Pressure injection balloon catheter for taking out calculus in common bile duct

Abstract

The utility model relates to the technical field of medical instruments, in particular to a pressure injection balloon catheter used for taking out bile duct calculi. Comprising a catheter, a biliary tract balloon is arranged on the lower portion of the catheter, an air pressure hole is formed in the end of the catheter, spraying holes are evenly formed in the circumferential direction of the catheter above the air pressure hole, a switch valve is arranged on the catheter above the spraying holes, a control line of the switch valve is fixed to the inner wall of the catheter, and liquid flow holes are symmetrically formed in the two sides of the catheter above the switch valve. A filling tube is arranged on one side of the catheter, and the bottom of the filling tube is connected into the biliary tract balloon. According to the biliary tract stenosis and biliary tract calculus combined treatment device, the switch valve is adopted, so that the biliary tract stenosis or biliary tract calculus can be independently treated, and the biliary tract stenosis and biliary tract calculus combined treatment can be realized

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a balloon catheter for removing bile duct stones. Background Art

[0002] Balloon dilatation is a common interventional treatment in clinical practice. Usually, a balloon is placed in the narrow part of the human blood vessels or lumen, and then the balloon is inflated or expanded with contrast agent, so that the stenotic lesion can reach the predetermined width, thereby restoring blood supply or normal physiological channels to achieve the effect of improving and relieving the condition. Balloon dilatation is usually used to treat coronary artery stenosis, gastrointestinal stenosis, bile duct stenosis, bronchial stenosis, etc.

[0003] Removal of bile duct stones: After percutaneous and transhepatic puncture of the common bile duct, a guide wire is inserted, which enters the duodenum through the opening of the common bile duct at the duodenal papilla. In this way, a channel is established with the guide wire as the route. The balloon catheter is inserted along the guide wire and then the guide wire is withdrawn. The balloon is inflated through the catheter. After the filled balloon expands the narrow common bile duct, it pushes the stones in the common bile duct from top to bottom, allowing them to enter the duodenum through the expanded narrow section and be discharged from the body with intestinal peristalsis.

[0004] However, existing balloon catheters The surface of the balloon is smooth and soft, and the stones are prone to slipping when being pushed. The stones are prone to move in the opposite direction from the balloon, which results in failure in pushing. Currently, the balloon catheters on the market can only dilate and treat bile duct strictures. Although there are special bile duct stone removal devices (such as gastroscopes) for bile duct stones, they cannot meet the needs of complex and difficult diseases, that is, they cannot effectively remove the stones in the bile duct. Push to the predetermined site (push to the duodenum to reach to the destination);

[0005] Currently, there is no pressure-jet balloon catheter that can simultaneously dilate bile duct strictures and push away bile duct stones. Summary of the invention

[0006] In order to solve the above problems, the utility model provides a balloon catheter for removing bile duct stones. The balloon of the present invention is designed to be larger than the diameter of the common bile duct by more than 30%, and is used to block the upper end of the common bile duct. The surface of the balloon is in a grid shape, and the grid is covered with hillock-like protrusions to increase friction; the front end of the balloon center catheter is straight or curved and has an opening and multiple side holes. The distal end of the balloon center catheter is connected to a pressure injector. After the lower segment or the lower narrow segment of the common bile duct is expanded, the balloon catheter of this design is inserted into the upper end of the common bile duct to block the retrograde movement of the stones. The pressure injector is used to inject the contrast agent or saline with appropriate pressure in a jet-like manner, and the common bile duct stones and contents are forced to pass through the narrow segment and be discharged into the duodenum, thereby achieving the purpose of stone discharge.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A balloon catheter for removing bile duct stones comprises a catheter, a bile duct balloon is arranged at the lower part of the catheter, an air pressure hole is opened at the end of the catheter, injection holes are evenly arranged in the circumferential direction of the catheter above the air pressure hole, a switch valve is arranged on the catheter above the injection hole, a control line of the switch valve is fixed to the inner wall of the catheter, and liquid flow holes are symmetrically arranged on both sides of the catheter above the switch valve; a filling tube is arranged on one side of the catheter, and the bottom of the filling tube is connected to the bile duct balloon.

[0009] Preferably, grid-like protrusions are provided on the outer surface of the biliary balloon.

[0010] Preferably, the top of the conduit is connected to a pressure ejector.

[0011] Preferably, a filler is delivered into the biliary balloon through a filling tube, and the filler may be water, gas or a diluted contrast agent.

[0012] Preferably, the biliary balloon and the protrusion are made of medical elastic material.

[0013] Preferably, the catheter and the filling tube are arranged in parallel and fixed with a medical adhesive.

[0014] Preferably, the control line is fixed to the inner wall of the catheter using a medical adhesive.

[0015] The advantages of the utility model are:

[0016] The utility model adopts a switch valve, which can realize the separate treatment of bile duct stenosis or bile duct stones, and can also realize the combined treatment of bile duct stenosis and bile duct stones;

[0017] Reduce the damage caused by treatment methods to the patient's bile duct and relieve the patient's psychological burden;

[0018] The treatment method of the present application is gentle, highly safe, simple to manufacture, low in cost, and has scalability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the front view of the utility model;

[0020] Figure 2 It is a bottom view of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the catheter of the utility model;

[0022] Figure 4 It is a usage state diagram of the utility model.

