Developing indicating catheter

Abstract

The utility model discloses a developing indicating catheter which comprises an inner tube, a metal middle tube is sleeved on the outer side of the inner tube, an outer tube is sleeved on the outer side of the metal middle tube, eight developing lines are arranged in the outer tube along the axis direction of the outer tube, and the developing lines are uniformly distributed along the circumferential direction of the outer tube. And the length direction of the developing line is parallel to the axis direction of the outer-layer pipe. According to the utility model, the developing line is embedded into the outer-layer tube and is used for displaying the position of the catheter under the irradiation of X rays, so that compared with a traditional catheter in which developing metal is directly fixed at the front end of the catheter, a developing ring can be prevented from being in contact with a blood vessel, and the risk that the blood vessel is poked is avoided; according to the scheme, the developing line is embedded into the outer-layer tube, the material structure in the outer-layer tube cannot be damaged, the service life of the outer-layer tube can be prolonged, the situation that catheter residues fall into a blood vessel is reduced, and the use risk of the catheter is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a developing indicating catheter. Background Art

[0002] In vascular interventional surgery, a catheter needs to be extended from a blood vessel to a lesion position, and then treatment operations are performed on the lesion.

[0003] In existing vascular interventional surgeries, in order to facilitate tracking of the position of the inserted catheter, a developing device is generally installed at the end of the catheter for doctors to judge the specific position of the catheter in the blood vessel and assist doctors in operation.

[0004] Currently, the common developing methods on catheters include the following two; First: Add a developing ring made of platinum-iridium alloy at the front end of the catheter, and track the developing ring through external equipment to observe the position of the catheter end. However, the developing ring made of platinum-iridium alloy is at the catheter end, making the catheter end too hard. When in use, there is a risk of puncturing the blood vessel. At the same time, due to its metal property, the softness is poor, resulting in poor bending performance of the catheter.

[0005] Second: Add a developing agent material to the polymer outer layer, mix the polymer material with the developing agent, and then form a polymer outer tube by extrusion. This solution directly replaces the developing metal and changes the material of the catheter, and uses the catheter itself to achieve development. However, the proportion of the added developing agent material cannot be too large, as it is easy to accelerate the aging of the catheter. During the product's validity period, its outer tube will deteriorate into a powdery state, posing a risk of remaining in the blood vessel and endangering the patient's life. At the same time, due to the small proportion of the added developing agent material, the development is not obvious. Therefore, how to design a developing indicating catheter has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Utility Model

[0006] In order to solve at least one technical problem mentioned in the background art, the purpose of the utility model is to provide a developing indicating catheter to solve the problems of the traditional catheter's metal end puncturing the blood vessel and alleviating the problem of material aging debris falling off.

[0007] To achieve the above purpose, the utility model provides the following technical solution: A developing indicating catheter, comprising an inner tube, a metal middle layer tube sleeved outside the inner tube, an outer layer tube sleeved outside the metal middle layer tube, and a developing wire installed inside the outer layer tube along the axis direction of the outer layer tube.

[0008] Further, there are multiple developing wires, which are distributed circumferentially along the outer layer tube.

[0009] Further, there are eight developing wires, which are evenly distributed circumferentially along the outer layer tube.

[0010] Further, the inner tube is made of polytetrafluoroethylene material.

[0011] Further, the metal middle layer tube is a metal braided mesh structure.

[0012] Further, the outer layer tube is made of nylon elastomer material.

[0013] Further, the outer layer tube is made of thermoplastic polyurethane elastomer material.

[0014] Further, the outer layer tube is made of nylon material.

[0015] Further, the length direction of the developing wire is parallel to the axis direction of the outer layer tube.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: In the present utility model, the developing wire is embedded in the outer layer tube, and under the irradiation of X-rays, the position of the catheter is visualized by using the developing wire. Compared with the traditional catheter in which the developing metal is directly fixed at the front end of the catheter, it can prevent the developing ring from touching the blood vessel and avoid the risk of puncturing the blood vessel. Compared with adding a developer between polymer materials, the developing wire in this solution is embedded in the outer layer tube, which will not damage the internal material structure of the outer layer tube, can extend the service life of the outer layer tube, reduce the situation of catheter residue falling into the blood vessel, and reduce the use risk of the catheter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the outer layer tube and the metal middle layer tube of the present utility model;

[0019] Figure 3 is a schematic diagram of the structure of the outer layer tube and the developing wire of the present utility model.

