Blood flow controllable perfusion type balloon catheter

Abstract

The utility model provides a blood flow controllable perfusion type balloon catheter. The blood flow controllable perfusion type balloon catheter comprises a catheter base, a balloon and a perfusion catheter connected between the catheter base and the balloon. The perfusion catheter is of a double-cavity structure and is composed of a guide wire cavity and a filling cavity which are independent of each other, and a blood perfusion hole is formed in the guide wire cavity. The perfusion catheter of a double-cavity structure is adopted, the perfusion catheter is composed of a guide wire cavity and a filling cavity which are independent of each other, the guide wire cavity is provided with a blood perfusion hole and a developing mark, the blood flow is controlled in cooperation with withdrawing of a guide wire, and blood flow can be kept to pass to a certain extent while it is guaranteed that the narrow part of the blood vessel is expanded in the sacculus filling state; complications caused by blood interruption in the operation of using the balloon are effectively avoided, and the operability and safety of the operation are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a balloon catheter, concretely relates to a blood flow controllable perfusion type balloon catheter system for blood vessel occlusion belongs to blood vessel interventional therapy technical field. BACKGROUND

[0002] For cardiovascular disease, balloon angioplasty is one of the most commonly used treatment methods. But the traditional balloon dilatation catheter will completely interrupt the blood flow in the blood vessel when dilating, causing insufficient blood supply to the myocardium of the patient, so the balloon cannot be dilated for a long time, and further causes restenosis. In addition, during such interventional treatment, directly opening the occluded blood vessel after withdrawing the balloon will cause further damage, which is called ischemia-reperfusion injury, and causes a series of complications, which may bring serious irreversible consequences to the patient. SUMMARY

[0003] In order to solve the problems of the above-mentioned traditional balloon dilatation catheter, the purpose of the utility model is to provide a blood flow controllable perfusion type balloon catheter, which controls the size of blood flow by the position of guide wire withdrawal and the number of blood perfusion holes, solves the complications caused by temporary ischemia and irreversible trauma caused by reperfusion after ischemia, and the specific technical scheme is as follows:

[0004] A blood flow controllable perfusion type balloon catheter, comprising a catheter seat, a balloon and a perfusion catheter connected between the catheter seat and the balloon, the perfusion catheter is a double-lumen structure, which is composed of a guide wire lumen and a filling lumen which are independent of each other, a blood perfusion hole is arranged on the guide wire lumen, and the blood perfusion holes are arranged in a staggered manner in the radial direction and parallel to the direction of the catheter in the axial direction.

[0005] The axial direction parallel to the direction of the catheter is to make the developing position on a straight line to more conveniently and clearly determine the withdrawal position and the number of exposed blood perfusion holes when the catheter is withdrawn, so as to determine the blood flow. The staggered arrangement in the radial direction can more accurately control the blood flow. The diameter of the holes on one product is fixed. If the guide wire is withdrawn to the first and second holes in the axial direction, the first hole in the radial direction can be exposed a little bit. At this time, the position of the guide wire is in the developing position, that is, as long as the guide wire does not complete the length of the developing position, the blood flow can be 1.1, 1.2, 1.3 or more times of the flow of one hole, and the flow is more accurately controlled.

[0006] Optionally, the balloon is arranged at the distal end of the perfusion catheter and communicates with the filling lumen.

[0007] Optionally, the diameter of the guide wire lumen is greater than or equal to 1.1 times the diameter of the guide wire, so as to ensure that the guide wire can be easily withdrawn or advanced.

[0008] Optionally, the number of blood perfusion holes is 2-32.

[0009] The number of blood perfusion holes needs to be determined according to the diameter and mechanical properties of the pipe material, and the number and arrangement of perfusion holes of different specifications of pipe material are different. For example, the number of radially staggered arrangements of the pipe material with a smaller diameter is relatively small, and the mechanical property requirement of the product use is the premise of the design.

[0010] Optionally, the opening area of a single blood perfusion hole is 0.01-4.0mm 2 The opening area mainly affects the blood flow.

[0011] Optionally, a development mark point is arranged between the blood perfusion holes in the axial direction, which is used for positioning the withdrawal guide wire.

