Reducing balloon catheter

Abstract

The utility model discloses a variable-diameter balloon catheter, and relates to the technical field of medical instruments. Comprising a variable-diameter balloon, an outer tube and an inner tube, the near-end diameter of the variable-diameter balloon is larger than the far-end diameter, the diameter of the variable-diameter balloon is reduced in a stepped mode from the near end to the far end, the near end of the variable-diameter balloon is connected with the outer tube, the inner tube with one end connected with the far end of the variable-diameter balloon is arranged in the outer tube in a sleeved mode, the near-end diameter of the variable-diameter balloon is L1, and the near-end diameter of the variable-diameter balloon is L2. The diameter of the far end of the variable-diameter balloon is L2, and the difference value between L1 and L2 is larger than 1 nm. The variable-diameter balloon adopts a stepped variable-diameter design, can be better attached to complex blood vessels and is high in compliance, the blood flow plugging effect is guaranteed, the situation that the blood vessels are damaged due to the fact that the supporting force of the variable-diameter balloon is too large can be avoided, the integrated Y-shaped Luer seat is adopted, the sealing performance is good, liquid filling is achieved, the time for drawing out the variable-diameter balloon is short, operation of doctors is facilitated, risks in the operation are reduced, and the operation efficiency is improved. The success rate of an operation is improved, and the market competitiveness of a product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a variable-diameter balloon catheter. Background Art

[0002] In the field of cerebrovascular treatment, interventional technology can treat ischemic stroke and hemorrhagic stroke, carotid artery stenosis, vertebral artery stenosis, cerebral artery stenosis, cerebral aneurysm, cerebral arteriovenous malformation, etc. Therefore, balloon catheters play an important role in the field of intracranial interventional medical engineering.

[0003] Currently, most balloon catheters on the market are equal-diameter balloons. For complex and tortuous intracranial vascular lesions, such as when the lesion is near X-shaped or Y-shaped blood vessels, equal-diameter balloons cannot fit the complex blood vessels well, have weak compliance, and have poor blood flow blocking effects. There is also a risk of damaging blood vessels due to excessive support force. Summary of the invention

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a variable diameter balloon catheter, comprising a variable diameter balloon, an outer tube and an inner tube, the proximal diameter of the variable diameter balloon being larger than the distal diameter, the diameter of the variable diameter balloon decreasing in a step-like manner from the proximal end to the distal end, the proximal end of the variable diameter balloon being connected to the outer tube, the interior of the outer tube being provided with an inner tube having one end connected to the distal end of the variable diameter balloon.

[0005] As a preferred technical solution of the utility model, the proximal diameter of the variable diameter balloon is L1, the distal diameter of the variable diameter balloon is L2, and the difference between L1 and L2 is greater than 1 nm.

[0006] As a preferred technical solution of the present utility model, the variable diameter balloon is integrally formed.

[0007] As a preferred technical solution of the utility model, the inner sides of the proximal end and the distal end of the variable diameter balloon are respectively welded to the outer tube and the inner tube through a polyethylene connecting layer.

[0008] As a preferred technical solution of the utility model, the outer sides of the proximal end and the distal end of the variable-diameter balloon are welded to the polyethylene connecting layer through a resin sealing layer.

[0009] As a preferred technical solution of the utility model, the variable diameter balloon, the outer tube and the inner tube are all coaxially arranged, and the variable diameter balloon is made of polyurethane material.

[0010] As a preferred technical solution of the utility model, the interior of the variable diameter balloon is connected to the gap between the outer tube and the inner tube, and the size of the gap between the outer tube and the inner tube is greater than 1 nm.

[0011] As a preferred technical solution of the utility model, it also includes a Y-shaped Luer seat, wherein one end of the outer tube away from the variable diameter balloon is fixedly connected to the Y-shaped Luer seat, and one end of the inner tube away from the variable diameter balloon extends to the interior of the Y-shaped Luer seat and is fixedly connected thereto, and the Y-shaped Luer seat includes an integrally formed main Luer connector and an auxiliary Luer connector.

[0012] As a preferred technical solution of the utility model, it also includes a stress diffusion tube, which is sleeved on the outside of the connection between the outer tube and the Y-shaped Luer seat.

[0013] As a preferred technical solution of the utility model, it also includes at least three platinum developing rings, which are all arranged inside the inner tube, two of which are located corresponding to the proximal end and the distal end of the variable diameter balloon, and the other is located inside the end of the inner tube away from the Y-shaped Luer seat.

