Guide wire-passing flushing calculus-removing mesh basket catheter
By introducing a combination of the flushing channel and the guide wire channel into the meshing basket catheter, and using the flushing liquid and guide wire guidance, the difficulty of the meshing basket catheter in the biliary tract is solved, and the success rate of stone extraction and placement accuracy is improved.
Patent Information
- Application Number
- CN202420421873.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-05
- Publication Date
- 2024-12-06
- Estimated Expiration
- 2034-03-05
AI Technical Summary
The existing net basket catheter is difficult to hold the stone during cholangiogram, and the net basket is limited when placed in the common bile duct under the guidance of the guidewire, which increases the difficulty and risk of stone removal.
A guide wire rinsing stone mesh basket catheter is designed, which includes a stone mesh basket and an outer sheath tube. Through the combination of the rinsing channel and the guide wire, the rinsing liquid and the guide wire guide guide can be used to guide the basket catheter into the common bile duct and promote stones. Enter the net basket.
It effectively improves the success rate of stone embedding in the bile duct of the net basket catheter, reduces the risk of stone residue and integration, and simplifies the stone extraction process.
Smart Images
Figure CN222110115U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a guidewire flushing stone removal net basket catheter. Background Art
[0002] Common bile duct stones are a common and frequently occurring disease in my country. Stones blocking the cystic duct or bile duct can induce complications such as acute cholecystitis, acute cholangitis, obstructive jaundice, and acute biliary pancreatitis, with symptoms such as chills, fever, abdominal pain, and jaundice. In severe cases, it can even lead to shock. Endoscopic retrograde cholangiopancreatography (ERCP) is the preferred method for treating common bile duct stones, with the advantages of less trauma and faster recovery.
[0003] The basket catheter and balloon catheter are commonly used instruments for ERCP lithotripsy. The basket catheter can remove larger stones, while the balloon catheter is mainly used to remove smaller stones. The following problems exist in the process of lithotripsy using the basket catheter: 1. In order to observe the location of the stone and whether the basket has covered the stone, it is often necessary to inject contrast agent through the basket catheter. During cholangiography, under the action of contrast agents, stones in the common bile duct often enter the intrahepatic bile duct along with the contrast agents, which is not conducive to stone removal by basket and may even lead to residual stones; 2. In order to ensure the strength of stone removal, the basket catheter is generally larger than 7Fr to accommodate the basket wire and connecting rod. When the gap between the stone and the bile duct wall is small, the stone may be pushed into the intrahepatic bile duct during the insertion of the basket catheter, and even cause stone incarceration, increase the difficulty of stone removal, and even lead to stone removal failure; 3. It is slightly more difficult to insert the stone removal basket catheter into the common bile duct without the guidance of a guidewire, while the stone removal basket guided by a guidewire is easier to insert into the common bile duct or even the intrahepatic bile duct for stone removal. At present, the guidewire guide head is located at the head end of the basket catheter wire. Under the constraint of the guidewire, the basket can only move backward along the guidewire, which is not conducive to stone removal by basket. Utility Model Content
[0004] In view of the above technical problems, a guide wire flushing stone removal basket catheter is provided. The technical means adopted by the utility model are as follows:
[0005] A guidewire flushing stone removal basket catheter comprises: a stone removal basket and an outer sheath tube, the stone removal basket comprises a cap, a metal wire, a connecting rod and a push rod, the metal wires are provided in a cluster; the cap is connected to the head ends of the metal wires, and the tail ends of the metal wires are connected to the push rod through the connecting rod;
[0006] The outer sheath tube comprises a first tube section and a second tube section, the tail side of the second tube section is connected to the front side of the first tube section, the first tube section is a double-channel tube, a net basket channel and a first flushing channel are arranged therein, and the stone removal net basket is placed in the net basket channel; the second tube section is a single-channel tube, a second flushing channel is arranged therein;
[0007] The outside of the pipe wall of the first pipe section is connected with a flushing joint, and the inside of the flushing joint is provided with a third flushing channel;
[0008] The third flushing channel, the first flushing channel and the second flushing channel are connected in sequence to form a guidewire channel, and the guidewire channel is used for inserting a guidewire and injecting a flushing solution.
