Flexible bendable catheter for fiber choledochoscope

Abstract

The utility model discloses a flexible bendable catheter for a fiber choledochoscope, which relates to the technical field of catheters, and comprises a first catheter body and a second catheter body, the opposite ends of the first catheter body and the second catheter body are provided with gooseneck bending tubes of an integrated structure, the lower end of the second catheter body is fixedly provided with a hose, and the hose is fixedly provided with a flexible pipe. The first pipe body, the second pipe body and the hose are each composed of an inner layer, a steel wire braid layer and an outer layer which are arranged from inside to outside, a mounting pipe is fixedly mounted on the left side of the outer surface of the first pipe body, and an external thread part is arranged on the left side of the outer surface of the mounting pipe. The gooseneck bending tube is arranged, so that the catheter is easy to bend, the inner layer, the steel wire braid layer and the outer layer are arranged, so that the catheter has the advantages of being flexible and bendable, the application range is wide, the steel wire braid layer improves fracture resistance, distortion resistance, compliance and elastic performance of the catheter, pushing force conduction is facilitated, torsion conduction can be improved, and the service life of the catheter is prolonged. The catheter can be bent into any shape, so that the catheter can pass through the biliary tract, and the catheter is flexible to control.

Description

Technical Field

[0001] The utility model relates to the technical field of catheters, and particularly relates to a catheter for a flexible fiber choledochoscope. Background Art

[0002] The fiber choledochoscope is improved on the basis of the fiber gastroscope and bronchoscope. It can not only assist in the diagnosis of certain biliary tract diseases, but also perform effective treatment, and even replace some biliary tract surgeries. It is an essential instrument for biliary tract surgeries, and its indications include common bile duct stones, intrahepatic stones, extrahepatic bile duct obstruction, cholangiocarcinoma, parasites, foreign bodies, and other findings in the biliary tract, such as benign tumors, polyps, stress ulcers, granulomas, etc. Under laparoscopy, it is not easy to operate the choledochoscope. Therefore, there is an urgent need for a flexible catheter that can change the direction of the fiber choledochoscope by arbitrarily bending the catheter and can provide protection for the fiber choledochoscope.

[0003] The following problems exist in the prior art:

[0004] Traditional catheters are made of medical resin. Due to their hard texture, they are not easy to bend, have a narrow scope of application, and cannot reach the affected area directly during use, and are likely to scratch the inner wall of the biliary tract. Traditional catheters are too thick in diameter to enter the biliary tract through the forceps channel of the choledochoscope and cannot cooperate with the stone extraction basket for stone extraction under the choledochoscope, which brings inconvenience to medical staff and patients. Summary of the Utility Model

[0005] The utility model provides a catheter for a flexible fiber choledochoscope to solve the problems raised in the above background art.

[0006] To solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A catheter for a flexible fiber choledochoscope includes a first tube body and a second tube body. An integral gooseneck bending tube is provided at the relative ends of the first tube body and the second tube body. A flexible tube is fixedly installed at the lower end of the second tube body. The first tube body, the second tube body, and the flexible tube are all composed of an inner layer, a wire braided layer, and an outer layer arranged from the inside to the outside. An installation tube is fixedly installed on the left side of the outer surface of the first tube body. An external thread portion is provided on the left side of the outer surface of the installation tube. The outer surface of the external thread portion is threadedly connected to a fiber choledochoscope body. The flexible tube includes an insertion portion. One end of the insertion portion is fixedly installed at the end of the second tube body away from the gooseneck bending tube. The other end of the insertion portion is fixedly installed with a bending portion. The other end of the bending portion is fixedly installed with a tip portion. The other end of the tip portion is fixedly installed with a pointed end portion.

[0008] Preferably, an anti-slip sleeve is fixedly installed on the outer surface of the installation tube, and the material of the anti-slip sleeve is rubber.

[0009] Preferably, the material of the inner layer is polytetrafluoroethylene, and the material of the steel wire braided layer is 304 stainless steel.

[0010] Preferably, the material of the outer layer is mixed nylon or polyester elastomer.

[0011] Preferably, the tip end portion has a conical structure with a gradually decreasing diameter, and the tip end portion is tough and soft in texture.

[0012] Preferably, the outer surface of the tip end portion is coated with a hydrophilic coating, and the end of the hydrophilic coating is provided with a rounded corner.

[0013] Due to the adoption of the above technical solutions, the technical progress achieved by the present utility model compared with the prior art is as follows:

[0014] 1. The present utility model provides a catheter for a flexible fiber choledochoscope. By providing a gooseneck bending tube, the catheter is easy to bend and operate. The arrangement of the inner layer, the steel wire braided layer, and the outer layer endows the catheter with the characteristics of flexibility and bendability, with a wide range of applications. The steel wire braided layer improves the anti-breakage, anti-twist, compliance, and elastic properties of the catheter, helps the conduction of driving force, can improve the torsion conduction, can bend the catheter into any shape, is beneficial to the catheter passing through the biliary tract, and the catheter is flexible to control.