[0012] Optionally, the development mark point is formed by fusing tungsten, barium sulfate and bismuth hypochlorite into the perfusion catheter to realize development.

[0013] Optionally, the axial length of the development mark point is less than or equal to the distance between the blood perfusion holes in the axial direction.

[0014] Optionally, the blood perfusion hole is formed by physical drilling, chemical corrosion, laser or thermal puncture technology.

[0015] Compared with the prior art, the advantage effect of the utility model lies in:

[0016] The blood perfusion balloon catheter of the utility model is suitable for re-expanding the stenosis part of the blood vessel. The utility model can supply blood to the ischemic area through the blood perfusion hole, reduce the ischemia-reperfusion injury, and adopt the perfusion catheter with a double-cavity structure, which is composed of a guide wire cavity and a filling cavity which are independent of each other. The blood perfusion hole and the development mark are arranged on the guide wire cavity, the blood flow is controlled by cooperating with the withdrawal guide wire, the blood flow through the stenosis part of the blood vessel can be maintained to a certain extent in the state of the inflated balloon, the complications caused by the interruption of blood in the operation of the balloon are effectively avoided, and the operability and safety of the operation are improved. DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the blood flow controllable perfusion balloon catheter of the utility model;

[0018] Figure 2 It is a structure schematic view of the balloon and the blood perfusion hole of the blood flow controllable perfusion balloon catheter of the utility model;

[0019] Figure 3 It is an unfolding schematic view of the blood perfusion hole of the blood flow controllable perfusion balloon catheter of the utility model on the perfusion catheter;

[0020] Figure 4The schematic diagram of the blood flow controllable perfusion type balloon catheter in use;

[0021] In the figure: 1, catheter seat, 2, guide wire cavity, 3, filling cavity, 4, developing mark point, 5, blood perfusion hole, 6, balloon, 7, mark ring, 8, guide wire, 9, perfusion catheter, 10, blood vessel wall. DETAILED DESCRIPTION

[0022] The utility model will be further described by specific embodiment in combination with the drawings:

[0023] Example 1

[0024] As Figure 1 shown: a blood flow controllable perfusion type balloon catheter system schematic diagram, including catheter seat 1, balloon 6 and the perfusion catheter 9 connected between catheter seat and balloon. The perfusion catheter 9 is double-cavity structure, is made of guide wire cavity 2 and filling cavity 3 that are independent of each other. The diameter of guide wire cavity 2 is greater than or equal to 1.1 times the guide wire diameter. And there are a plurality of blood perfusion holes 5 on guide wire cavity 2. The balloon 6 is at the distal end of the perfusion catheter 9 and is connected with the filling cavity, and the balloon is expanded by injecting the expanding agent into the filling cavity.

[0025] Example 2

[0026] As Figure 2 shown: the blood perfusion hole 5 is arranged on the guide wire cavity of the perfusion catheter.

[0027] Example 3

[0028] As Figure 3 shown: the arrangement of the blood perfusion hole 5 is staggered in the radial direction, and parallel to the catheter system in the axial direction. In addition, the developing mark point 4 is arranged between the adjacent blood perfusion holes 5 in the axial direction, to position the withdrawal guide wire. The distance between every two adjacent blood perfusion holes 5 should be greater than the length of the developing mark point 4. The blood perfusion hole 5 is formed by physical drilling, chemical corrosion, laser or thermal puncture technology.

[0029] Example 4

[0030] As Figure 4 shown: the use schematic diagram of the blood flow controllable perfusion type balloon catheter of the utility model shows that the effective working section of the balloon 6 is longer than the length of the blood vessel stenosis lesion position, and the blood vessel wall 10 can provide certain support for it. The length of the blood vessel stenosis lesion position accounts for 60%-80% of the effective working section of the balloon.

