Bendable zebra guide wire

Abstract

The utility model provides a bendable zebra guide wire which is composed of a core wire, a wrapping layer and a hydrophilic coating, the core wire is a metal wire, the wrapping layer wraps the core wire, and the hydrophilic coating is coated on the outer surface of the wrapping layer. The zebra guide wire is divided into an insertion part and an operation part which are connected with each other, the core wire is composed of a first core wire body in the insertion part and a second core wire body in the operation part, the first core wire body is spiral, the middle section of the first core wire body is a long spiral line, and the two ends of the first core wire body are short spiral lines; the second core wire is in a long strip shape. The insertion part can be bent into a return guide wire when encountering resistance, so that the guide wire can enter a thicker bile duct or pancreatic duct more easily and is prevented from entering a branch bile duct or pancreatic duct, and the probability that the guide wire is perforated is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a bendable zebra guidewire. Background Art

[0002] Choledochoscopes and duodenoscopes are routinely used to treat biliary and pancreatic diseases such as gallstones, bile duct strictures, and obstructive jaundice. Guidewires are commonly used in choledochoscopes and duodenoscopes, allowing rapid access through the duodenal papilla into the common bile duct or pancreatic duct. Other endoscopic consumables, such as angiographic catheters, sphincterotomies, papillary dilation balloons, and bile and pancreatic stents, must be placed under the guidance of a guidewire to ensure proper function.

[0003] Currently, commonly used guidewires are divided into two types based on their outer diameter: 0.035 inches and 0.025 inches. Based on the shape of the guidewire insertion portion, they can be divided into straight guidewires and curved guidewires. With the assistance of a papillotomy, the guidewire can enter the intrahepatic bile duct or dorsal pancreatic duct. Due to the large number of branches in the intrahepatic bile duct, there is an accessory pancreatic duct at the junction of the ventral and dorsal pancreatic ducts. Due to the curvature of the common bile duct and ventral pancreatic duct, a straight guidewire is more likely to enter the right intrahepatic bile duct or accessory pancreatic duct. It is difficult to enter the left hepatic duct with a guidewire, and entering the dorsal pancreatic duct is even more difficult. This has led to failures in stone removal and catheterization in the left or dorsal hepatic duct. A curved guidewire can change the direction of the guidewire tip, requiring an assistant to rotate the guidewire. Due to the long guidewire, precise positioning is difficult during guidewire rotation, resulting in failure in cannulation of the left or dorsal pancreatic duct.

[0004] Furthermore, during duodenal papilla intubation with a guidewire, if the bile or pancreatic fluid outflow tract within the duodenal papilla bends or turns, the guidewire will encounter significant resistance through the papilla. If the guidewire encounters resistance, continued forceful insertion could cause it to penetrate the liver parenchyma, pancreatic duct, or duodenal papilla into the retroperitoneum or abdominal cavity, leading to a serious complication such as perforation. Straight guidewires are more likely to experience perforation than curved guidewires. Utility Model Content

[0005] In order to solve the above-mentioned technical problems, a bendable zebra guidewire is provided. The technical means adopted by the present invention are as follows:

[0006] A flexible zebra guidewire consists of a core wire, a wrapping layer and a hydrophilic coating, wherein the core wire is a metal wire, the wrapping layer is wrapped around the outside of the core wire, and the hydrophilic coating is coated on the outer surface of the wrapping layer; the zebra guidewire is divided into an insertion part and an operating part that are connected, and the core wire consists of a first core wire in the insertion part and a second core wire in the operating part, the first core wire is spiral-shaped, the middle section of the first core wire is a long spiral wire, and the two ends of the first core wire are short spiral wires; the second core wire is in the shape of a long strip.

[0007] Furthermore, the insertion portion is linear or arc-shaped.

[0008] Furthermore, the outer diameters of the insertion portion and the operating portion are the same.

[0009] Furthermore, the wrapping layer of the insertion part is made of soft material.

[0010] Furthermore, the wrapping layer of the operating portion is made of polyethylene.

[0011] Furthermore, the outer surface of the wrapping layer of the operating portion is provided with spiral zebra stripes.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1. The core wire of the insertion portion of the present invention has different hardness and torsion, and can bend when encountering resistance. The curved soft insertion portion is easier to enter the left hepatic duct or the dorsal pancreatic duct, while reducing the incidence of perforation, a complication.

[0014] 2. The insertion portion of the present invention can be bent into a guide wire when encountering resistance, making it easier to enter a thicker bile duct or pancreatic duct, avoiding entering a branch bile duct or pancreatic duct, and reducing the probability of guide wire perforation.

[0015] Based on the above reasons, the present invention can be widely promoted in the fields of medical treatment and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 It is a structural diagram of the present utility model.