[0020] In the figure: 1, inner tube; 2, metal middle layer tube; 3, outer layer tube; 4, developing wire. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figure 1 and Figure 2 , this embodiment provides a developing indication catheter, mainly used to mark the position of the catheter during vascular interventional therapy surgery, and solve the problems of puncturing the blood vessel by the traditional catheter and aging of the catheter material.

[0023] It includes an inner tube 1, a metal middle layer tube 2 and an outer layer tube 3. The metal middle layer tube 2 is sleeved outside the inner tube 1, and the outer layer tube 3 is sleeved outside the metal middle layer tube 2. The inner tube 1 is made of polytetrafluoroethylene material, and the outer layer tube 3 is one of nylon elastomer, thermoplastic polyurethane elastomer and nylon.

[0024] Among them, the metal middle layer tube 2 is a metal braided mesh structure, which acts as the middle layer of the catheter, can significantly enhance the overall strength of the catheter, enable it to withstand higher injection pressure and torsion control force, and at the same time endow the catheter with good anti-breakage and anti-twisting capabilities, so that it is more durable and reliable during use, and also gives the catheter a certain compliance and elasticity, enabling it to be flexibly operated in a complex vascular environment.

[0025] For the convenience of the visibility of the catheter in fluoroscopic examination to help doctors locate and operate more accurately. A fluoroscopic wire 4 is installed inside the outer layer tube 3. The fluoroscopic wire 4 is located in the middle of the thickness of the outer layer tube 3, and the length direction of the fluoroscopic wire 4 is parallel to the axis direction of the outer layer tube 3. As Figure 3 shown, that is, the fluoroscopic wire 4 is embedded in the outer layer tube 3, so as to improve the fluoroscopic performance of the catheter under X-rays, and can perform fluoroscopic observation on the entire catheter section, and the fluoroscopic effect is better.

[0026] Because the fluoroscopic wire 4 is embedded in the outer layer tube 3, the material of the outer layer tube 3 is not changed. Compared with the polymer outer tube extruded by mixing with a fluoroscopic agent, it can delay the aging of the outer layer tube 3 and improve the service life. At the same time, the fluoroscopic wire 4 is in the form of a wire, and its degree of deformation is high, which can ensure the softness of the catheter to the greatest extent and facilitate the twisting and movement of the catheter in complex blood vessels.

[0027] Please refer to Figure 3 , in which, for the convenience of tracking and identifying the catheter, there are multiple fluoroscopic wires 4, specifically eight, which are evenly distributed circumferentially around the outer layer tube 3. Through the eight fluoroscopic wires 4, the general outline of the catheter is formed, which is convenient for doctors to operate flexibly.

[0028] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model.

Claims

1. A developing indication catheter, comprising an inner tube (1), characterized in that, A metal middle layer tube (2) is sleeved outside the inner tube (1), an outer layer tube (3) is sleeved outside the metal middle layer tube (2), and a developing wire (4) is installed inside the outer layer tube (3) along the axis direction of the outer layer tube (3) itself.

2. The developing indication catheter according to claim 1, wherein There are multiple developing wires (4), which are circumferentially distributed along the outer layer tube (3).

3. The developing indication catheter according to claim 2, wherein There are eight developing wires (4), which are evenly distributed along the circumference of the outer layer tube (3).

4. The developing indication catheter according to claim 1, wherein The inner tube (1) is made of polytetrafluoroethylene material.

5. The developing indication catheter according to claim 1, characterized in that, The metal middle layer tube is a metal braided mesh structure.

6. The developing indication catheter according to claim 1, characterized in that, The outer layer tube (3) is made of nylon elastomer material.

7. The developing indication catheter according to claim 1, wherein The outer layer tube (3) is made of thermoplastic polyurethane elastomer material.

8. The developing indication catheter according to claim 1, wherein The outer layer tube (3) is made of nylon material.

9. The developing indication catheter according to claim 1, characterized in that, The length direction of the developing wire (4) is parallel to the axis direction of the outer layer tube (3).

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