Peripheral vessel balloon dilatation catheter

Abstract

The utility model relates to the technical field of medical instruments, in particular to a peripheral blood vessel balloon dilatation catheter which comprises an outer tube, a connecting seat, an inner tube, a circular ring supporting block and a blood circulation pipeline, the outer tube is provided with a balloon, the connecting seat is connected to the end, away from the balloon, of the outer tube, the connecting seat is provided with an inflation inlet, and a guide wire penetrating inlet is formed in the connecting seat. The inner tube is coaxially and fixedly connected to the interior of the outer tube, the inner tube is connected with the guide wire penetrating opening, the outer wall of the inner tube and the inner wall of the outer tube are provided with inflation pipelines, one end of the filling pipeline is communicated with the balloon, the inflation opening is communicated with the other end of the filling pipeline, and the inner tube is sleeved with the circular ring supporting block; one end of the annular supporting block abuts against the inner wall, located at one end of the balloon, of the outer tube, the outer wall of the annular supporting block abuts against the inner wall, located at the outer tube of the balloon, of the outer tube, one end of the blood circulation pipeline is communicated with the outer wall of the outer tube, and the other end of the blood circulation pipeline penetrates through the annular supporting block to be communicated with the outer wall, close to one end of the balloon, of the outer tube. And the operation risk of the patient is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a peripheral vascular balloon dilatation catheter. Background Art

[0002] When performing balloon dilatation or stent implantation on the patient's stenotic peripheral blood vessels or coronary arteries, a medical guidewire is generally sent into the blood vessel to be treated, and then the pre-expanded balloon catheter is sent to the lesion along the guidewire. The center of the balloon catheter has an empty tube for the guidewire to pass through, and the empty tube is surrounded by a closed annular balloon, which can be connected to an external pressure pump. After the balloon is filled with liquid by the pressure pump, the balloon can be expanded to complete the expansion of the stenotic lumen, and finally whether to implant a stent is selected according to the condition. Generally speaking, the filling of the balloon is often completed within a few seconds, and the patient's ischemic time is short at this time, which is generally safe. When the plaque at the stenosis of the patient's blood vessel is harder or a drug balloon is used, it often takes a long time to expand, resulting in a long-term blockage of the blood flow of the target blood vessel, and the patient's myocardium or tissue is in an ischemic state for a long time, which will greatly increase the patient's surgical risk. Therefore, there is an urgent need for a peripheral vascular balloon dilatation catheter to solve the problem of encountering harder calcium plaque stenosis lesions, so that the blood flow of the blood vessel can flow normally, so that the patient's heart or tissue is not ischemic, thereby reducing the risk of surgery for the patient. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a peripheral vascular balloon dilatation catheter, which can solve the problem of hard calcium plaque stenosis and enable the blood flow in the blood vessels to circulate normally, so that the patient's heart or tissue will not be ischemic, thereby reducing the risk of surgery for the patient.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a peripheral vascular balloon dilatation catheter, comprising:

[0005] an outer tube, one end of which is provided with a balloon;

[0006] A connecting seat, which is connected to the end of the outer tube away from the balloon, and is provided with an inflation port and a guide wire insertion port;

[0007] The inner tube is coaxially fixedly connected to the inner part of the outer tube, one end of the inner tube is connected to the guide wire insertion port, the outer wall of the inner tube and the inner wall of the outer tube are provided with an inflation channel, one end of the inflation channel is connected to the balloon, and the inflation port is connected to the other end of the inflation channel;

[0008] A circular support block, the circular support block is sleeved with the inner tube, one end of the circular support block abuts against the inner wall of the outer tube at one end of the balloon, and the outer wall of the circular support block abuts against the inner wall of the outer tube of the balloon;

[0009] A blood circulation conduit, one end of which is connected to the outer wall of the exterior, and the other end of which passes through the annular support block and is connected to the outer wall of the outer tube near one end of the balloon.

[0010] Furthermore, a developing mark is provided on the outer wall of the outer tube located on the balloon.

[0011] Furthermore, two development marks are arranged and distributed along the axial direction of the outer tube.

[0012] Furthermore, one of the development marks is located on a side of the balloon close to the connecting seat, and one of the development marks is located on a side of the balloon away from the connecting seat.

[0013] Furthermore, the material of the annular support block is nickel-titanium alloy.

[0014] The beneficial effect of the utility model is that by arranging a circular support block and a blood circulation pipe, the circular support block supports the outer tube, so that the outer tube is not easily deformed, one end of the blood circulation pipe is connected to the outer wall of the outer tube, and the other end of the blood circulation pipe passes through the circular support block to connect to the outer wall of the outer tube near one end of the balloon; when the surface of the balloon fits the blood vessel wall, blood cannot flow between the balloon and the blood vessel wall, so that blood flows through the blood circulation pipe, avoiding long-term ischemia of the distal end of the patient's lesion and increasing the patient's surgery-related risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a peripheral vascular balloon dilatation catheter according to a specific embodiment of the utility model;

[0016] Figure 2 for Figure 1 A-direction cross-sectional view.