[0009] Furthermore, at least one side hole is provided on the front end tube wall of the second flushing channel.
[0010] Furthermore, the head end of the guide wire channel is in a frustum shape.
[0011] Furthermore, the upper end of the cap is in a frustum shape.
[0012] Furthermore, a handle is provided at the tail of the outer sheath tube, and a basket ring is provided on the handle.
[0013] Furthermore, the outer diameter of the first tube section of the outer sheath tube is 5Fr, and the length is 3-5cm.
[0014] Furthermore, the outer diameter of the outer sheath is 7-8Fr.
[0015] Furthermore, the length of the stone removal basket is 3-5 cm, and the maximum diameter after release is 1-2 cm.
[0016] Furthermore, the catheter is made of polyethylene.
[0017] Compared with the prior art, the utility model has the following advantages:
[0018] 1. The utility model is provided with a flushing tube, which helps the stones at the front end of the basket catheter to enter the basket during cholangiography and flushing.
[0019] 2. The flushing tube in the utility model can accommodate a guide wire, and under the guidance of the guide wire, the basket catheter can be inserted into the common bile duct and the intrahepatic bile duct without affecting the movement of the basket.
[0020] Based on the above reasons, the utility model can be widely promoted in the fields of medical treatment and the like. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0022] Figure 1 It is a structural schematic diagram of the utility model.
[0023] Figure 2 It is a structural schematic diagram of the utility model for inserting a guide wire.
[0024] Figure 3 It is a schematic diagram of the structure of the stone-removing net basket after being released.
[0025] In the figure: 11, cap; 12, metal wire; 13, push rod; 21, first pipe section; 22, second pipe section; 23, basket channel; 24, first flushing channel; 25, second flushing channel; 26, flushing connector; 27, third flushing channel; 28, side hole; 29, handle. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] like Figure 1-3 As shown, the utility model provides a basket catheter for flushing and removing stones through a guide wire, which relates to a basket catheter.
[0028] The utility model discloses a stone-removing net basket catheter for flushing through a guide wire, which comprises a stone-removing net basket and an outer sheath tube.
[0029] The stone-taking net basket is composed of a cap 11, a metal wire 12, a connecting rod and a push rod 13. The metal wires are provided in a cluster. The cap is connected to the head ends of the metal wires, and the tail ends of the metal wires are connected to the push rod through the connecting rod. The upper end of the cap is truncated.
[0030] The outer sheath tube includes a first tube section 21 and a second tube section 22, and the tail side of the second tube section is connected to the front side of the first tube section. The first tube section is a double-channel tube, which is provided with a basket channel 23 and a first flushing channel 24, and the stone-removing basket is placed in the basket channel. Before use, the metal wire of the stone-removing basket is retracted in the basket channel. When in use, the metal wire of the stone-removing basket is pushed out of the basket channel and released by pushing the push rod.
[0031] The second pipe section is a single-channel pipe, and a second flushing channel 25 is arranged therein.
[0032] A flushing joint 26 is connected to the outside of the pipe wall of the first pipe section, and a third flushing channel 27 is provided inside the flushing joint.
[0033] The third flushing channel, the first flushing channel and the second flushing channel are connected in sequence to form a guidewire channel, and the guidewire channel is used to insert a guidewire and inject a flushing liquid. The first pipe section, the second pipe section and the flushing connector can form a flushing tube.
[0034] One or more side holes 28 are formed on the front end wall of the outer sheath tube corresponding to the second flushing channel.
[0035] The sheath tube head end corresponding to the guide wire channel is in a frustum shape.
[0036] The tail of the outer sheath tube is provided with a handle 29, and the handle is provided with a basket ring.
