 and the second threading lumen 130). The large central lumen allows for the flow of liquid, while the two smaller lumens accommodate the locking traction wire 200. The locking traction wire 200 enters from the proximal end of the first threading lumen 120 and exits from the distal end of the second threading lumen 130, forming a closed loop. When the locking traction wire 200 is tightened, the tip of the catheter body 100 contracts to form a closed loop shaped like a pigtail, thereby achieving a better drainage area.

[0040] In an optional method of this embodiment, the adjustment and shaping mechanism 300 includes an adjustment handwheel 310 and a limiting paddle 320. One end of the locking traction wire 200 passing through the second threading cavity 130 is connected to the adjustment handwheel 310. The adjustment handwheel 310 is provided with a one-way tooth structure along the circumference, and the limiting paddle 320 cooperates with the one-way tooth structure to make the adjustment handwheel 310 rotate in one direction.

[0041] See Figure 3The adjustment handwheel 310 is a circular tube wheel with a central groove and several tiny unidirectional spiral serrations along its circumference. It secures the retractable end of the locking traction wire 200 and allows for winding and unwinding the locking traction wire 200 by rolling and rotating it to complete retraction and extension. The limiting paddle 320 is a wedge-shaped structure that cooperates with the micro-teeth on the outer circumference of the adjustment handwheel 310 to form a one-way locking mechanism, limiting the adjustment handwheel 310 to a single direction. A raised bar is provided at the end of the limiting paddle 320 to facilitate directional movement during operation.

[0042] In an optional manner of this embodiment, the adjusting and shaping mechanism 300 further includes a supporting elastic member 330 , and one end of the supporting elastic member 330 is elastically connected to the limiting paddle 320 .

[0043] Please continue to see Figure 3 The supporting elastic member 330 preferably employs a support spring, preferably a precision spring made of nickel-titanium or stainless steel, to achieve an adjustable support connection between the limit paddle 320 and the adjustment handwheel 310. To deploy the pointed pigtail structure, simply lift the raised bar on the limit paddle 320, compressing the support spring downward to release the one-way lock on the adjustment handwheel 310. Rotating the adjustment handwheel 310 in the opposite direction loosens the locking traction wire 200, and releasing the raised bar restores the original locked state.

[0044] The adjustment shaping mechanism 300 composed of the adjustment hand wheel 310, the limiting paddle 320 and the supporting elastic member 330 is a set of easy-to-operate one-way self-locking wire-retracting and releasing mechanism, which effectively alleviates the problem of locking the retraction wire 200.

[0045] In an optional manner of this embodiment, a sealing gasket 400 is provided at the side hole where the locking traction wire 200 passes through the second threading cavity 130 , and the sealing gasket 400 has a one-way sealing structure.

[0046] See Figure 3 and Figure 4 The sealing gasket 400 has a rabbit-mouth-shaped three-petal structure and is made of silicone. During assembly, the sealing gasket 400 is fixed to the side hole where the catheter body 100 and the locking traction wire 200 cooperate. When the locking traction wire 200 passes through its opening, a conical one-way valve can be formed regardless of whether the wire is pulled or loosened. Therefore, the side hole of the catheter body 100 is always in a closed state during the process of retracting and releasing the wire, which effectively strengthens the seal and eliminates the risk of liquid leakage and air leakage. It is not easy for external bacteria to invade, further reducing the risk of secondary infection.

[0047] In an optional manner of this embodiment, the catheter body 100 is provided with a first developing ring 510, a second developing ring 520 and a locking traction wire return port 530 in sequence from the distal end to the proximal end, and the locking traction wire 200 passes out from the first threading cavity 120 and passes into the second threading cavity 130 from the locking traction wire return port 530.

[0048] See Figure 2 The farthest end of the catheter body 100 is provided with a chamfer, and a first developing ring 510 is provided near the end of the tip bend, and a second developing ring 520 is provided at the starting end of the tip bend. The proximal end of the second developing ring 520 is provided with a locking traction wire return port 530, and the locking traction wire 200 passes through the locking traction wire return port 530 into the second threading cavity 130.

[0049] Furthermore, the catheter body 100 is provided with a plurality of liquid inlet and outlet ports 540 between the first developing ring 510 and the second developing ring 520 , which can fully achieve drainage.

[0050] In an optional method of this embodiment, the locking traction wire 200 is made of nickel-titanium filaments with high strength and good toughness, and has the characteristics of high strength, strong toughness, and not easy to deform. The wire diameter used on the biliary drainage tube of this embodiment is relatively thin, so that it occupies a smaller space in the catheter body 100.

