Cutting balloon catheter

Abstract

The utility model discloses a cutting balloon catheter which comprises a balloon body, the side surface of the balloon body is fixedly connected with a catheter inner tube, the side surface of the catheter inner tube is fixedly connected with a catheter outer tube, the outer surface of the balloon body is fixedly connected with a cutting layer, and the upper surface of the cutting layer is fixedly connected with a cutting blade. The inner side of the balloon body is fixedly connected with an upper liquid medicine cavity and a lower liquid medicine cavity, one end of the upper liquid medicine cavity and one end of the lower liquid medicine cavity are provided with liquid outlet openings, the cutting layer is arranged to be a grid body, uneven expansion of the balloon can be restrained, and the situation that blood vessels are damaged due to local expansion of the balloon is avoided; the length deformation of the balloon during expansion can be effectively inhibited through the cutting blade on the surface of the balloon, the length of the expanded balloon is kept constant, the passing ability of the balloon catheter and the contraction performance of the expanded balloon are improved, the medicine liquid cavity is formed, medicine can better permeate into lesions, and forming and recovery after blood vessels are cut are facilitated.

Description

Technical Field

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

[0002] The cutting balloon catheter is an interventional treatment developed from traditional balloon transluminal angioplasty. It utilizes a balloon with microblades to expand and cut atherosclerotic plaques from the vessel wall. It often achieves satisfactory results in narrowed vessels that are difficult to dilate with conventional balloons, such as those with calcified and fibrotic lesions.

[0003] The existing cutting balloon catheter has poor retraction performance after expansion. When the lesion is severely tortuous, retraction of the balloon may cause vascular damage. Repeated expansion and retraction will cause greater damage to the blood vessels. In addition, after the use of the existing drug balloon, the balloon may slip, fail to adhere well to the lesion, and the drug penetration of the vascular endothelium is insufficient, thereby affecting the short-term and long-term effects of the drug. For example, a Chinese patent discloses a "balloon catheter" with an application number of "CN201920317132.5", which includes: a proximal needle seat, a distal catheter and a balloon connected to the distal catheter, and a proximal needle The distal end of the seat is connected to a metal tube with a heat shrink tube on the outside, and the distal end of the metal tube is connected to the distal catheter; the distal catheter is provided with three guide wires, one of which is a guide wire that passes through the distal catheter, the outside of the balloon and the catheter tip at the distal end of the balloon, and comes out from the tubular tip; the other two guide wires are respectively passed through the inside of the distal catheter, the outside of the balloon and the catheter tip at the distal end of the balloon. After the device balloon catheter is expanded, the balloon has poor retraction performance. When the lesion is severely tortuous, retracting the balloon may cause vascular damage. Repeated expansion and retraction will cause greater damage to the blood vessels, and it does not have the application of drug-eluting balloons, and its applicability is relatively limited. Utility Model Content

[0004] The purpose of the present utility model is to solve at least one of the technical problems existing in the prior art and provide a cutting balloon catheter. The device is configured as a grid body through a cutting layer. When the grid body is coated on the periphery of the balloon, the uneven expansion of the balloon can be suppressed to avoid local expansion of the balloon and damage to the blood vessels. The cutting blades on the surface of the balloon can effectively suppress the length deformation of the balloon during expansion, so that the length of the balloon after expansion remains constant. The balloon is provided with an inward protrusion, which can effectively suppress the increase of the outer diameter, improve the passability of the balloon catheter and the contraction performance of the balloon after expansion. By setting a liquid medicine cavity, the drug can better penetrate into the lesion, which is beneficial to the shaping and recovery after cutting the blood vessel.

[0005] The present invention also provides the above-mentioned cutting balloon catheter, comprising: a balloon body, the side surface of the balloon body is fixedly connected to the catheter inner tube, the side surface of the catheter inner tube is fixedly connected to the catheter outer tube, the outer surface of the balloon body is fixedly connected to the cutting layer, the upper surface of the cutting layer is fixedly connected to the cutting blade, the upper surface of the balloon body is fixedly connected to the straight tube section, the side surface of the balloon body is fixedly connected to the tapered section, and the balloon body is composed of the straight tube section and the tapered sections at both ends; through the mutual cooperation between the above-mentioned parts, the length deformation of the balloon during expansion can be effectively suppressed, so that the length of the balloon after expansion is kept constant, the balloon is provided with an inward protrusion, which can effectively suppress the increase of the outer diameter, improve the passability of the balloon catheter and the contraction performance of the balloon after expansion.

[0006] The inner side of the balloon body is fixedly connected to an upper drug liquid chamber and a lower drug liquid chamber, each of which has a liquid outlet opening at one end. The interaction between the above parts allows the drug to better penetrate into the lesion, facilitating the shaping and recovery of the blood vessel after cutting.

[0007] According to the cutting balloon catheter described in the utility model, the cutting layer is a mesh layer formed by a plurality of interlaced cutting wires, and the cutting layer is provided on the outer surface of the balloon body. Through the interaction between these parts, uneven expansion of the balloon can be suppressed to prevent local expansion of the balloon from damaging blood vessels.

