C-shaped bent stepped balloon catheter

Abstract

The utility model provides a C-shaped curved stepped balloon catheter, which relates to the technical field of kidney intervention.The C-shaped curved stepped balloon catheter comprises a first balloon head end, the side end of the first balloon head end is integrally communicated with a concave bent wrinkled edge, and the side end of the concave bent wrinkled edge is integrally communicated with a second balloon tail end. In a non-working state, the wall of the balloon in the whole structure is folded to be in a straight column shape, a guide wire can conveniently pass through the balloon to reach a diseased region, in a working state, the whole balloon is in a C shape and is divided into two sections, the diameter of the head end of the first balloon ranges from 4 mm to 5 mm, the first balloon crosses an internal fistula anastomotic stoma to be placed in an artery, the diameter of the tail end of the second balloon ranges from 6 mm to be placed in a vein, and after the whole balloon is placed into a target lesion through the guide wire, the whole balloon is placed into the target lesion through the guide wire. The bending direction is adjusted, a pressure pump is connected, pressurization is conducted, the head end of the first balloon, the concave bending wrinkled edge and the tail end of the second balloon are expanded, arteries and veins with different inner diameters are expanded at the same time through radial force, and fracture caused by tearing of anastomotic stoma is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of kidney intervention, in particular to a C-shaped curved stepped balloon catheter. Background Art

[0002] Hemodialysis is a renal replacement therapy for patients with acute and chronic renal failure. It involves draining blood from the body and passing it through a dialyzer composed of numerous hollow fibers. Blood and a solution containing electrolytes similar to those in the body (dialysate) undergo a substance exchange process within and outside the fibers through diffusion and convection, removing metabolic waste products, maintaining electrolyte and acid-base balance, and simultaneously removing excess water. The purified blood is then returned to the body. The entire process is called hemodialysis. Arteriovenous fistulas are crucial for maintenance hemodialysis patients and are often referred to as their "lifeline." Stenosis is a common complication of fistulas, with stenosis near the anastomosis (type I stenosis) occurring in approximately 60% of cases. The anastomotic course of the artery and vein at a typical arteriovenous fistula is approximately C-shaped, with an arterial diameter of 3-4 mm and a venous diameter of 5-6 mm. Balloon dilatation is the preferred treatment for fistula stenosis.

[0003] In the existing technology, during interventional procedures, due to the difficulty in balloon anchoring, the balloon needs to be placed across the anastomosis and into the artery and vein. However, the inner diameters of the artery and vein of the arteriovenous fistula are inconsistent, and conventional cylindrical balloons cannot meet both requirements. At the same time, when the conventional cylindrical balloon is used, it tends to become straight after being pressurized and expanded across the anastomosis, thereby causing the anastomosis to tear and rupture. Therefore, it is necessary to propose a new type of C-shaped stepped balloon catheter. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that during interventional operations, due to the difficulty in balloon anchoring, the balloon needs to be placed across the anastomosis and into the artery and vein. However, the inner diameters of the artery and vein of the arteriovenous fistula are inconsistent, and the conventional cylindrical balloon cannot meet the requirements at the same time. When the conventional cylindrical balloon is used, it tends to become straight after being pressurized and expanded across the anastomosis, thereby causing the anastomosis to be torn and ruptured. A C-shaped stepped balloon catheter is proposed.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a C-shaped stepped balloon catheter, comprising a first balloon head end, the side end of the first balloon head end is integrally connected with a concave bent corrugated edge, the side end of the concave bent corrugated edge is integrally connected with a second balloon tail end, and the outer side wall surfaces of the first balloon head end, the concave bent corrugated edge and the second balloon tail end are provided with convex corrugated edges.

[0006] Preferably, the side end of the tail end of the second balloon is connected to a wire feeding tube, and the inner plug of the wire feeding tube is connected to a guide wire.

[0007] Preferably, a link is installed on the peripheral side of the outer wall of the wire inlet tube, and the top of the link is connected to the injection liquid tube interface through a control valve.

[0008] Preferably, the diameter of the first balloon head end is smaller than the diameter of the second balloon tail end.

[0009] Preferably, the diameter of the first balloon tip after expansion is 4-5 mm, and the diameter of the second balloon tail after expansion is 6 mm.

