Split type below-knee intravascular stent and using method

Abstract

The invention discloses a split type below-knee intravascular stent and a using method, the intravascular stent comprises a plurality of stent split bodies which are in a spiral shape in the length direction of the stent, each stent split body comprises a plurality of split body units, and the split body units are sequentially arranged in the length direction of the intravascular stent; the adjacent split units are arranged in a staggered mode in the circumferential direction of the intravascular stent according to the same interval angle, and the split units of the same stent split body are connected through telescopic pieces to jointly form a spiral structure. Between the split units of the adjacent support split bodies, the end parts of the split units at the same circumferential position are connected and assembled through detachable connecting buckles to form a complete closed-loop structure; the stent is split and spliced to form an intravascular stent structure, after assembly and implantation are completed, the shape of the intravascular stent can be adjusted in a blood vessel, then shaping and fixing are conducted, adjustment can be correspondingly conducted according to the shape of the blood vessel, and the treatment effect is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of vascular stents, and in particular to a split below-the-knee vascular stent and a use method thereof. Background Art

[0002] The treatment of below-the-knee vascular disease is a complex and technically demanding field, and existing treatment methods include medication, angioplasty, and stent implantation. However, traditional stent implantation methods face problems such as complex operation, poor adaptability, and long patient recovery time. They cannot be adjusted according to the vascular morphology of different patients and are prone to damage to the vascular wall during implantation. Summary of the invention

[0003] Technical purpose: In view of the shortcomings of the above-mentioned existing vascular stents, the present invention discloses a split below-the-knee vascular stent and a method of use.

[0004] Technical solution: To achieve the above technical objectives, the present invention adopts the following technical solution: A split below-the-knee vascular stent comprises a plurality of stent splits in a spiral shape along the length direction of the stent, the stent splits comprising a plurality of split units, the split units being arranged in sequence along the length direction of the vascular stent, adjacent split units being mutually staggered at the same interval angle in the circumferential direction of the vascular stent, the split units of the same stent split being connected by telescopic parts to form a spiral structure together; between the split units of adjacent stent splits, the ends of the split units at the same circumferential position are connected and assembled by detachable connecting buckles to form a complete closed-loop structure.

[0005] Preferably, the split unit of the present invention adopts a wavy structure that can be expanded and contracted along the circumferential direction of the vascular stent to adjust the radial size of the vascular stent.

[0006] Preferably, the connecting buckle of the present invention comprises a connecting buckle female buckle provided with a card slot and a connecting buckle male buckle provided with a connecting protrusion matching with the card slot. The connecting buckle male buckle and the connecting buckle female buckle are respectively arranged at both ends of the split units to connect adjacent split units. When connecting, the vascular stent is fine-tuned by controlling the connection overlap length of the connecting buckle male buckle and the connecting buckle female buckle.

[0007] Preferably, the male buckle and the female buckle of the connecting buckle of the present invention are relatively fixed using biocompatible medical glue or a bioactive coating that cures at body temperature.

[0008] Preferably, the telescopic member of the present invention adopts an S-shaped structure, and both ends of the telescopic member are respectively connected to the crests of the split unit.

[0009] The present invention discloses a method for using the above-mentioned split below-the-knee vascular stent, in which the stent parts of the vascular stent are assembled through connecting buckles, the assembled vascular stent is implanted, and the shape of the vascular stent is adjusted according to the implantation position, and finally the connecting ends of the male buckle and the female buckle of the connecting buckle are glued and fixed to complete the shaping of the vascular stent.

[0010] Preferably, the process of adjusting the shape of the vascular stent according to the implantation position of the present invention includes: pulling the split unit, adjusting the radial size of the stent through the wavy structure of the split unit, adjusting the axial length of the stent through the telescopic member, and fine-tuning the surface shape of the vascular stent through the matching position of the connecting buckle female buckle and the connecting buckle male buckle at the connection between the stent splits, so that the outer shape of the vascular stent matches the profile requirements of the implantation position.

[0011] Beneficial effects: The split below-the-knee vascular stent and the use method disclosed in the present invention have the following effects: 1. The present invention uses split stents to splice together to form a vascular stent structure. After assembly and implantation, the shape of the vascular stent can be adjusted in the blood vessel and then fixed. It can be adjusted according to the shape of the blood vessel to ensure the treatment effect.