[0008] According to the cutting balloon catheter of the present invention, the balloon body is configured as a cylinder, the inner end of the balloon body is connected to the inner end of the catheter inner tube, and the outer end of the balloon body is fixedly connected to the catheter tip. The mutual cooperation between the above parts facilitates connection.

[0009] According to the cutting balloon catheter described in the present invention, the inner surface of the balloon body is fixedly connected to a pair of symmetrically arranged developing marker rings. The interaction between these components facilitates the positioning of the balloon body under X-ray irradiation, thereby facilitating the positioning of the balloon body at the treatment site.

[0010] According to the cutting balloon catheter of the present invention, one end of the outer tube of the catheter is fixedly connected to a push rod, and the side surface of the push rod is fixedly connected to a catheter seat. The mutual cooperation between the above parts facilitates the push rod to push the outer tube of the catheter.

[0011] According to the cutting balloon catheter of the present invention, the upper surface of the catheter seat is fixedly connected to the expansion nozzle, and the side surface of the catheter seat is fixedly connected to the guide wire nozzle. The mutual cooperation between the above parts facilitates the use in conjunction with other medical instruments.

[0012] According to the cutting balloon catheter of the present invention, the cutting blade is composed of an outer spinous process strip and an inner spinous process strip, and the cross-section of the cutting blade is triangular. Through the mutual cooperation between the above parts, the outer profile is made smaller, the length deformation of the balloon is reduced, and the retraction performance is improved.

[0013] According to the cutting balloon catheter of the present invention, the outer surfaces of the push rod and the outer tube of the catheter are both coated with a lubricating coating. The mutual cooperation between the above parts can reduce the friction generated when the push rod enters or withdraws from the human body.

[0014] Beneficial effects

[0015] Compared with the prior art, the present invention sets the cutting layer as a grid body, which can suppress the uneven expansion of the balloon when it is covered on the periphery of the balloon to avoid local expansion of the balloon and damage to the blood vessels. The cutting blades on the surface of the balloon can effectively suppress the length deformation of the balloon during expansion, so that the length of the balloon after expansion remains constant. The balloon is provided with an inward protrusion, which can effectively suppress the increase of the outer diameter, improve the passability of the balloon catheter and the contraction performance of the balloon after expansion. By setting up a liquid medicine cavity, the drug can better penetrate into the lesion, which is beneficial to the shaping and recovery after cutting the blood vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is the overall structural diagram of the cutting balloon catheter of the utility model;

[0018] Figure 2 This is a partial structural diagram of the cutting balloon catheter of the utility model;

[0019] Figure 3 This is a diagram of the internal structure of the cutting balloon catheter of the present invention;

[0020] Figure 4 This is a side sectional view of the cutting balloon catheter of the present invention;

[0021] Figure 5 This is a cross-sectional structural diagram of the cutting balloon catheter of the present invention.

[0022] Legend:

[0023] 1. Balloon body; 2. Inner tube of catheter; 3. Cutting layer; 4. Catheter seat; 5. Guidewire opening; 6. Dilation opening; 7. Push rod; 8. Outer tube of catheter; 9. Catheter tip; 10. Cutting blade; 11. Development marker ring; 12. Straight tube section; 13. Tapered section; 14. Upper drug solution chamber; 15. Lower drug solution chamber. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0025] Reference Figure 1-5 The present invention provides a cutting balloon catheter, which includes: a balloon body 1, an inner surface of the balloon body 1 is fixedly connected with a developing marker ring 11, and the developing marker ring 11 is provided with two groups and symmetrically arranged, so as to improve the positioning of the balloon body 1 under X-ray irradiation, thereby facilitating the positioning of the treatment site of the balloon body 1, the balloon body 1 is configured as a cylinder, the inner end of the balloon body 1 is connected to the inner end of the catheter inner tube 2, and the outer end of the balloon body 1 is fixedly connected with a catheter tip 9 for easy connection, the side surface of the balloon body 1 is fixedly connected with the catheter inner tube 2, the side surface of the catheter inner tube 2 is fixedly connected with the catheter outer tube 8, and one end of the catheter outer tube 8 is fixedly connected with a pushing rod 7, and the outer surfaces of the pushing rod 7 and the catheter outer tube 8 are both coated with a lubricating coating to reduce the friction generated when the pushing rod 7 enters or withdraws from the human body, the side surface of the pushing rod 7 is fixedly connected with the catheter seat 4, so that the pushing rod 7 can push the catheter outer tube 8, and the upper surface of the catheter seat 4 is fixedly connected with the expansion tube mouth 6, the catheter The side surface of the seat 4 is fixedly connected with a guide wire tube port 5, which is convenient for use with other medical devices. The outer surface of the balloon body 1 is fixedly connected with a cutting layer 3. The cutting layer 3 is a grid layer formed by a plurality of cutting wires interlaced. The cutting layer 3 is coated on the outer surface of the balloon body 1, which can suppress the uneven expansion of the balloon to avoid local expansion of the balloon and damage to the blood vessels. The upper surface of the cutting layer 3 is fixedly connected with a cutting blade 10. The cutting blade 10 is composed of an outer spinous process bar and an inner spinous process bar. The cross-section of the cutting blade 10 is triangular, which makes the outer contour smaller, the balloon length deformation is smaller, and the retraction performance is better. The upper surface of the balloon body 1 is fixedly connected with a straight tube section 12, and the side surface of the balloon body 1 is fixedly connected with a tapered section 13. The balloon body 1 is composed of a straight tube section 12 and tapered sections 13 at both ends, which can effectively suppress the length deformation of the balloon during expansion, so that the length of the balloon after expansion remains constant. The balloon is provided with an inward protrusion, which can effectively suppress the increase of the outer diameter, improve the passability of the balloon catheter and the contraction performance after balloon expansion.