[0010] Preferably, the injection liquid tube interface performs injection operation through a pressure pump.

[0011] Compared with the prior art, the advantages and positive effects of the present invention are:

[0012] 1. In the present invention, when in use, the medical staff inserts the first balloon head end and the second balloon tail end that have not been injected with saline into the patient's vein through the guide wire, and then pushes them toward the artery. When the bottom of the second balloon tail end contacts the artery, the guide wire is withdrawn, and the medical staff uses a pressure pump to inject saline from the injection tube interface 8 into the first balloon head end and the second balloon tail end. When the saline enters the first balloon head end and the second balloon tail end, the first balloon head end and the second balloon tail end begin to expand. As the pressure increases, the first balloon head end and the second balloon tail end begin to expand, and the interaction force causes the first balloon head end and the second balloon tail end to expand at the concave bend wrinkle edge and With the cooperation of the convex corrugated edge, the whole bends to form a C-shaped structure, the tail end of the second balloon enters the artery, and the convex corrugated edge forms a convex surface. At the end of expansion, the diameter of the head end of the first balloon is 4-5mm, and the diameter of the tail end of the second balloon is 6mm. At this time, the tail end of the second balloon can match the inner diameter of the artery, which can effectively expand the stenosis of the artery and restore blood flow. At the same time, due to the uniformity of the expansion of the head end and the tail end of the second balloon and the gentle expansion method of the blood vessel wall, the overall bend can be effectively made to fit the inner wall of the artery more closely. At the same time, the convex surface formed by the convex corrugated edge helps to expand the blood vessels, reduce direct damage to the blood vessel walls, and radially expand the arteries to avoid tearing the anastomosis and causing rupture. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model provides an overall three-dimensional diagram of a C-shaped curved stepped balloon catheter;

[0014] Figure 2 The utility model proposes a C-shaped curved stepped balloon catheter Figure 1 Enlarged stereogram at point A in the middle;

[0015] Figure 3 The utility model proposes a C-shaped curved stepped balloon catheter that presents a straight columnar structure under negative pressure;

[0016] Figure 4 The utility model provides a C-shaped structure schematic diagram of a C-shaped stepped balloon catheter after expansion.

[0017] Legend: 1. Tip of the first balloon; 2. Concave bend and wrinkled edge; 3. Tail of the second balloon; 4. Guidewire; 5. Wire inlet tube; 6. Injection tube interface; 7. Convex wrinkled edge. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Example 1, as Figure 1-Figure 4 As shown, the utility model provides a C-shaped stepped balloon catheter, comprising a first balloon head end 1, the side end of the first balloon head end 1 is integrally connected with a concave bent corrugated edge 2, the side end of the concave bent corrugated edge 2 is integrally connected with a second balloon tail end 3, and the outer side wall surfaces of the first balloon head end 1, the concave bent corrugated edge 2 and the second balloon tail end 3 are provided with a convex corrugated edge 7.

[0021] The effect achieved by the entire embodiment 1 is that, when in use, the medical staff guides the first balloon head end 1 and the second balloon tail end 3 into the patient's vein through the guide wire 9 without injecting physiological saline, and then pushes them toward the artery. When the bottom of the second balloon tail end 3 contacts the inner wall of the artery, the guide wire is withdrawn, and the medical staff uses a pressure pump to inject physiological saline from the injection tube interface 6 into the first balloon head end 1 and the second balloon tail end 3, so that the first balloon head end 1 and the second balloon tail end 3 are expanded. As the pressure increases, the first balloon head end 1 and the second balloon tail end 3 begin to expand gradually, and the force generated by the interaction causes the first balloon head end 1 and the second balloon tail end 3 to cooperate at the concave bent fold edge 2. The whole balloon is bent to form a C-shaped structure to conform to the natural curvature of the blood vessel, so that the second balloon tail end 3 enters the artery and the convex wrinkled edge 7 forms a convex surface. When the expansion is completed, the diameter of the first balloon head end 1 is 4-5mm, and the diameter of the second balloon tail end 3 is 6mm. At this time, the second balloon tail end 3 can match the inner diameter of the artery, which can effectively expand the stenosis of the artery and restore the smooth blood flow. At the same time, due to the uniformity of the balloon expansion and the gentle expansion method of the blood vessel wall, the overall bending can be effectively made to fit the inner wall of the artery. At the same time, the convex surface formed by the convex wrinkled edge 7 helps to expand the blood vessel, reduce direct damage to the blood vessel wall, and radially expand the artery to avoid tearing the anastomosis and causing rupture.