[0015] 2. The present utility model provides a catheter for a flexible fiber choledochoscope. By providing an insertion portion, a bending portion, a distal end portion, and a tip end portion, the catheter is easy to enter the biliary tract and can reach the affected area directly, creating good conditions for smoothly removing stones under the choledochoscope, saving the operation time, effectively reducing the operation burden and the patient's pain. The tip end portion is conically arranged and tough and soft in texture, making the catheter easy to pass through the narrow part of the biliary tract and can be bent in the body. At the same time, the hydrophilic coating and the rounded corner are provided to prevent the catheter from scratching the biliary tract wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural view of the present utility model;

[0017] Figure 2 is a schematic connection view of the installation tube and the fiber choledochoscope body of the present utility model;

[0018] Figure 3 is a schematic cross-sectional structural view of the present utility model;

[0019] Figure 4 is a schematic view of the hose structure of the present utility model;

[0020] Figure 5 is a schematic enlarged structural view of part A of the present utility model;

[0021] Figure 6 is a schematic view of the three-layer structure of the present utility model.

[0022] In the figure: 1. First tube body; 101. Inner layer; 102. Steel wire braided layer; 103. Outer layer; 2. Gooseneck bend tube; 3. Second tube body; 4. Flexible tube; 41. Insertion part; 42. Bend part; 43. Tip part; 44. Sharp tip part; 45. Hydrophilic coating; 46. Rounded chamfer; 5. Installation tube; 6. Fiber choledochoscope body; 7. Anti-slip sleeve; 8. External thread part. Specific embodiments

[0023] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] As Figures 1-6 shown, a catheter for a flexible and bendable fiber choledochoscope includes a first tube body 1 and a second tube body 3. A gooseneck bend tube 2 with an integral structure is provided at the opposite ends of the first tube body 1 and the second tube body 3. A flexible tube 4 is fixedly installed at the lower end of the second tube body 3. The first tube body 1, the second tube body 3, and the flexible tube 4 are all composed of an inner layer 101, a steel wire braided layer 102, and an outer layer 103 arranged from the inside to the outside, making the catheter have the characteristics of being flexible and bendable, and the catheter can be bent into any shape, which is beneficial for the catheter to pass through the bile duct, with a wide range of applications. An installation tube 5 is fixedly installed on the left side of the outer surface of the first tube body 1. An external thread part 8 is provided on the left side of the outer surface of the installation tube 5. The outer surface of the external thread part 8 is threadedly connected to a fiber choledochoscope body 6. The flexible tube 4 includes an insertion part 41. One end of the insertion part 41 is fixedly installed with the end of the second tube body 3 away from the gooseneck bend tube 2. The other end of the insertion part 41 is fixedly installed with a bend part 42. The other end of the bend part 42 is fixedly installed with a tip part 43. The other end of the tip part 43 is fixedly installed with a sharp tip part 44, making the catheter easy to pass through the narrow part of the bile duct and easy to enter the bile duct, and can reach the affected area directly.

[0025] The fiber choledochoscope body 6 is composed of a fiber choledochoscope body and a cold light source, and is usually equipped with a variety of accessories, mainly including a stone extraction net, a biopsy forceps, a cytology brush, a flushing catheter, a camera, a television video observation system, etc. The fiber choledochoscope body is composed of two parts, a hard part and a soft part. The hard part includes an eyepiece and a direction control button. The eyepiece can freely adjust the focal length, and the control button below the eyepiece can adjust and control the angle and direction of the bendable part at the front end of the soft part. The soft part is mainly a light guiding system, and the soft part is composed of 2 light source beam holes, 1 objective lens, and 1 - 2 lumen channels.

[0026] During use, the external thread portion 8 on the installation tube 5 is threadedly connected to the fiber choledochoscope body 6, and then the catheter is inserted into the biliary tract for stone extraction. The insertion portion 41, bending portion 42, distal end portion 43, and tip end portion 44 are provided, making it easy for the catheter to pass through the narrow part of the biliary tract and enter the biliary tract, enabling it to reach the affected area directly, creating good conditions for smooth stone extraction under the choledochoscope, saving the operation time, effectively reducing the operation burden and the patient's pain. The gooseneck bending tube 2 is provided to make the catheter easy to bend and operate. The inner layer 101, wire braid layer 102, and outer layer 103 are provided to make the catheter soft and bendable, and the catheter can be bent into any shape, which is beneficial for the catheter to pass through the biliary tract, and has a wide range of applications.

[0027] As Figure 1 , Figure 2 shown, an anti-slip sleeve 7 is fixedly installed on the outer surface of the installation tube 5, and the material of the anti-slip sleeve 7 is rubber.

[0028] During the connection process between the catheter and the fiber choledochoscope body 6, the anti-slip sleeve 7 can play an anti-slip effect, making the installation of the tube body 1 more flexible.