[0051] The highly resilient locking traction wire 200 allows for greater space for drug administration or drainage under the same conditions, accelerating treatment. Its high toughness and resistance to breakage also enhance the product's user experience and reduce operator anxiety during operation. Furthermore, its high toughness and resistance to deformation allow the tip of the catheter body 100 to be quickly straightened and repositioned after relaxation.

[0052] In an optional manner of this embodiment, the biliary drainage tube further includes a catheter seat 600 , which is disposed at one end of the locking traction wire 200 passing through the second threading cavity 130 , and the adjusting and shaping mechanism 300 is installed on the catheter seat 600 .

[0053] See Figure 3 Above the catheter seat 600 is a support frame for fixing other components, which mainly plays a supporting role and connects various components. The limiting paddle 320 is installed on the catheter seat 600 through the first fixed shaft 700, and the adjusting hand wheel 310 is installed on the catheter seat 600 through the second fixed shaft 800.

[0054] Furthermore, one end of the catheter adapter 600 is a Luer connector, and the other end is a docking cavity that cooperates with the catheter body 100. One end of the locking traction wire 200 is bonded to the docking cavity together with the catheter body 100. Through the catheter adapter 600, other components can be effectively connected.

[0055] This embodiment provides a novel adjustable percutaneous biliary drainage tube, which effectively separates the locking traction wire 200 and the liquid cavity 110, so that the middle liquid cavity 110 can smoothly and efficiently administer drugs. By adjusting the shaping mechanism 300 to tighten or loosen the locking traction wire 200, the locking traction wire 200 can be easily retracted and released. By coordinating the locking traction wire 200 with the first threading cavity 120 and the second threading cavity 130, and providing the sealing gasket 400, the phenomenon of air and liquid leakage is alleviated, making it difficult for external bacteria to invade and prevent secondary infection.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A biliary drainage tube, characterized in that: include: A catheter body, a locking traction wire, and an adjustment and shaping mechanism. The catheter body includes a liquid cavity and a first threading cavity and a second threading cavity located on both sides of the liquid cavity. The locking traction wire passes through the first threading cavity and exits from the second threading cavity. One end of the locking traction wire that passes through the second threading cavity is connected to the adjustment and shaping mechanism. The adjustment and shaping mechanism can tighten or loosen the locking traction wire. The catheter body has a tip, and the tip can be contracted to form a closed loop under the action of the locking traction wire; The adjustment and shaping mechanism includes an adjustment handwheel and a limiting paddle. One end of the locking traction wire passing through the second threading cavity is connected to the adjustment handwheel. The adjustment handwheel is provided with a one-way tooth structure along the circumference. The limiting paddle cooperates with the one-way tooth structure to enable the adjustment handwheel to rotate in one direction.

2. The biliary drainage tube according to claim 1, characterized in that: The limiting paddle has a wedge-shaped structure, and a raised paddle is provided at the end of the limiting paddle.

3. The biliary drainage tube according to claim 2, characterized in that: The adjusting and shaping mechanism further includes a supporting elastic member, one end of which is elastically connected to the limiting paddle.

4. The biliary drainage tube according to claim 1, characterized in that: A sealing gasket is provided at the side hole where the locking traction wire passes through the second threading cavity, and the sealing gasket has a one-way sealing structure.

5. The biliary drainage tube according to claim 1, characterized in that: The catheter body is provided with a first developing ring, a second developing ring and a locking traction wire return port in sequence from the distal end to the proximal end. The locking traction wire passes out from the first threading cavity and passes from the locking traction wire return port into the second threading cavity.

6. The biliary drainage tube according to claim 5, characterized in that: The conduit body is provided with a plurality of liquid inlet and outlet ports between the first developing ring and the second developing ring.

7. The biliary drainage tube according to claim 1, characterized in that: The locking traction wire is a nickel-titanium wire.

8. The biliary drainage tube according to any one of claims 1 to 7, characterized in that: It also includes a catheter seat, which is arranged at one end of the locking traction wire passing through the second threading cavity, and the adjustment and shaping mechanism is installed on the catheter seat.

9. The biliary drainage tube according to claim 8, characterized in that: One end of the catheter seat is a Luer connector, and the other end is a docking cavity that cooperates with the catheter body. One end of the locking traction wire is bonded to the docking cavity together with the catheter body.

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