[0022] Example 2, as Figure 1-Figure 4 As shown, further, the side end of the second balloon tail end 3 is connected to the wire feed tube 5, the internal plug of the wire feed tube 5 is connected to the guide wire 4, the outer wall of the wire feed tube 5 is installed with a link, the top of the link is connected to the injection liquid tube interface 6 through the control valve, the diameter of the first balloon head end 1 is smaller than the diameter of the second balloon tail end 3, the diameter of the first balloon head end 1 after operation expansion is 4-5mm, the diameter of the second balloon tail end 3 after operation expansion is 6mm, and the injection liquid tube interface 6 is injected by a pressure pump.

[0023] The effect achieved by the entire embodiment 2 is that, during injection, medical personnel can introduce the first balloon head end 1, the concave bent wrinkled edge 2 and the second balloon tail end 3 through the guide wire 4, and perform injection operations through the injection liquid tube interface 6 and the pressure pump.

[0024] Working principle: First, when injecting, the first balloon head end 1 and the second balloon tail end 3 are in a negative pressure state, forming a wrinkled straight column. Then the medical staff can introduce the first balloon head end 1, the concave bent wrinkled edge 2 and the second balloon tail end 3 from the wire inlet tube 5 through the guide wire 4. After introduction, the guide wire 4 is pulled out, and then the medical staff connects the physiological saline through the injection tube interface 6 and the pressure pump to perform the injection operation, so that the physiological saline enters and is injected into the first balloon head end 1 and the second balloon tail end 3. Then the first balloon head end 1 and the second balloon tail end 3 are expanded. As the pressure increases, the first balloon head end 1 and the second balloon tail end 3 begin to expand, and the force generated by the interaction causes the first balloon head end 1 and the second balloon tail end 3 to be in the concave The bent corrugated edge 2 cooperates to perform overall bending to form a C-shaped step, so that the second balloon tail end 3 enters the artery and the convex corrugated edge 7 forms a convex surface. When the expansion is completed, the diameter of the first balloon head end 1 is 4-5mm, and the diameter of the second balloon tail end 3 is 6mm. At this time, the second balloon tail end 3 can match the inner diameter of the artery, which can effectively expand the stenosis of the artery and restore blood flow. At the same time, due to the uniformity of the expansion of the first balloon head end and the second balloon tail end and the gentle expansion method of the blood vessel wall, the overall bending can be effectively made to fit the inner wall of the artery. At the same time, the convex surface formed by the convex corrugated edge 7 helps to expand the blood vessels, reduce direct damage to the blood vessel walls, and radially expand the arteries to avoid tearing the anastomosis and causing rupture.

[0025] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A C-shaped stepped balloon catheter, characterized by: The invention comprises a first balloon head end (1), the side end of the first balloon head end (1) is integrally connected with a concave curved folded edge (2), the side end of the concave curved folded edge (2) is integrally connected with a second balloon tail end (3), and the outer side wall surfaces of the first balloon head end (1), the concave curved folded edge (2) and the second balloon tail end (3) are provided with a convex folded edge (7).

2. The C-shaped stepped balloon catheter according to claim 1, characterized in that: The side end of the second balloon tail end (3) is connected to a wire feeding tube (5), and the inner plug of the wire feeding tube (5) is connected to a guide wire (4).

3. The C-shaped stepped balloon catheter according to claim 2, characterized in that: A link is installed on the peripheral side of the outer wall of the wire inlet tube (5), and the top of the link is connected to an injection liquid tube interface (6) through a control valve.

4. The C-shaped stepped balloon catheter according to claim 1, characterized in that: The diameter of the first balloon head end (1) is smaller than the diameter of the second balloon tail end (3).

5. The C-shaped stepped balloon catheter according to claim 1, characterized in that: The diameter of the first balloon head end (1) after expansion is 4-5 mm, and the diameter of the second balloon tail end (3) after expansion is 6 mm.

6. The C-shaped stepped balloon catheter according to claim 3, characterized in that: The injection liquid tube interface (6) performs injection operation through a pressure pump.

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