CN116035655A

CN116035655A - Ureter shutoff stone-taking catheter

Info

Publication number: CN116035655A
Application number: CN202211358408.7A
Authority: CN
Inventors: 程国政; 徐陈曦; 刘俊
Original assignee: Shanghai Huikai Medical Technology Co ltd
Current assignee: Shanghai Huikai Medical Technology Co ltd
Priority date: 2022-11-01
Filing date: 2022-11-01
Publication date: 2023-05-02

Abstract

The invention discloses a ureter plugging and stone removing catheter, which comprises a guide wire, wherein an outer tube is sleeved outside the guide wire, the outer end of the outer tube is connected with a stop block, the outer tube is fixedly connected with the rear end of a basket, the basket is sleeved outside the guide wire, the front end of the basket is fixedly connected with the guide wire, the part of the guide wire extending to the outer side of the basket is a guide end head, the guide wire and the outer tube are both provided with annular printing structures, the initial state of the basket is in a first state, the first state is in a spherical shape, the basket and the guide end head are kept in a relatively static state relative to the outer tube, the guide wire pulls the front end of the basket to move towards the rear end, the distance between the two ends of the basket is gradually reduced, the basket is opened into a second state, the second state is in an umbrella shape, the stone removing catheter is inserted into a ureter through an interventional technology to plug the ureter, the stone removing catheter is used for ureter calculus treatment in cooperation with laser lithotripsy, stones and other foreign matters in a urinary system are grabbed and removed, the operation is simple, the basket is not easy to deform, and the gap between the basket and the ureter is small, and stone fragments can be prevented from escaping.

Description

Ureter shutoff stone-taking catheter

Technical Field

The invention relates to the technical field of medical instruments, in particular to a ureter plugging and stone removing catheter.

Background

Ureteral calculus is a common disease of urinary surgery, and the application of ureteroscopy has become an important surgical means for treating ureteral calculus. In order to prevent the problems of upward movement and drifting of stones into the renal pelvis and stone fragment residue, the medical instrument for taking stones by plugging is inserted into the back of the stones, so that the stones are plugged.

The medical devices used for plugging and removing stones in the market at present have a plurality of defects:

the nickel-titanium alloy urinary system stone extraction net (plugging device) produced by 1.Boston Scientific Corporation comprises: the product is a screw thread structure which is opened at the rear of the stone. Because its basket is opened the size fixed, when opening at calculus rear, can not necessarily block up the ureter completely, in the use, the basket of helicitic texture probably produces deformation, leads to calculus piece to shift up.

Occlusion device for cook production: the product is bowl-shaped eccentric design, and the selected memory alloy is too soft, so that the basket is possibly deformed and stone fragments are possibly escaped in the use process.

3. Plugging and stone-taking catheter manufactured by Shanghai Ino Wei Co., ltd.): the product is the blade-shaped structure, and the clearance of plugging device is great after folding, and in the use, the rubble can be through the clearance of plugging device upwards moving.

4. It is reported that some polymer materials are adopted to inject the ureteral calculus to the rear, and are automatically coagulated to achieve the blocking effect, and cold water is used for flushing and dissolving after the calculus breaking is completed, so that the product is expensive and is not suitable for popularization.

In order to solve the technical problems, the invention provides the ureter plugging and stone removing catheter which is simple to operate, the basket is not easy to deform, the gap between the basket and the ureter is small, and stone fragments can be prevented from escaping.

Disclosure of Invention

In order to solve the technical problems, the invention provides a ureter plugging stone-taking catheter which comprises a guide wire, wherein an outer tube is sleeved outside the guide wire, the outer tube is fixedly connected with the rear end of a basket, the basket is sleeved outside the guide wire, the front end of the basket is fixedly connected with the guide wire, the part of the guide wire extending to the outer side of the basket is a guide end head, and the guide wire and the outer tube are both provided with ring printing structures.

Preferably: the initial state of the basket is a first state, the basket is spherical in the first state, and the basket and the guide end head are kept in a relatively static state relative to the outer tube;

the guide wires pull the front end of the basket to move to the rear end, the distance between the two ends of the basket is gradually reduced, the basket is opened to be in a second state, and the basket is umbrella-shaped in the second state.

Preferably: the outer end of the outer tube is provided with a stop block, and the stop block is fixed on the guide wire and used for limiting the sliding range of the outer tube.

Preferably: the outer end of the stop block is provided with a handle, the handle is fixed on the guide wire, and the handle can facilitate the guide wire to slide in the outer tube.