[0014] Compared with the prior art, the utility model provides a variable diameter balloon catheter, which has the following beneficial effects:

[0015] The variable diameter balloon catheter has a stepped diameter reduction design, which can better fit complex blood vessels and has strong compliance, thereby ensuring the blood flow blocking effect and avoiding the situation where the variable diameter balloon's excessive supporting force damages the blood vessels. It adopts an integrated Y-shaped Luer seat with good sealing performance, and the time for liquid filling and withdrawal of the variable diameter balloon is short, which facilitates doctors' surgical operations, reduces intraoperative risks, increases the success rate of surgery, and improves the market competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a variable diameter balloon catheter proposed by the utility model;

[0017] Figure 2 The utility model provides a cross-sectional view of the variable diameter balloon structure of the variable diameter balloon catheter.

[0018] In the figure: 1, variable diameter balloon; 11, proximal end; 12, distal end; 2, outer tube; 3, inner tube; 4, Y-shaped Luer seat; 5, stress diffusion tube; 6, platinum developing ring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-2A variable diameter balloon catheter comprises a variable diameter balloon 1, an outer tube 2 and an inner tube 3. The diameter of the proximal end 11 of the variable diameter balloon 1 is greater than the diameter of the distal end 12. The diameter of the variable diameter balloon 1 decreases in a step-like manner from the proximal end 11 to the distal end 12. The proximal end 11 of the variable diameter balloon 1 is connected to the outer tube 2. The inner tube 3 is sleeved inside the outer tube 2 and one end of the inner tube 3 is connected to the distal end 12 of the variable diameter balloon 1.

[0021] As a specific technical solution of this embodiment, the diameter of the proximal end 11 of the variable diameter balloon 1 is L1, the diameter of the distal end 12 of the variable diameter balloon 1 is L2, and the difference between L1 and L2 is greater than 1 nm.

[0022] As a specific technical solution of this embodiment, the variable diameter balloon 1 is integrally formed. The integrally formed variable diameter balloon 1, with a stepped variable diameter design, matches the characteristics of the blood vessel being thin at the distal end and thick at the proximal end, and can better fit the blood vessel.

[0023] As a specific technical solution of this embodiment, the inner sides of the proximal end 11 and the distal end 12 of the variable diameter balloon 1 are respectively welded to the outer tube 2 and the inner tube 3 through a polyethylene connecting layer, and the outer sides of the proximal end 11 and the distal end 12 of the variable diameter balloon 1 are welded to the polyethylene connecting layer through a resin sealing layer. The inner and outer sides of the proximal end 11 and the distal end 12 of the variable diameter balloon 1 are respectively welded with a polyethylene connecting layer and a resin sealing layer, which greatly improves the stability and sealing of the connection between the variable diameter balloon 1 and the inner tube 3 and the outer tube 2.

[0024] As a specific technical solution of this embodiment, the variable diameter balloon 1, the outer tube 2 and the inner tube 3 are all coaxially arranged, and the variable diameter balloon 1 is made of polyurethane material. The polyurethane material has good stability, chemical resistance, resilience and mechanical properties, has smaller compression deformation, and has good anti-toxic performance.

[0025] As a specific technical solution of this embodiment, the interior of the variable diameter balloon 1 is connected to the gap between the outer tube 2 and the inner tube 3, and the gap size between the outer tube 2 and the inner tube 3 is greater than 1 nm. The liquid can fill the variable diameter balloon 1 through the gap between the inner tube 3 and the outer tube 2.

[0026] As a specific technical solution of this embodiment, a Y-shaped Luer seat 4 is also included. The end of the outer tube 2 away from the variable diameter balloon 1 is fixedly connected to the Y-shaped Luer seat 4. The end of the inner tube 3 away from the variable diameter balloon 1 extends to the inside of the Y-shaped Luer seat 4 and is fixedly connected thereto. The Y-shaped Luer seat 4 includes an integrally formed main Luer connector and an auxiliary Luer connector. Figure 1 The main Luer connector and the auxiliary Luer connector are respectively located at the two ends of the Y-shaped Luer seat 4 away from the outer tube 2. The main Luer connector is a guide wire cavity, which is connected to the guide wire and is used to push the catheter and the guide wire into and out of the blood vessel. The auxiliary Luer connector is a filling cavity, which is connected to the syringe and is used to fill or extract liquid.