[0037] The utility model can be used for endoscopic stone removal. A guide wire is inserted through a flushing channel and inserted into the common bile duct under the guidance of the guide wire. By injecting flushing fluid, the stone at the front end of the catheter can be promoted to enter the net basket.
[0038] In this embodiment, the outer diameter of the first tube section of the outer sheath tube is 5Fr, and the length is 3-5cm.
[0039] In this embodiment, the outer diameter of the outer sheath is 7-8 Fr.
[0040] In this embodiment, the length of the stone removal basket is 3-5 cm, and the maximum diameter after release is 1-2 cm.
[0041] In this embodiment, the material of the catheter is polyethylene.
[0042] The method of the utility model:
[0043] After the duodenoscope was inserted orally and the bile duct was cannulated successfully, endoscopic retrograde cholangiography was performed first to determine the number, location and size of the stones, and then a small sphincter incision was made, and a cylindrical balloon with a diameter of 1.0 cm was used to dilate the duodenal papilla.
[0044] Under the guidance of the guide wire, the stone-taking basket of the utility model is inserted into the common bile duct through the duodenal papilla, and contrast agent is injected through the flushing joint to flush the intrahepatic bile duct stones under the stone-taking basket, and then the stone-taking basket is released and the stones in the common bile duct are directly dragged into the duodenum. Alternatively, the stone-taking basket is released first, and flushing fluid is injected to promote the stones to enter the stone-taking basket.
[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A guidewire flushing stone removal basket catheter, characterized in that: include: A stone retrieval basket and an outer sheath tube, wherein the stone retrieval basket comprises a cap (11), a metal wire (12), a connecting rod and a push rod (13), wherein the metal wire (12) is provided with a plurality of metal wires arranged in a cluster; the cap (11) is connected to the head ends of the plurality of metal wires (12), and the tail ends of the plurality of metal wires (12) are connected to the push rod (13) via the connecting rod; The outer sheath tube comprises a first tube section (21) and a second tube section (22); the tail side of the second tube section (22) is connected to the front side of the first tube section (21); the first tube section (21) is a double-channel tube, and is provided with a net basket channel (23) and a first flushing channel (24); the stone removal net basket is placed in the net basket channel (23); the second tube section (22) is a single-channel tube, and is provided with a second flushing channel (25); The outside of the pipe wall of the first pipe section (21) is connected to a flushing joint (26), and the inside of the flushing joint (26) is provided with a third flushing channel (27); The third flushing channel (27), the first flushing channel (24) and the second flushing channel (25) are connected in sequence to form a guidewire channel, and the guidewire channel is used for inserting a guidewire and injecting a flushing liquid.
2. The over-the-guidewire flushing stone removal basket catheter according to claim 1, characterized in that: At least one side hole (28) is provided on the front end tube wall of the second flushing channel (25).
3. The over-the-guidewire flushing stone removal basket catheter according to claim 1, characterized in that: The head end of the guide wire channel is in a frustum shape.
4. The over-the-guidewire flushing stone removal basket catheter according to claim 1, characterized in that: The upper end of the cap (11) is in a truncated cone shape.
5. The over-the-guidewire flushing stone removal basket catheter according to claim 1, characterized in that: The tail of the outer sheath tube is provided with a handle (29), and the handle (29) is provided with a basket ring.
6. The over-the-guidewire irrigation stone removal basket catheter according to claim 1, characterized in that: The first tube section (21) of the outer sheath tube has an outer diameter of 5Fr and a length of 3-5cm.
7. The over-the-guidewire flushing stone removal basket catheter according to claim 1, characterized in that: The outer diameter of the outer sheath is 7-8Fr.
8. The over-the-guidewire flushing stone removal basket catheter according to claim 1, characterized in that: The length of the stone removal basket is 3-5 cm, and the maximum diameter after release is 1-2 cm.
9. The over-the-guidewire irrigation stone removal basket catheter according to claim 1, characterized in that: The material of the catheter is polyethylene.