Balloon cutting device and balloon dilation catheter

Abstract

The utility model discloses balloon cutting device and balloon dilatation catheter belong to vascular pathological change interventional therapy medical instrument technical field, balloon cutting device includes balloon structure, cutting structure and flexible wire body, balloon structure has expansion state and contraction state, balloon structure is under expansion state, and cutting structure sets up at the outer surface of balloon structure, a plurality of cutting structures are along the radial interval arrangement of balloon structure, a plurality of cutting structures are along the interval arrangement of balloon structure periphery, and the flexible wire body is connected between adjacent cutting structures, balloon structure is under contraction state, and the flexible wire body is in slack state, balloon structure is under expansion state, and the flexible wire body is in taut state, the utility model balloon all cutting structures are connected as a whole through the flexible wire body, and the cutting force between a certain cutting structure and vascular pathological change can be provided by all cutting structures and balloon structure, reach to strengthen the cutting force of cutting structure, strengthen the cutting effect to vascular pathological change.

Description

Technical Field

[0001] This utility model relates to a balloon cutting device and a balloon dilation catheter, belonging to the field of medical device technology for interventional treatment of vascular lesions. Background Technology

[0002] For the treatment of vascular blockages and lesions, interventional therapy is the most commonly used technique currently available. A cutting balloon is used to cut the narrowed area of ​​the vascular lesion, and after the cutting is complete, a vascular stent is implanted to support the blood vessel.

[0003] In existing balloon cutting techniques, most methods involve using cutting tools to cut the narrowed areas of blood vessels. The cutting force of the cutting tool is provided by the balloon and the cutting tool. However, there are multiple cutting tools distributed on the outer surface of the balloon. The cutting force provided to each cutting tool is limited. Furthermore, when cutting hard blood vessel lesions, which requires greater cutting force, it may cause deformation of the balloon or the cutting tool to fall out of the balloon, seriously affecting the cutting quality of the blood vessel lesion and causing surgical failure.

[0004] Therefore, existing cutting balloons need to be improved to provide greater cutting force. Utility Model Content

[0005] This invention addresses the problem of insufficient cutting force in existing balloon cutting tools. By improving the structural design, it provides a cutting tool with greater cutting force.

[0006] Specifically, the balloon cutting device provided by this utility model includes a balloon structure, a cutting structure, and a flexible thread;

[0007] The cyst structure has both an expanded and a contracted state;

[0008] When the capsule structure is in an expanded state, the cutting structure is set on the outer surface of the capsule structure;

[0009] Several cutting structures are arranged at intervals along the radial direction of the capsule structure, and several cutting structures are arranged at intervals along the circumferential direction of the capsule structure;

[0010] Flexible lines connect adjacent cut structures;

[0011] When the capsule structure is in a contracted state, the flexible filaments are in a relaxed state;

[0012] When the capsule structure is in an expanded state, the flexible filaments are in a taut state.

[0013] Preferably, the cutting structure includes a base plate and a cutting plate;

[0014] The lower surface of the base plate is fixed to the capsule structure, and a cutting plate is set on the upper surface of the base plate.

[0015] Even better, two flexible lines are connected between adjacent cut structures.

[0016] Preferably, the cutting plate is positioned in the middle of the base plate;

[0017] The base plate has four connecting holes, which are symmetrically distributed on both sides of the cutting plate in pairs.

[0018] Preferably, the cutting plate includes a support and a cutting body, with the cutting body disposed at the top of the support.

[0019] Even better, the cutting body is in two rows of sharp points.

[0020] Even better, the cut body should be sharp at multiple angles.

[0021] Even better, the cut body has a serrated structure.

[0022] Preferably, the cutting structure includes a base plate and a cutting pin;

[0023] The lower surface of the base plate is fixed to the capsule structure, and several cutting needles are set on the upper surface of the base plate.

[0024] This utility model also claims protection for balloon dilation catheters made using balloon cutting devices.

[0025] This novel balloon cutting device utilizes flexible filaments connecting adjacent cutting structures. When the balloon structure is contracted, the flexible filaments are relaxed, thus allowing the balloon cutting device to pass through the narrowed areas of the vascular lesion. Once the balloon cutting device reaches the narrowed area, the balloon structure expands, and the flexible filaments become taut. In this way, all cutting structures are connected as a whole by the flexible filaments, and the cutting force between a particular cutting structure and the vascular lesion can be provided by all the cutting structures and the balloon structure, thereby enhancing the cutting force of the cutting structure. Attached Figure Description

[0026] Figure 1 This is a front view of the balloon cutting device;

[0027] Figure 2 for Figure 1 A partial schematic diagram of the balloon cutting device;

[0028] Figure 3 This is a side view of the cut structure of the capsule structure in its expanded state.

[0029] Figure 4 This is a schematic diagram of Embodiment 1 of the cutting structure;

[0030] Figure 5 This is a schematic diagram of Embodiment 1 of the cutting plate;

[0031] Figure 6 This is a schematic diagram of the second embodiment of the cutting plate;

[0032] Figure 7 for Figure 6 Enlarged view of the location indicated by A in the middle;

[0033] Figure 8 This is a schematic diagram of embodiment two of the cutting structure.

[0034] Figure label:

[0035] 100 - Balloon cutting device; 1 - Balloon structure;

[0036] 2-Cutting structure, 21-Base plate, 22-Cutting plate, 23-Cutting needle, 211-Connecting hole, 221-Support part, 222-Cutting body;

[0037] 3- Flexible line body. Detailed Implementation

[0038] 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.