Preferably: the basket is formed by weaving a plurality of strands of silk-like materials or cutting nickel titanium tubes by laser.

Preferably: the ring seal structure on the guide wire is guide wire ring seal, the guide wire ring seal is arranged at equal intervals, and the opening size of the basket is judged according to the guide wire ring seal.

Preferably: the guide wire can be a wire-shaped structure, comprises a metal material or a nonmetal material, and can be round, square, flat, polygonal and tubular.

Preferably: the ring seal structure on the outer tube is outer tube ring seal, and outer tube ring seal equidistant setting judges whether the outer tube is put in place according to outer tube ring seal.

Preferably: the outer tube is PEEK, PI, TPU or TPI material.

Preferably: the end of the guide end is provided with a ball head, an outer coating is arranged outside the guide end, and the outer coating is made of a high polymer material.

The invention has the technical effects and advantages that:

the stone extraction catheter is inserted into a ureter through an interventional technology to plug the ureter, is used for ureter calculus treatment, is matched with laser lithotripsy, is used for capturing and removing calculus and other foreign matters in a urinary system, is simple to operate and low in cost, is not easy to deform, has small gap with the ureter, and can prevent calculus fragments from escaping.

Drawings

Fig. 1 is a schematic diagram of a ureteral occlusion lithotomy catheter according to an embodiment of the present application;

fig. 2 is a schematic structural view of a basket in a ureter plugging and lithotomy catheter in a second state according to an embodiment of the present application;

fig. 3 is a schematic structural view of a guide wire in a ureteral occlusion lithotomy catheter provided in an embodiment of the present application;

fig. 4 is a schematic structural view of a guide tip in a ureteral occlusion lithotomy catheter provided in an embodiment of the present application;

fig. 5 is a schematic structural view of an outer tube in a ureteral occlusion lithotomy catheter according to an embodiment of the present application.

In the figure: 10. a guide wire; 11. conducting silk-screen ring printing; 20. a handle; 30. a stop block; 40. an outer tube; 41. performing outer tube ring printing; 50. a basket; 60. a guide tip; 61. ball head; 62. and (5) an outer coating.

Detailed Description

The invention will be described in further detail with reference to the drawings and the detailed description. The embodiments of the invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Example 1

Referring to fig. 1-2, in this embodiment, a ureteral occlusion stone removing catheter is provided, which comprises a guide wire 10, an outer tube 40 is sleeved outside the guide wire 10, a stop block 30 is provided at the outer end of the outer tube 40, the stop block 30 is fixed on the guide wire 10 for limiting the sliding range of the outer tube, a handle 20 is provided at the outer end of the stop block 30, the handle 20 is fixed on the guide wire 10, the handle 20 is convenient for the guide wire 10 to slide in the outer tube 40, the outer tube 40 is fixedly connected with the rear end of a basket 50, the basket 50 is sleeved outside the guide wire 10, the front end of the basket 50 is fixedly connected with the guide wire 10, the part of the guide wire 10 extending to the outer side of the basket 50 is a guide end 60, the basket 50 is formed by braiding a plurality of wire materials or cutting nickel-titanium tubes by laser when the outer tube 40 is pushed, the guide wire 10 is not slid in the outer tube 40 by using the handle 20 and the stop block 30, the basket 50 and the guide end 60 keep a relatively static state relative to the outer tube 40, the initial state of the basket 50 is a first state, the first state is spherical, the guide wire 10 is pulled, the guide wire 10 moves outwards along the outer tube 40, the stop block 30 and the handle 20, the outer tube 40 is pushed to extrude the basket 50, the distance between the two ends of the basket 50 is gradually reduced, the basket 50 is opened to a second state, the second state is umbrella-shaped, the opening size of the basket 50 can be adjusted according to the diameter of a blocking object, the adjusting range is 7-16mm, when the blocking and stone taking catheter is used for ureteral calculus treatment, the basket 50 can completely block a ureter, is not easy to deform, and stones and other foreign matters in a urinary system are easy to grasp and remove.

Example 2

Referring to fig. 3, in the present embodiment, the guide wire 10 is provided with guide wire ring prints 11, the guide wire ring prints 11 are disposed at equal intervals, and when the guide wire 10 is pulled outwards, the guide wire ring prints 11 extend from the end of the handle 20, and the opening size of the basket 50 is determined according to the guide wire ring prints 11.