[0029] As Figure 6 shown, the material of the inner layer 101 is polytetrafluoroethylene, the material of the wire braid layer 102 is 304 stainless steel, and the material of the outer layer 103 is mixed nylon or polyester elastomer.

[0030] By providing the gooseneck bending tube 2, the catheter is easy to bend and operate. By providing the inner layer 101, wire braid layer 102, and outer layer 103, the catheter has the characteristics of being soft and bendable, can improve torque conduction, has a wide range of applications. The wire braid layer 102 improves the anti-breakage, anti-twist, compliance, and elastic properties of the catheter, helps the transmission of driving force, the catheter can be bent into any shape, which is beneficial for the catheter to pass through the biliary tract, and the catheter is flexible to operate.

[0031] As Figures 3-5 shown, the tip end portion 44 has a conical structure and its diameter gradually decreases, and the tip end portion 44 is tough and soft in texture.

[0032] The tip end portion 44 is conically arranged and tough and soft in texture, making it easy for the catheter to pass through the narrow part of the biliary tract and can be bent in the body.

[0033] As Figures 3-5 shown, a hydrophilic coating 45 is coated on the outer surface of the tip end portion 44, and the end of the hydrophilic coating 45 is provided with a rounded corner 46.

[0034] The hydrophilic coating 45 and the rounded corner 46 are provided to prevent the catheter from scratching the biliary tract wall.

[0035] Working principle of the present invention: When in use, hold the anti-slip sleeve 7 to thread-connect the external thread portion 8 on the installation pipe 5 with the fiber choledochoscope body 6, and then insert the catheter into the biliary tract for stone extraction operation. The insertion portion 41, bending portion 42, tip portion 43, and sharp tip portion 44 are provided, making it easy for the catheter to enter the biliary tract and reach the affected area directly, creating good conditions for smooth stone extraction under the choledochoscope, saving the operation time, effectively reducing the operation burden and the patient's pain. The gooseneck bending pipe 2 is provided to make the catheter easy to bend and operate. The inner layer 101, wire braided layer 102, and outer layer 103 are provided to make the catheter have the characteristics of being soft and bendable, and the catheter can be bent into any shape, which is beneficial for the catheter to pass through the biliary tract, improving the torque transmission, and having a wide range of applications. The sharp tip portion 44 is conically arranged and has a tough and soft texture, making it easy for the catheter to pass through the narrow part of the biliary tract and can be bent in the body. At the same time, a hydrophilic coating 45 and a rounded corner 46 are provided to prevent the catheter from scratching the biliary tract wall.

[0036] The above has generally described the present utility model in detail, but based on the present utility model, some modifications or improvements can be made, which are obvious to those of ordinary skill in the technical field. Therefore, modifications or improvements made without departing from the spirit of the present utility model are within the protection scope of the present utility model.

Claims

1. A flexible and bendable fiber choledochoscope catheter, comprising a tube body 1 (1) and a tube body 2 (3), characterized in that: The opposite ends of the tube body 1 (1) and the tube body 2 (3) are provided with an integral gooseneck bending tube (2); the lower end of the tube body 2 (3) is fixedly provided with a hose (4); the tube body 1 (1), the tube body 2 (3) and the hose (4) are all composed of an inner layer (101), a steel wire braided layer (102) and an outer layer (103) arranged from the inside to the outside; a mounting tube (5) is fixedly provided on the left side of the outer surface of the tube body 1 (1); and the outer surface of the mounting tube (5) is provided with an external threaded portion on the left side. (8), the outer surface of the external threaded portion (8) is threadedly connected to a fiber choledochoscope body (6), the hose (4) comprises an insertion portion (41), one end of the insertion portion (41) is fixedly mounted to an end of the tube body (3) away from the gooseneck bending tube (2), the other end of the insertion portion (41) is fixedly mounted with a bending portion (42), the other end of the bending portion (42) is fixedly mounted with a tip portion (43), and the other end of the tip portion (43) is fixedly mounted with a tip portion (44).

2. A soft and bendable fiber choledochoscope catheter according to claim 1, characterized in that: An anti-slip sleeve (7) is fixedly mounted on the outer surface of the mounting tube (5), and the material of the anti-slip sleeve (7) is rubber.

3. The soft and bendable fiber choledochoscope catheter according to claim 1, characterized in that: The material of the inner layer (101) is polytetrafluoroethylene, and the material of the steel wire braided layer (102) is 304 stainless steel.

4. The soft and bendable fiber choledochoscope catheter according to claim 1, characterized in that: The material of the outer layer (103) is mixed nylon or polyester elastomer.

5. The soft and bendable fiber choledochoscope catheter according to claim 1, characterized in that: The tip portion (44) is in a conical structure with a gradually decreasing diameter, and the tip portion (44) is tough and soft.

6. The soft and bendable fiber choledochoscope catheter according to claim 1, characterized in that: The outer surface of the tip portion (44) is coated with a hydrophilic coating (45), and the end of the hydrophilic coating (45) is arranged with a rounded corner (46).

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