Balloon dilatation catheter and blade carried by balloon dilatation catheter

Abstract

The utility model discloses a balloon dilatation catheter and a blade carried by the balloon dilatation catheter, and relates to the technical field of medical instruments. According to the blades carried by the balloon dilatation catheter, a plurality of blade bodies are linear sheet bodies, the first sides of the blade bodies are cutting parts used for cutting human tissue, and the second sides of the blade bodies are blade backs; the flexible connecting part is of a bendable structure, the multiple blade bodies are collinear and arranged at intervals, and the close ends of the adjacent blade bodies are connected through the flexible connecting part, so that the adjacent blade bodies can move face to face or away from each other, and the blade carried by the balloon dilatation catheter has a certain expansion amount; most of stretching and contraction of the blade carried by the balloon dilatation catheter in the turning process can be resolved through the flexible connecting part, rigid folding deformation can be effectively avoided, and the blade carried by the balloon dilatation catheter can pass non-angulation lesions not exceeding 45 degrees. The trafficability of the blade carried by the balloon dilatation catheter passing through tortuous blood vessels is high.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to a blade mounted on a balloon dilation catheter. Furthermore, this utility model also relates to a balloon dilation catheter including the aforementioned blade. Background Technology

[0002] Atherosclerotic lesions in blood vessels can cause narrowing of blood vessels, leading to insufficient blood supply. Currently, balloon angioplasty is commonly used. A balloon is inserted through a catheter to the narrowed blood vessel, and then the balloon is inflated to dilate the narrowed area of ​​the blood vessel, thereby restoring blood flow.

[0003] When a regular balloon dilates a vascular lesion, it simply opens the blood vessel. This process can lead to irregular tearing of the blood vessel, which can easily cause vascular dissection. Therefore, a balloon dilation catheter with a blade mounted on the balloon has gradually emerged. However, during clinical trials, it was found that this balloon dilation catheter has poor passage through tortuous blood vessels and is prone to rigid bending.

[0004] In summary, improving the passage of balloon dilation catheters through tortuous blood vessels is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a blade mounted on a balloon dilation catheter, which has high passability through tortuous blood vessels.

[0006] Another objective of this invention is to provide a balloon dilation catheter comprising the aforementioned blade.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A blade mounted on a balloon dilation catheter includes:

[0009] The blade body is a linear blade, with a first side being a cutting section for cutting human tissue and a second side being the blade back.

[0010] The flexible connecting part is a bendable structure. Several blade bodies are arranged at intervals and their cutting parts are collinear. The adjacent ends of adjacent blade bodies are connected by the flexible connecting part, so that adjacent blade bodies can move towards or away from each other.

[0011] Preferably, the flexible connection portion includes a plurality of bent portions, which are connected sequentially.

[0012] Preferably, the connection positions of adjacent bends have a first rounded corner structure on the same side.

[0013] Preferably, the number of the bent portions in one of the flexible connecting portions is two or three.

[0014] Preferably, the adjacent ends of the adjacent blade bodies each have a cutting compensation portion, such that the opening width of the adjacent blade bodies on the cutting portion side is smaller than the opening width on the blade back side.

[0015] Preferably, the opening width of the adjacent blade body on the cutting side is in the range of 0.1-3mm.

[0016] Preferably, the corner position on one side of the blade body has a second rounded corner structure.

[0017] Preferably, the blade mounted on the balloon dilation catheter is an integral structural component.

[0018] A balloon dilation catheter includes a handle assembly, a catheter, a gas conduit, and a balloon, and further includes a blade mounted on the balloon dilation catheter as described in any one of the preceding claims, the blade being adhered to the outer peripheral surface of the balloon and extending along the length of the balloon.

[0019] Preferably, several of the blades are evenly arranged around the center line of the balloon.

[0020] The blade mounted on the balloon dilation catheter provided by this utility model has a linear blade body, with one side of the blade body being a cutting section for cutting human tissue and the other side being a blade back for fixed connection with the balloon. Correspondingly, several blade bodies are arranged collinearly and at intervals, with adjacent blade bodies having their near ends fixedly connected by corresponding flexible connecting parts. These flexible connecting parts can extend and retract along the length of the blade body, allowing adjacent blade bodies to move towards or away from each other. Therefore, the blade mounted on the balloon dilation catheter has a certain amount of extension and retraction. Most of the stretching and contraction experienced by the blade during bending can be resolved by the flexible connecting parts, effectively preventing rigid folding and deformation. Thus, the blade mounted on the balloon dilation catheter can pass through non-angular lesions not exceeding 45°. In summary, the blade mounted on the balloon dilation catheter has high passability through tortuous blood vessels. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 A front view of the blade in a specific embodiment of this utility model;

[0023] Figure 2 Another front view of the blade provided in a specific embodiment of this utility model;

[0024] Figure 3 This is a schematic diagram of the balloon dilation catheter provided in a specific embodiment of the present invention.