[0039] Please refer to Figure 1-3 The balloon cutting device 100 of this utility model includes a balloon structure 1, a cutting structure 2, and a flexible wire 3. The balloon structure 1 has an expanded state and a contracted state. In the expanded state, the cutting structure 2 is disposed on the outer surface of the balloon structure 1. Several cutting structures 2 are arranged radially and circumferentially along the balloon structure 1. The flexible wire 3 connects adjacent cutting structures 2.

[0040] More importantly, when the capsule structure 1 is in a contracted state, the flexible thread 3 is in a relaxed state; when the capsule structure 1 is in an expanded state, the flexible thread 3 is in a taut state.

[0041] The balloon structure 1 of the present invention, in a contracted state, passes through the narrowed part of the vascular lesion in the balloon cutting device 100.

[0042] The balloon cutting device 100 uses flexible threads 3 connected between adjacent cutting structures 2. When the balloon structure 1 is in a contracted state, the flexible threads 3 are in a relaxed state, thus the flexible threads 3 do not affect the passage of the balloon cutting device 100 through the narrowed area of ​​the vascular lesion. When the balloon cutting device 100 reaches the narrowed area of ​​the vascular lesion, the balloon structure 1 is in an expanded state, and the flexible threads 3 are in a taut state. In this way, all the cutting structures 2 are connected into a whole through the flexible threads 3, and the cutting force between a certain cutting structure 2 and the vascular lesion can be provided by all the cutting structures 2 and the balloon structure 1, thereby enhancing the cutting force of the cutting structure 2.

[0043] For the specific method of connecting the flexible line 3 between adjacent cutting structures 2, please refer to the appendix. Figure 2 and Figure 4 The cutting structure 2 includes a base plate 21 and a cutting plate 22. The lower surface of the base plate 21 is fixed to the capsule structure 1, and the cutting plate 22 is disposed on the upper surface of the base plate 21. The base plate 21 and the capsule structure 1 can be fixed by means of bonding or other methods. The base plate 21 has four connecting holes 211, and the connecting holes 211 are symmetrically distributed on both sides of the cutting plate 22 in pairs.

[0044] Two flexible wires 3 connect adjacent cutting structures 2. Specifically, one end of the flexible wire 3 is fixed to the connecting hole 211 provided in the base plate 21, so that all cutting structures 2 are connected into a whole. When a cutting structure 2 cuts the narrow part of a vascular lesion, the adjacent cutting structures 2 can all provide cutting force due to the connection of the flexible wires 3.

[0045] For the specific structure of cutting structure 2, please refer to... Figure 4-7 The cutting structure 2 includes a base plate 21 and a cutting plate 22, with the cutting plate 22 disposed in the middle of the base plate 21. The cutting plate 22 includes a support portion 221 and a cutting body 222, with the cutting body 222 disposed at the top of the support portion 221.

[0046] The cutting body 222 is primarily used for cutting vascular lesions, requiring a better-designed cutting shape. Figure 5 In the middle, the cutting body 222 is arranged in two rows of sharp points. Figure 6-7 In this design, the cutting element is sharp at multiple angles. This allows for efficient cutting of vascular lesions. Alternatively, the cutting element 222 can also have a serrated structure (not shown).

[0047] In another embodiment, the cutting structure 2 includes a base plate 21 and cutting needles 23. In this case, the lower surface of the base plate 21 is fixed to the capsule structure 1, and a plurality of cutting needles 23 are disposed on the upper surface of the base plate 21. The cutting needles 23 can puncture the vascular lesion before cutting.

[0048] This utility model also claims protection for a balloon dilation catheter prepared using a balloon cutting device 100.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A balloon cutting device, characterized in that, It includes cystic structures, cutting structures, and flexible filaments; the cystic structure has both expanded and contracted states; When the capsule structure is in an expanded state, the cutting structure is set on the outer surface of the capsule structure; Several cutting structures are arranged at intervals along the radial direction of the capsule structure, and several cutting structures are arranged at intervals along the circumferential direction of the capsule structure; Flexible lines connect adjacent cut structures; When the capsule structure is in a contracted state, the flexible filaments are in a relaxed state; When the capsule structure is in an expanded state, the flexible filaments are in a taut state.

2. The balloon cutting device according to claim 1, characterized in that, The cutting structure includes a base plate and a cutting plate; The lower surface of the base plate is fixed to the capsule structure, and a cutting plate is set on the upper surface of the base plate.

3. The balloon cutting device according to claim 2, characterized in that, Two flexible lines connect adjacent cut structures.

4. The balloon cutting device according to claim 3, characterized in that, The cutting plate is located in the middle of the base plate; The base plate has four connecting holes, which are symmetrically distributed on both sides of the cutting plate in pairs.

5. The balloon cutting device according to claim 2, characterized in that, The cutting plate includes a support and a cutting body, with the cutting body located at the top of the support.

6. The balloon cutting device according to claim 5, characterized in that, The cut body is in two rows of sharp points.

7. The balloon cutting device according to claim 5, characterized in that, The cut object is sharp at multiple angles.

8. The balloon cutting device according to claim 5, characterized in that, The cut body has a serrated structure.

9. The balloon cutting device according to claim 1, characterized in that, The cutting structure includes a base plate and cutting pins; The lower surface of the base plate is fixed to the capsule structure, and several cutting needles are set on the upper surface of the base plate.

10. A balloon dilation catheter, characterized in that, Includes the balloon cutting device according to any one of claims 1-9.

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