[0023] Figure numerals: 1. catheter, 2. biliary balloon, 3. air pressure hole, 4. injection hole, 5. switch valve, 6. liquid flow hole, 7. filling tube, 8. protrusion. Implementation

[0024] The preferred examples of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred examples described herein are only used to illustrate and explain the present invention, and do not limit the present invention.

[0025] It should be noted that the directions or positional relationships indicated by terms such as “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the state or component 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.

[0026] like Figures 1 to 4 Shown is an implementation manner of the utility model.

[0027] like Figures 1 to 3 The balloon catheter for biliary stones shown in the figure comprises a catheter 1, the top of the catheter 1 is connected to a pressure injector, a biliary balloon 2 is arranged at the bottom of the catheter 1, and a grid-like protrusion 8 is arranged on the outer surface of the biliary balloon 2. During the process of the biliary balloon 2 expanding the biliary stricture, the biliary balloon 2 is prevented from displacement, the treatment position is fixed, the stones are blocked from leaving the treatment range, and the filler is prevented from flowing back and affecting the treatment effect. The biliary balloon 2 and the protrusion 8 are made of medical elastic material and are safe. An air pressure hole 3 is opened at the end of the catheter 1. The air pressure hole 3 sprays liquid under the action of pressure until the stones are discharged into the intestine. Spray holes 4 are evenly arranged in the circumferential direction of the catheter 1 above the air pressure hole 3, and the spray holes 4 face the circumference. Liquid is sprayed outward in the direction to increase the pressure and apply pressure to the stone in all directions. A switch valve 5 is arranged on the catheter 1 above the injection hole 4. The control line of the switch valve 5 is fixed to the inner wall of the catheter 1. The control line and the inner wall of the catheter 1 are fixed with medical adhesive. Liquid flow holes 6 are symmetrically arranged on both sides of the catheter 1 above the switch valve 5; a filling tube 7 is arranged on one side of the catheter 1. The catheter 1 and the filling tube 7 are arranged in parallel and fixed with medical adhesive to prevent the filling tube 7 from moving in the process of entering the bile duct and causing damage to the bile duct. The bottom of the filling tube 7 is connected to the biliary balloon 2. The filling agent is transported in the biliary balloon 2 through the filling tube 7. The filling agent can be water, gas or diluted developer, which is safe and effective.

[0028] like Figure 4 As shown, the device is placed in the bile duct, and the stones in the bile duct are pushed into the intestine by the impact of the filler sprayed by the injection hole 4 and the air pressure hole 3.

[0029] Working principle: When the device is only used to treat bile duct stricture, the switch valve 5 is closed, the bile duct balloon 2 is filled and kept full, the filler is retained above the switch valve 5 through the liquid flow hole 6, the pressure ejector does not apply pressure, and the stricture in the bile duct is expanded. After the treatment is completed, the filler is recovered and the bile duct balloon 2 is deflated;

[0030] When the device is used to treat biliary stones, the biliary balloon 2 is filled and kept full, the filler is filled into the catheter 1 through the liquid flow hole 6, the pressure injector applies pressure, the switch valve 5 is opened, and the filler impacts the stone through the air pressure hole 3 and the injection hole 4.

[0031] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned implementation cases, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pressure jet balloon catheter for removing common bile duct stones, characterized in that: The invention comprises a catheter (1), a biliary balloon (2) is arranged at the lower part of the catheter (1), an air pressure hole (3) is provided at the end of the catheter (1), injection holes (4) are evenly arranged in the circumferential direction of the catheter (1) above the air pressure hole (3), a switch valve (5) is arranged on the catheter (1) above the injection hole (4), a control line of the switch valve (5) is fixed to the inner wall of the catheter (1), and liquid flow holes (6) are symmetrically arranged on both sides of the catheter (1) above the switch valve (5); a filling tube (7) is arranged on one side of the catheter (1), and the bottom of the filling tube (7) is connected to the inside of the biliary balloon (2).

2. A pressure jet balloon catheter for common bile duct stone removal according to claim 1, characterized in that: The outer surface of the biliary balloon (2) is provided with grid-like protrusions (8).

3. The pressure jet balloon catheter for removing common bile duct stones according to claim 1, characterized in that: The top of the catheter (1) is connected to a pressure syringe.

4. A pressure jet balloon catheter for common bile duct stone removal according to claim 1, characterized in that: A filling agent is delivered into the biliary balloon (2) via a filling tube (7), and the filling agent may be water, gas or a diluted contrast agent.

5. The pressure jet balloon catheter for removing common bile duct stones according to claim 1, characterized in that: The bile duct balloon (2) and the protrusion (8) are made of medical elastic material.

6. The pressure jet balloon catheter for removing common bile duct stones according to claim 1, characterized in that: The catheter (1) and the filling tube (7) are arranged in parallel and fixed with a medical adhesive.

7. The pressure jet balloon catheter for removing common bile duct stones according to claim 1, characterized in that: The control line and the inner wall of the catheter (1) are fixed using a medical adhesive.

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