[0012] 2. The split unit of the present invention adopts a wavy structure, which enables the vascular stent to have radial deformation ability and can reduce the damage of the stent to the blood vessel wall during the implantation of the vascular stent.

[0013] 3. The connecting buckle of the present invention uses a male and female buckle for connection, and the matching position of the connection can be adjusted to achieve fine-tuning of the shape of the vascular stent, so that the stent can be customized according to the patient's specific vascular morphology. The adjustment is simple, which is conducive to simplifying the surgical process and reducing the operation time and the risk of related complications.

[0014] 4. The stent parts of the present invention are arranged in a continuous spiral structure, and the corresponding connecting buckles on the vascular stent are also arranged in a spiral form, which can ensure that the overall stress distribution of the vascular stent is uniform after assembly to avoid local deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0016] Figure 1 This is a structural diagram of the split body of the stent of the present invention; Figure 2 It is a schematic diagram of the development of the vascular stent structure of the present invention; Figure 3 This is a schematic diagram of the connecting buckle structure of the present invention; Among them, 1-bracket split, 2-split unit, 3-telescopic part, 4-connecting buckle, 5-card slot, 6-connecting buckle female buckle, 7-connecting protrusion, 8-connecting buckle male buckle. DETAILED DESCRIPTION

[0017] Reference will now be made in detail to embodiments of the present disclosure, one or more examples of which are set forth herein below. Each embodiment and example is provided by way of explanation of the apparatus, composition and materials of the present disclosure, rather than limitation. On the contrary, the following description provides a convenient illustration of an exemplary embodiment for implementing the present disclosure. In fact, it will be clear to those skilled in the art that various modifications and variations may be made in the teachings of the present disclosure without departing from the scope or spirit of the present disclosure.

[0018] like Figure 1-Figure 3 As shown, the present invention discloses a split below-the-knee vascular stent, comprising a plurality of stent splits 1 in a spiral shape along the length direction of the stent, the stent splits 1 are assembled and spliced ​​with each other to form a complete vascular stent structure, the stent split 1 comprises a plurality of split units 2, the split units 2 are arranged in sequence along the length direction of the vascular stent, adjacent split units 2 are mutually staggered at the same interval angle in the circumferential direction of the vascular stent, the split units 2 of the same stent split 1 are connected by telescopic parts 3 to form a spiral structure together; between the split units 2 of adjacent stent splits 1, the ends of the split units 2 at the same circumferential position are connected and assembled by detachable connecting buckles 4 to form a complete closed-loop structure.

[0019] The number of stent splits 1 can be set according to usage requirements, so that a larger range of radial size adjustment of the vascular stent can be achieved. In an embodiment of the present invention, based on the split unit size of the stent split 1 and the size requirements of the implanted vascular environment, the number of stent splits 1 is set to three groups. At the same time, in order to ensure that the stent still has a certain deformation ability after the number of stent splits 1 is determined to ensure sufficient support effect, the split unit 2 of the present invention adopts a wavy structure that can be telescoped along the circumferential direction of the vascular stent to adjust the radial size of the vascular stent. The design of the wavy structure can also reduce the damage to the vascular wall caused during the implantation of the vascular stent. The stent material of the present invention is preferably made of biocompatible material, such as titanium alloy or a synthetic polymer covered with a drug eluting coating, to reduce vascular inflammatory response and promote endothelial healing.

[0020] The connecting buckle 4 of the present invention includes a connecting buckle female buckle 6 with a card slot 5 and a connecting buckle male buckle 8 with a connecting protrusion 7 matching the card slot 5. The connecting buckle male buckle 8 and the connecting buckle female buckle 6 are respectively arranged at both ends of the split unit 2 to connect adjacent split units 2. The connecting buckle male buckle 8 and the connecting buckle female buckle 6 are relatively fixed using biocompatible medical glue or a bioactive coating that cures at body temperature; when connecting, the vascular stent is fine-tuned by controlling the connection overlap length of the connecting buckle male buckle 8 and the connecting buckle female buckle 6, and finally the vascular stent is finalized; in addition to the overall stent size adjustment, for the special treatment object of the below-the-knee blood vessels, a certain position on the stent contour can be fine-tuned by fine-tuning the connection position of the connecting buckle to adapt to the corresponding blood vessel morphology, improve the adaptability of the stent, and ensure the treatment effect.

[0021] The telescopic member 3 of the present invention adopts an S-shaped structure, and both ends of the telescopic member 3 are respectively connected to the wave crests of the split unit 2, so that the bracket has the ability of axial telescopic deformation.