[0026] The inner side of the balloon body 1 is fixedly connected with an upper drug liquid chamber 14 and a lower drug liquid chamber 15. One end of the upper drug liquid chamber 14 and the lower drug liquid chamber 15 is provided with a liquid outlet opening, so that the drug can better penetrate into the lesion, which is beneficial to the shaping and recovery after cutting the blood vessel.

[0027] Working principle: When using this device, first remove the cutting balloon catheter from the packaging container in a sterile manner, disassemble the protective hose and other protective components, and check whether there is any damage, carefully check the balloon head, observe the position of the guide wire attached to the balloon surface, whether there is any deviation and leakage of the guide wire head, etc. Try to avoid touching the balloon surface with your hands during the process, insert the guide wire into the guide catheter through the puncture port, and confirm that the guide wire passes through the target stenosis and reaches the distal end of the blood vessel. Secondly, the medical staff can inflate the expansion cavity through the expansion tube port 6, and the expansion tube port 6 and the guide wire tube port 5 are independent of each other. There is no need to close the guide wire tube port 5 in the inflation expansion chamber. By inflating the catheter outer tube 8, the balloon body 1 is inside the vascular lesion. Rapid expansion. After the balloon body 1 expands, it drives the cutting blade 10 of the cutting layer 3 to cut the hardened lesions, so as to dredge the blood vessels. A pair of developing marker rings 11 are symmetrically provided on the inner side of the balloon body 1. The developing marker rings 11 are used to improve the positioning of the balloon body 1 under X-ray irradiation, thereby facilitating the positioning of the treatment site of the balloon body 1. The straight tube section 12 and the two tapered sections 13 of the balloon body 1 are smoothly connected in a tilted manner relative to the axial direction of the balloon body 1. When the cutting balloon reaches the target site, the rated pressure is used to slowly expand the balloon so that the balloon surface is as close to the blood vessel wall as possible, and the cutting guide wire on the balloon surface is within the plaque load, which is conducive to the penetration of drugs into the blood vessel wall.

[0028] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A cutting balloon catheter, characterized in that: include: A balloon body (1), wherein the side surface of the balloon body (1) is fixedly connected to a catheter inner tube (2), the side surface of the catheter inner tube (2) is fixedly connected to a catheter outer tube (8), the outer surface of the balloon body (1) is fixedly connected to a cutting layer (3), the upper surface of the cutting layer (3) is fixedly connected to a cutting blade (10), the upper surface of the balloon body (1) is fixedly connected to a straight tube section (12), the side surface of the balloon body (1) is fixedly connected to a tapered section (13), and the balloon body (1) is composed of the straight tube section (12) and the tapered sections (13) at both ends; An upper drug liquid chamber (14) and a lower drug liquid chamber (15) are fixedly connected to the inner side of the balloon body (1), and one end of each of the upper drug liquid chamber (14) and the lower drug liquid chamber (15) is provided with a liquid outlet opening.

2. A cutting balloon catheter according to claim 1, characterized in that: The cutting layer (3) is a grid layer formed by interlacing a plurality of cutting wires, and the cutting layer (3) is coated on the outer surface of the balloon body (1).

3. The cutting balloon catheter according to claim 1, characterized in that: The balloon body (1) is configured as a cylinder, the inner end of the balloon body (1) is connected to the inner end of the catheter inner tube (2), and the outer end of the balloon body (1) is fixedly connected to the catheter tip (9).

4. The cutting balloon catheter according to claim 1, characterized in that: The inner surface of the balloon body (1) is fixedly connected with a developing marker ring (11), and the developing marker ring (11) is provided in two groups and is symmetrically arranged.

5. The cutting balloon catheter according to claim 1, characterized in that: One end of the catheter outer tube (8) is fixedly connected to a push rod (7), and the side surface of the push rod (7) is fixedly connected to a catheter seat (4).

6. The cutting balloon catheter according to claim 5, characterized in that: The upper surface of the catheter seat (4) is fixedly connected to an expansion tube opening (6), and the side surface of the catheter seat (4) is fixedly connected to a guide wire tube opening (5).

7. The cutting balloon catheter according to claim 1, characterized in that: The cutting blade (10) consists of an outer spinous process bar and an inner spinous process bar, and the cross section of the cutting blade (10) is triangular.

8. The cutting balloon catheter according to claim 5, characterized in that: The outer surfaces of the push rod (7) and the catheter outer tube (8) are both coated with a lubricating coating.

Images