[0018] Figure 2 This is a partial enlarged view of the first core wire of the utility model.

[0019] Figure 3 This is a schematic diagram of the bending of the insertion portion of the utility model.

[0020] Figure 4 Schematic diagram of the dorsal pancreatic duct, accessory pancreatic duct, and ventral pancreatic duct.

[0021] Figure 5 This is a schematic diagram showing how the straight guidewire cannula of the present invention can more easily pass through the ventral pancreatic duct and enter the accessory pancreatic duct.

[0022] Figure 6 This is a schematic diagram showing how the curved guidewire cannula of the present invention can more easily pass through the ventral pancreatic duct and enter the accessory pancreatic duct.

[0023] In the figure: 1, wrapping layer; 2, insertion part; 3, operation part; 4, first core wire; 5, second core wire. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] The utility model provides a bendable zebra guidewire, which consists of a core wire, a wrapping layer 1 and a hydrophilic coating. The wrapping layer 1 is wrapped around the outside of the core wire, and the hydrophilic coating is coated on the outer surface of the wrapping layer 1.

[0026] The flexible zebra guidewire is divided into an insertion portion 2 and an operation portion 3 , and the core wire consists of a first core wire 4 in the insertion portion 2 and a second core wire 5 in the operation portion 3 .

[0027] The insertion part 2 is straight or arc-shaped. The first core wire in the insertion part 2 is a metal wire. The metal wire is spiral. The middle section of the metal wire is a long spiral line and the two ends are short spiral lines. The wrapping layer of the insertion part 2 is a soft material (existing material).

[0028] The second core wire in the operating part 3 is a metal wire in a long strip shape. The wrapping layer of the operating part 3 is made of polyethylene or other materials (existing materials). The outer surface of the wrapping layer of the operating part 3 is provided with spiral zebra stripes.

[0029] The insertion portion 2 and the operation portion 3 have the same outer diameter.

[0030] The insertion portion of the utility model can be bent into a return guide wire when encountering resistance, making it easier to enter a thicker bile duct or pancreatic duct, avoiding entering a branch bile duct or pancreatic duct, and reducing the probability of guide wire perforation.

[0031] Duodenoscope-assisted sphincterotomy with a guidewire for passage into the main pancreatic duct: The duodenoscope is positioned in the descending duodenum, and the duodenal papilla is identified. The sphincterotomy with a guidewire is inserted through the duodenoscope's forceps channel into the duodenal lumen. The sphincterotomy's placement, axis, and curvature are adjusted at the opening of the duodenal papilla to secure the sphincterotomy. A guidewire is inserted into the sphincterotomy channel, and the guidewire's insertion portion is guided through the sphincterotomy channel and passed through the papillary sphincter into the ventral pancreatic duct. The guidewire follows the curvature of the ventral pancreatic duct and enters the accessory pancreatic duct. As the guidewire is further advanced, the guidewire tip encounters obstruction from the accessory papilla, causing the guidewire insertion portion to bend. The curved guidewire is pulled back until the bend enters the ventral pancreatic duct. Further advancement of the guidewire into the pancreatic duct makes the curved insertion portion more accessible. After the guidewire enters the dorsal pancreatic duct, operations such as stone removal and pancreatic duct stent placement can be completed under the guidance of the guidewire.

[0032] 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 flexible zebra guidewire, characterized in that: The invention is composed of a core wire, a wrapping layer (1) and a hydrophilic coating, wherein the core wire is a metal wire, the wrapping layer (1) is wrapped around the outside of the core wire, and the hydrophilic coating is coated on the outer surface of the wrapping layer (1); the zebra guide wire is divided into an insertion part (2) and an operation part (3) connected to each other, and the core wire is composed of a first core wire (4) in the insertion part (2) and a second core wire (5) in the operation part (3); the first core wire (4) is spiral-shaped, the middle section of the first core wire (4) is a long spiral line, and the two ends of the first core wire (4) are short spiral lines; the second core wire (5) is in the shape of a long strip.

2. The bendable zebra guidewire according to claim 1, characterized in that: The insertion portion (2) is in a straight line or an arc shape.

3. The bendable zebra guidewire according to claim 1, characterized in that: The outer diameters of the insertion portion (2) and the operating portion (3) are the same.

4. The bendable zebra guidewire according to claim 1, characterized in that: The wrapping layer of the inserting part (2) is made of soft material.

5. The bendable zebra guidewire according to claim 1, characterized in that: The wrapping layer of the operating part (3) is made of polyethylene.

6. The bendable zebra guidewire according to claim 1, characterized in that: The outer surface of the wrapping layer of the operating portion (3) is provided with spiral zebra stripes.

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