[0022] The present invention also discloses a method for using the above-mentioned split below-the-knee vascular stent, in which the stent parts of the vascular stent are assembled through connecting buckles, and the overall shape of the stent is maintained by the buckling structure between the connecting buckles. After the assembled vascular stent is implanted into the blood vessel, the shape of the vascular stent can be adjusted at the corresponding position according to the implantation position, so that the vascular stent is highly matched with the corresponding blood vessel morphology to achieve a personalized customization effect. Finally, the connecting ends of the male and female connecting buckles are glued and fixed to complete the shaping of the vascular stent.

[0023] The process of adjusting the shape of the vascular stent according to the implantation position of the present invention includes: pulling the split unit within the adjustment range, adjusting the radial size of the stent through the wavy structure of the split unit, adjusting the axial length of the stent through the telescopic member, and fine-tuning the surface shape of the vascular stent through the matching position of the connecting buckle female buckle and the connecting buckle male buckle at the connection between the stent splits, so that the outer shape of the vascular stent matches the profile requirements of the implantation position.

[0024] The vascular stent structure of the present invention can be implanted in a customized manner according to the blood vessel, and can be mass-produced in the manufacturing stage, and can meet the application requirements in different situations through splicing. At the same time, during the actual surgical implantation, the vascular stent shape is gradually adjusted, and the operation difficulty is low, which can reduce the operation time and reduce the risk of complications, ensuring that the stent can adapt to different physiological and surgical conditions, provide precise treatment, and maintain its structural integrity and long-term vascular support after finalization.

Claims

1. A split below-the-knee vascular stent, characterized in that: The invention comprises a plurality of stent parts (1) which are spirally shaped along the length direction of the stent, wherein the stent parts (1) comprise a plurality of split units (2), wherein the split units (2) are arranged in sequence along the length direction of the blood vessel stent, and adjacent split units (2) are mutually staggered at the same interval angle in the circumferential direction of the blood vessel stent, and the split units (2) of the same stent part (1) are connected by telescopic parts (3) to form a spiral structure together; Between the split units (2) of adjacent bracket splits (1), the ends of the split units (2) at the same circumferential position are connected and assembled via detachable connecting buckles (4) to form a complete closed loop structure.

2. A split below-the-knee vascular stent according to claim 1, characterized in that: The split unit (2) adopts a wave-shaped structure that can be expanded and contracted along the circumferential direction of the blood vessel stent to adjust the radial size of the blood vessel stent.

3. A split below-the-knee vascular stent according to claim 1 or 2, characterized in that: The connecting buckle (4) comprises a connecting buckle female buckle (6) provided with a slot (5) and a connecting buckle male buckle (8) provided with a connecting protrusion (7) matching the slot (5). The connecting buckle male buckle (8) and the connecting buckle female buckle (6) are respectively arranged at two ends of the split unit (2) to connect adjacent split units (2). When connecting, the blood vessel stent is finely adjusted by controlling the connection overlap length of the connecting buckle male buckle (8) and the connecting buckle female buckle (6).

4. The split below-the-knee vascular stent according to claim 3, characterized in that: The male connecting buckle (8) and the female connecting buckle (6) are relatively fixed using biocompatible medical glue or a bioactive coating that cures at body temperature.

5. The split below-the-knee vascular stent according to claim 2, characterized in that: The telescopic member (3) adopts an S-shaped structure, and both ends of the telescopic member (3) are respectively connected to the wave crests of the split unit (2).

6. A method for using the split below-the-knee vascular stent according to any one of claims 1 to 5, characterized in that: The stent parts of the vascular stent are assembled through the connecting buckles, the assembled vascular stent is implanted, and the shape of the vascular stent is adjusted according to the implantation position. Finally, the connecting ends of the male buckle and the female buckle of the connecting buckle are glued and fixed to complete the shaping of the vascular stent.

7. The method for using the split below-the-knee vascular stent according to claim 6, characterized in that: The process of adjusting the shape of the vascular stent according to the implantation position includes: pulling the split unit, adjusting the radial size of the stent through the wavy structure of the split unit, adjusting the axial length of the stent through the telescopic part, and fine-tuning the surface shape of the vascular stent through the matching position of the connecting buckle female buckle and the connecting buckle male buckle at the connection between the stent splits, so that the outer shape of the vascular stent matches the profile requirements of the implantation position.

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