[0025] Figure label:

[0026] 1-Blade body; 11-Cutting compensation part; 2-Flexible connection part; 21-Bending part; 3-First rounded corner structure;

[0027] 10-Blade; 20-Handle assembly; 30-Catheter; 40-Gas tubing; 50-Balloon. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] The core of this invention is to provide a blade mounted on a balloon dilation catheter, which has high permeability through tortuous blood vessels. Another core aspect of this invention is to provide a balloon dilation catheter including the aforementioned blade.

[0030] Please refer to Figure 1 This invention provides a blade mounted on a balloon dilation catheter, comprising a flexible connecting part 2 and several blade bodies 1. The blade bodies 1 are linear blades, with a first side for cutting human tissue and a second side as a blade back. The flexible connecting part 2 is a bendable structure. The blade bodies 1 are arranged at intervals with collinear cutting parts, and adjacent ends of adjacent blade bodies 1 are connected by the flexible connecting part 2, allowing adjacent blade bodies 1 to move towards or away from each other.

[0031] like Figures 1 to 3As shown, the blade body 1 is a linear blade with a cutting section on the upper side for cutting human tissue. The lower side of the blade body 1 is the blade back for fixed connection with the balloon 50. It should be noted that the type of blade body 1 is not limited, as long as it can achieve the above functions. For example, the blade body 1 can adopt a trapezoidal or triangular cross-sectional structure. Correspondingly, the cutting sections of several blade bodies 1 arranged at intervals are collinear. The adjacent ends of two adjacent blade bodies 1 are fixedly connected by corresponding flexible connecting parts 2. The flexible connecting parts 2 can extend and retract along the length of the blade body 1, allowing adjacent blade bodies 1 to move towards or away from each other. Thus, the blade carried by the balloon dilation catheter has a certain amount of extension and retraction. Most of the stretching and contraction experienced by the blade during bending can be resolved by the flexible connecting parts 2, effectively avoiding rigid folding deformation. Therefore, the blade carried by the balloon dilation catheter can pass through non-angular lesions of no more than 45°. In summary, the blade carried by the balloon dilation catheter has high passability through tortuous blood vessels.

[0032] It should be noted that the connection method between the blade body 1 and the flexible connecting part 2 is not limited, as long as a fixed connection can be achieved. For example, in some specific embodiments, the two can be fixedly connected by bonding or laser welding. Preferably, in other specific embodiments, the blade mounted on the balloon dilation catheter, in which several blade bodies 1 and flexible connecting parts 2 are connected as one piece, is an integral structural component. It should also be noted that the number of blade bodies 1 and flexible connecting parts 2 is not limited, as long as the above connection requirements can be met.

[0033] Based on the above embodiments, the flexible connection part 2 includes a plurality of bent parts 21, which are connected in sequence.

[0034] like Figures 1 to 3 As shown, the flexible connecting part 2 is composed of several bent parts 21 connected end to end. The bent parts 21 can be linear sheets or wavy sheets, etc., and in the natural state, the included angle between adjacent bent parts 21 is not a flat angle, that is, the angle range between adjacent bent parts 21 is 0°<α<180°. For example, α can be 45 degrees, 60 degrees, 80 degrees, or 135 degrees, etc., to form a flexible connecting part 2 with a sawtooth structure or a wavy structure. The flexible connecting part 2 has a strong expansion and contraction capability.

[0035] Based on the above embodiment, the connection positions of adjacent bends 21 have a first rounded corner structure 3 on the same side.

[0036] like Figures 1 to 3As shown, at the ends of adjacent bends 21 that are close to each other, the inner sides that are close to each other are transitioned by the first rounded corner structure 3, and the outer sides that are far apart are also transitioned by the first rounded corner structure 3, so that the stress concentration of the flexible connection 2 is low, and the fatigue resistance of the flexible connection 2 is strong.