[0027] As a specific technical solution of this embodiment, a stress diffusion tube 5 is also included. The stress diffusion tube 5 is sleeved on the outside of the connection between the outer tube 2 and the Y-shaped Luer seat 4 to prevent the inner tube 3 and the outer tube 2 from bending at this position.

[0028] As a specific technical solution of this embodiment, it also includes at least three platinum developing rings 6, and the three platinum developing rings 6 are all arranged inside the inner tube 3, two of which are located corresponding to the proximal end 11 and the distal end 12 of the variable diameter balloon 1, and the other is located inside the end of the inner tube 3 away from the Y-shaped Luer seat 4. The platinum developing ring 6 facilitates precise positioning during surgery, and the spacing between the two developing rings matches the length of the variable diameter balloon 1, which is convenient for judging the position of the variable diameter balloon 1, and the other is convenient for controlling the direction of the inner tube 3.

[0029] To sum up, the variable diameter balloon catheter and the stepped variable diameter design of the variable diameter balloon 1 can better fit complex blood vessels and have strong compliance, which can ensure the blood flow blocking effect and avoid the situation where the variable diameter balloon 1 supports too much and damages the blood vessels. It adopts an integrated Y-shaped Luer seat 4 with good sealing performance, and the time for liquid filling and withdrawal of the variable diameter balloon 1 is short, which is convenient for doctors to perform surgical operations, reduce intraoperative risks, increase the success rate of surgery, and improve the market competitiveness of products.

[0030] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable diameter balloon catheter, characterized in that: The invention comprises a variable diameter balloon (1), wherein the diameter of the proximal end (11) of the variable diameter balloon (1) is greater than the diameter of the distal end (12), and the diameter of the variable diameter balloon (1) decreases in a step-like manner from the proximal end (11) to the distal end (12). The proximal end (11) of the variable diameter balloon (1) is connected to an outer tube (2), and the inner part of the outer tube (2) is provided with an inner tube (3) whose one end is connected to the distal end (12) of the variable diameter balloon (1).

2. The variable diameter balloon catheter according to claim 1, characterized in that: The diameter of the proximal end (11) of the variable diameter balloon (1) is L1, the diameter of the distal end (12) of the variable diameter balloon (1) is L2, and the difference between L1 and L2 is greater than 1 nm.

3. The variable diameter balloon catheter according to claim 1, characterized in that: The variable diameter balloon (1) is integrally formed.

4. The variable diameter balloon catheter according to claim 1, characterized in that: The inner sides of the proximal end (11) and the distal end (12) of the variable diameter balloon (1) are respectively welded to the outer tube (2) and the inner tube (3) via a polyethylene connecting layer.

5. The variable diameter balloon catheter according to claim 1, characterized in that: The outer sides of the proximal end (11) and the distal end (12) of the variable diameter balloon (1) are welded to the polyethylene connecting layer via a resin sealing layer.

6. The variable diameter balloon catheter according to claim 1, characterized in that: The variable diameter balloon (1), the outer tube (2) and the inner tube (3) are all coaxially arranged, and the variable diameter balloon (1) is made of polyurethane material.

7. The variable diameter balloon catheter according to claim 1, characterized in that: The interior of the variable diameter balloon (1) is connected to the gap between the outer tube (2) and the inner tube (3), and the size of the gap between the outer tube (2) and the inner tube (3) is greater than 1 nm.

8. The variable diameter balloon catheter according to claim 1, characterized in that: It also comprises a Y-shaped Luer seat (4), wherein one end of the outer tube (2) away from the variable diameter balloon (1) is fixedly connected to the Y-shaped Luer seat (4), and one end of the inner tube (3) away from the variable diameter balloon (1) extends into the interior of the Y-shaped Luer seat (4) and is fixedly connected thereto, and the Y-shaped Luer seat (4) comprises an integrally formed main Luer connector and an auxiliary Luer connector.

9. The variable diameter balloon catheter according to claim 8, characterized in that: It also includes a stress diffusion tube (5), which is sleeved on the outside of the connection between the outer tube (2) and the Y-shaped Luer seat (4).

10. The variable diameter balloon catheter according to claim 8, characterized in that: It also includes at least three platinum developing rings (6), which are all arranged inside the inner tube (3), two of which are located corresponding to the proximal end (11) and the distal end (12) of the variable diameter balloon (1), and the other is located inside the end of the inner tube (3) away from the Y-shaped Luer seat (4).

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