[0031] Example 5

[0032] The use method of the blood flow controllable perfusion type balloon catheter of the utility model is as follows:

[0033] The catheter system is guided into the blood vessel under the traction of the guide wire, and the balloon is located at the target lesion position of the blood vessel. The balloon is expanded to a suitable size to prop up the stenosis lesion position of the blood vessel. At this time, the guide wire can be withdrawn, and the operator determines the withdrawal position, i.e., the number of blood perfusion holes exposed to determine the size of the blood perfusion flow. After the operation is completed, the balloon is depressurized, and the catheter system is withdrawn from the blood vessel, and finally the guide wire is withdrawn.

[0034] Example 6

[0035] The specific control method of the blood flow size is that when the guide wire is withdrawn to the first visible mark point, it indicates that only one blood perfusion hole is in communication with the blood, at this time the blood flow is relatively small, and the guide wire is continuously withdrawn, that is, the more blood perfusion holes exposed, the larger the blood flow.

[0036] Example 7

[0037] The balloon 6 can be a compliant or non-compliant balloon made of different materials. The diameter of the expanded balloon 6 ranges from 0.75 to 30 mm, and the diameter of the balloon can be controlled by controlling the inflation pressure and the volume of the injected expansion agent, so as to adapt to blood vessels of different sizes and shapes. Example

[0038] Compared with the above-mentioned embodiments, the difference between the present embodiment and the above-mentioned embodiments is that the blood flow controllable perfusion balloon catheter provided by the present embodiment has two blood perfusion holes 5, and the opening area is 0.01 mm 2 . Example

[0039] Compared with the above-mentioned embodiments, the difference between the present embodiment and the above-mentioned embodiments is that the blood flow controllable perfusion balloon catheter provided by the present embodiment has 32 blood perfusion holes 5, and the opening area is 4.0 mm 2 . Example

[0040] Compared with the above-mentioned embodiments, the difference between the present embodiment and the above-mentioned embodiments is that the blood flow controllable perfusion balloon catheter provided by the present embodiment has 16 blood perfusion holes 5, and the opening area is 2.0 mm 2 . Example

[0041] Compared with the above-mentioned embodiments, the difference between the present embodiment and the above-mentioned embodiments is that the blood flow controllable perfusion balloon catheter provided by the present embodiment has 20 blood perfusion holes 5, and the opening area is 0.04 mm 2 .

[0042] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements should be encompassed within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A blood flow controllable perfusion balloon catheter comprising a catheter hub (1), a balloon (6) and a perfusion catheter (9) connected between the catheter hub (1) and the balloon (6), characterized in that, The perfusion catheter (9) is a double-lumen structure, which is composed of a guide wire lumen (2) and a perfusion lumen (3) that are independent of each other, the guide wire lumen (2) is provided with blood perfusion holes (5), and the blood perfusion holes (5) are arranged in a staggered manner in the radial direction and in parallel to the direction of the catheter in the axial direction.

2. The flow-controllable perfusion balloon catheter of claim 1, wherein, The balloon (6) is arranged at the distal end of the perfusion catheter (9) and is in communication with the perfusion lumen.

3. The flow-controllable perfusion balloon catheter of claim 1, wherein, The diameter of the guide wire lumen (2) is greater than or equal to 1.1 times the diameter of the guide wire.

4. The flow-controllable perfusion balloon catheter of claim 1, wherein, The number of the blood perfusion holes (5) is 2-32.

5. The flow-controllable perfusion balloon catheter of claim 1, wherein The opening area of a single blood perfusion hole (5) is 0.01-4.0 mm2.

6. The flow-controllable perfusion balloon catheter of claim 1, wherein, The middle of the blood perfusion holes (5) that are adjacent in the axial direction is provided with a radiographic marker point (4).

7. The flow-controllable perfusion balloon catheter of claim 6, wherein, The radiographic marker point (4) is formed by fusing tungsten, barium sulfate and bismuth hypochlorite into the perfusion catheter (9).

8. The flow-controllable perfusion balloon catheter of claim 6, wherein, The axial length of the radiographic marker point (4) is less than or equal to the distance between the blood perfusion holes (5) that are adjacent in the axial direction.

9. The flow-controllable perfusion balloon catheter of claim 1, wherein, The blood perfusion holes (5) are formed by physical drilling, chemical corrosion, laser or thermal puncture technology.

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