The guide wire 10 may be a wire-like structure, including a metallic material or a nonmetallic material, and the shape may be a round, square, flat, polygonal or tubular structure, and the guide wire 10 may be a guide wire with guiding function, including a conventional stainless tube guide wire or a nickel-titanium alloy guide wire.

Referring to fig. 4, an outer tube ring seal 41 is provided on the outer tube 40, the outer tube ring seal 41 is arranged at equal intervals, the outer tube 40 enters the patient ureter, and whether the outer tube 40 is placed in place is judged according to the outer tube ring seal 41.

The outer tube 40 may be made of PEEK (polyetheretherketone), PI (polyimide), TPU (thermoplastic polyurethane) or TPI (thermoplastic polyimide).

Example 3

Referring to fig. 4 to 5, in the present embodiment, the end of the guiding end 60 is configured as a ball head 61, and an outer coating 62 is disposed outside the guiding end 60, and the outer coating 62 is made of a polymer material.

The working principle of the invention is as follows:

the lithotomy catheter is inserted into a ureter through an interventional technology to plug the ureter, is used for ureter calculus treatment, is matched with laser lithotripsy, grabs and removes calculus and other foreign matters in a urinary system, when the outer tube 40 is pushed, the basket 50 and the guide end 60 keep a relatively static state relative to the outer tube 40, the basket 50 is in a first state, the handle 20 and the stop block 30 enable the guide wire 10 to slide in the outer tube 40, whether the outer tube 40 is placed in place is judged according to the outer tube ring seal 41, after the outer tube 40 is in place, the guide wire 10 is pulled, the basket 50 is opened, and is in a second state, the size of the basket 50 is judged according to the guide wire ring seal 11.

It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art and which are included in the embodiments of the present invention without the inventive step, are intended to be within the scope of the present invention. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.

Claims

1. The utility model provides a ureter shutoff stone extraction catheter, includes seal wire (10), its characterized in that, seal wire (10) overcoat is equipped with outer tube (40), the rear end of outer tube (40) fixed connection basket (50), basket (50) cover is established in seal wire (10) outside, the front end fixed connection seal wire (10) of basket (50), the part that seal wire (10) extends to basket (50) outside is guide end (60), seal wire (10) and outer tube (40) all are provided with the ring seal structure.

2. The ureteral occlusion lithotomy catheter as in claim 1, wherein the initial state of the basket (50) is a first state in which the basket (50) is spherical, the basket (50) and the guide tip (60) being held in a relatively stationary state with respect to the outer tube (40);

the guide wire (10) pulls the front end of the basket (50) to move towards the rear end, the distance between the two ends of the basket (50) is gradually reduced, the basket (50) is opened to be in a second state, and the basket (50) is umbrella-shaped in the second state.

3. The ureteral occlusion stone removing catheter according to claim 1, characterized in that a stopper (30) is provided at the outer end of the outer tube (40), the stopper (30) being fixed to the guide wire (10) for limiting the sliding range of the outer tube (40).

4. A ureteral occlusion lithotomy catheter as in claim 3, wherein the stop 30 has a handle 20 at the outer end, the handle 20 being secured to the guide wire 10, the handle 20 facilitating sliding of the guide wire 10 within the outer tube 40.

5. A ureteral occlusion lithotomy catheter as in claim 2, wherein the basket (50) is braided from a multi-strand wire material or laser cut from a nickel titanium tube.

6. The ureter plugging and lithotomy catheter as in claim 4, wherein the loop-printed structure on the guide wire (10) is a guide wire loop-printed structure (11), the guide wire loop-printed structures (11) are arranged at equal intervals, and the opening size of the basket (50) is judged according to the guide wire loop-printed structures (11).

7. The ureteral occlusion lithotomy catheter as in claim 6, wherein the guide wire (10) is a wire-like structure comprising a metallic or non-metallic material, and is shaped as a circle, square, flat, polygon, or tubular structure.

8. The ureter plugging and lithotomy catheter as in claim 1, wherein the annular seal structure on the outer tube (40) is an outer tube annular seal (41), the outer tube annular seal (41) is arranged at equal intervals, and whether the outer tube (40) is placed in place is judged according to the outer tube annular seal (41).

9. The ureteral occlusion lithotomy catheter as in claim 8, wherein the outer tube (40) is PEEK, PI, TPU or TPI.

10. The ureteral occlusion stone removing catheter according to claim 1, characterized in that the end of the guiding tip (60) is provided with a ball head (61), and an outer coating (62) is preferably arranged outside the guiding tip (60), and the outer coating (62) is made of a polymer material.