[0037] Based on the above embodiments, if the number of bending portions 21 in a flexible connection portion 2 is two or three, then the flexible connection portion 2 is V-shaped or N-shaped, and the structure of the flexible connection portion 2 is simple.

[0038] Based on the above embodiment, the adjacent ends of the adjacent blade bodies 1 each have a cutting compensation portion 11, so that the opening width of the adjacent blade bodies 1 on the cutting portion side is smaller than the opening width on the blade back side.

[0039] like Figures 1 to 3 As shown, the blade body 1 has a cutting compensation section 11 at both ends along its own length direction, which extends along the length direction of the blade body 1 and protrudes from the side of the cutting section. The cutting compensation section 11 can be a rectangular plate or a triangular plate, etc., so as to ensure the passability of the blade mounted on the balloon dilation catheter while facilitating the extension of the cutting length of the blade mounted on the balloon dilation catheter.

[0040] Based on the above embodiment, the opening width of the adjacent blade body 1 on the cutting side is in the range of 0.1-3mm. This setting ensures the passability of the blade mounted on the balloon dilation catheter while also ensuring the cutting performance of the blade mounted on the balloon dilation catheter.

[0041] In addition to the blade mounted on the balloon dilation catheter described above, this utility model also provides a balloon dilation catheter including the blade 10 disclosed in the above embodiments, and further including a handle assembly 20, a catheter 30, a gas conduit 40 and a balloon 50. The blade 10 is attached to the outer peripheral surface of the balloon 50 and extends along the length direction of the balloon 50 so that the blade 10 can cut human tissue at the target location while the balloon dilation catheter is moved along its own length direction.

[0042] Based on the above embodiment, several blades 10 are evenly arranged around the center line of the balloon 50. This arrangement facilitates the adjustment of the position of the balloon 50 dilation catheter 30 to cut human tissue at the target location.

[0043] It should be noted that the number and arrangement of the blades 10 mounted on the balloon 50 are not limited, as long as the cutting requirements can be met. For example, in some specific embodiments, the number of blades 10 is greater than or equal to two, and several blades 10 are evenly arranged around the center line of the balloon 50.

[0044] It should be noted that the relational terms such as "first" and "second" mentioned above are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities; the terms "upper surface," "lower surface," "top," and "bottom" and the directional terms "upper," "lower," "left," and "right" mentioned above are defined based on the accompanying drawings in the specification.

[0045] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0046] The balloon dilation catheter and its mounted blade provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A blade mounted on a balloon dilation catheter, characterized in that, include: The blade body (1) is a linear blade, and the first side of the blade body (1) is a cutting part for cutting human tissue, and the second side is the back of the blade. The flexible connecting part (2) is a bendable structure. Several blade bodies (1) are arranged at intervals and the cutting parts are collinear. The adjacent ends of adjacent blade bodies (1) are connected by the flexible connecting part (2), so that adjacent blade bodies (1) can move towards each other or away from each other.

2. The balloon catheter-mounted blade of claim 1, wherein, The flexible connection part (2) includes a plurality of bending parts (21), and the plurality of bending parts (21) are connected in sequence.

3. The balloon catheter-mounted blade of claim 2, wherein, The connection positions of adjacent bending portions (21) have a first rounded corner structure (3) on the same side.

4. The balloon catheter-mounted blade of claim 2, wherein, The number of the bending portions (21) in one of the flexible connecting portions (2) is two or three.

5. The balloon catheter-mounted blade of claim 2, wherein, Each of the adjacent blade bodies (1) has a cutting compensation portion (11) at its close end, such that the opening width of the adjacent blade body (1) on the cutting portion side is smaller than the opening width on the blade back side.

6. The balloon catheter-mounted blade of claim 5, wherein, The opening width of the adjacent blade body (1) on the cutting side ranges from 0.1 to 3 mm.

7. The balloon catheter-mounted blade of any one of claims 1 to 6, wherein, The blade mounted on the balloon dilation catheter is a one-piece structure.

8. A balloon dilatation catheter comprising a handle assembly (20), a catheter (30), a gas conduit (40) and a balloon (50), characterized in that It also includes a blade mounted on the balloon dilation catheter according to any one of claims 1-7, the blade (10) being adhered to the outer peripheral surface of the balloon (50) and the blade (10) extending along the length direction of the balloon (50).

9. The balloon dilatation catheter of claim 8, wherein, Several blades (10) are evenly arranged around the center line of the balloon (50).

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