[0017] Description of symbols

[0018] 1. Outer tube; 11. Balloon; 2. Connecting seat; 21. Inflation port; 22. Guide wire insertion port; 3. Inner tube; 4. Ring support block; 5. Blood circulation tube; 6. Development mark. DETAILED DESCRIPTION

[0019] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0020] Please refer to Figure 1 to Figure 2 , a peripheral vascular balloon 11 dilatation catheter, comprising:

[0021] An outer tube 1, one end of which is provided with a balloon 11;

[0022] A connecting seat 2, the connecting seat 2 is connected to one end of the outer tube 1 away from the balloon 11, the connecting seat 2 is provided with an inflation port 21, and the connecting seat 2 is provided with a guide wire insertion port 22;

[0023] The inner tube 3 is coaxially fixedly connected to the inner part of the outer tube 1, one end of the inner tube 3 is connected to the guide wire insertion port 22, the outer wall of the inner tube 3 and the inner wall of the outer tube 1 are provided with an inflation channel, one end of the inflation channel is connected to the balloon 11, and the inflation port 21 is connected to the other end of the inflation channel;

[0024] The annular support block 4 is sleeved with the inner tube 3, one end of the annular support block 4 abuts against the inner wall of the outer tube 1 at one end of the balloon 11, and the outer wall of the annular support block 4 abuts against the inner wall of the outer tube 1 at the balloon 11;

[0025] The blood circulation conduit 5 has one end connected to the outer wall of the exterior, and the other end of the blood circulation conduit 5 passes through the annular support block 4 and is connected to the outer wall of the outer tube 1 near the balloon 11 .

[0026] In the above embodiment, a guide wire is inserted from the guide wire insertion port 22, and the balloon 11 is made to reach the designated stenotic lesion portion through the guide wire. Then, the air pump is connected to the inflation port 21, and the air pump is turned on to inflate the balloon 11 to open the stenotic blood vessel. When the surface of the balloon 11 fits against the blood vessel wall, blood cannot flow between the balloon 11 and the blood vessel wall, thereby allowing blood to flow through the blood circulation duct 5, thereby avoiding prolonged ischemia at the distal end of the patient's lesion and increasing the patient's surgery-related risks.

[0027] As an optional embodiment, the outer tube 1 is provided with a developing mark 6 on the outer wall of the balloon 11 .

[0028] In the above embodiments, the development mark 6 can be set to observe whether the balloon 11 reaches the diseased blood vessel, so that the balloon 11 can be stably expanded subsequently.

[0029] As an optional implementation, two development marks 6 are arranged and distributed along the axial direction of the outer tube 1 .

[0030] As an optional embodiment, one of the development marks 6 is located on a side of the balloon 11 close to the connecting seat 2 , and one of the development marks 6 is located on a side of the balloon 11 away from the connecting seat 2 .

[0031] In the above embodiment, the length of the diseased blood vessel can be roughly determined by the distance between the two development marks 6 .

[0032] As an optional implementation, the material of the annular support block 4 is nickel-titanium alloy.

[0033] In the above embodiments, the annular support block 4 can prevent the outer tube 1 from deforming when passing through or reaching a stenotic lesion, thereby affecting the expansion of the balloon 11 and ensuring smooth flow of the blood circulation conduit 5 .

[0034] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A peripheral vascular balloon dilatation catheter, characterized in that: include: an outer tube, one end of which is provided with a balloon; A connecting seat, which is connected to the end of the outer tube away from the balloon, and is provided with an inflation port and a guide wire insertion port; The inner tube is coaxially fixedly connected to the inner part of the outer tube, one end of the inner tube is connected to the guide wire insertion port, the outer wall of the inner tube and the inner wall of the outer tube are provided with an inflation channel, one end of the inflation channel is connected to the balloon, and the inflation port is connected to the other end of the inflation channel; A circular support block, the circular support block is sleeved with the inner tube, one end of the circular support block abuts against the inner wall of the outer tube at one end of the balloon, and the outer wall of the circular support block abuts against the inner wall of the outer tube of the balloon; A blood circulation conduit, one end of which is connected to the outer wall of the exterior, and the other end of which passes through the annular support block and is connected to the outer wall of the outer tube near one end of the balloon.

2. The peripheral vascular balloon dilatation catheter according to claim 1, characterized in that: The outer tube is located on the outer wall of the balloon and is provided with a developing mark.

3. The peripheral vascular balloon dilatation catheter according to claim 2, characterized in that: Two development marks are arranged along the axial direction of the outer tube.

4. The peripheral vascular balloon dilatation catheter according to claim 3, characterized in that: One of the developing marks is located on a side of the balloon close to the connecting seat, and one of the developing marks is located on a side of the balloon away from the connecting seat.

5. The peripheral vascular balloon dilatation catheter according to claim 1, characterized in that: The material of the circular ring support block is nickel-titanium alloy.

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