Super-adaptive nitinol intravascular stent

A vascular stent and nickel-titanium alloy technology, applied in the field of medical devices, can solve problems such as radial support, impact on compliance, "fish mouth" phenomenon, and impact on radial performance of the stent

Inactive Publication Date: 2017-10-13
LEO MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, a single helical structure can improve the overall flexibility of the stent and improve the passing performance of the stent, but the radial performance of the stent will be affected, and a "fish mouth" phenomenon may occur when the vascular stent is sharply bent (when the vascular stent is bent, Due to the ...

Method used

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  • Super-adaptive nitinol intravascular stent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] see figure 1 , the embodiment of the present invention provides a super-compliant nickel-titanium alloy vascular stent, which has a tubular structure as a whole, and is mainly used in human blood vessels to support blood vessels so that the flow in the blood vessels is smooth. Several support units 5 are connected, and the extension direction of each support unit 5 along the axial direction is the length direction of the support. Each support unit 5 is a ring structure formed in a wavy manner along the radial direction. It is a sine wave-like structure.

[0027] The stent as a whole is composed of a compliant segment 1 and a normal segment 2, the compliant segment 1 is the two ends of the stent, and the normal segment 2 is the middle part of the stent. The compliance section 1 adopts a double sinusoidal structure, that is, the wave peak of the previous support unit 5 corresponds to the wave peak of the next support unit 5 . The number of bracket units 5 in the complia...

Embodiment 2

[0030] see figure 1 , during the loading process of the stent, the compliant section 1 of the stent will enter the delivery system preferentially. Since the stent unit of the compliant section 1 is wave-shaped, the radial force is relatively small, and it can enter the delivery system better and more effectively. After the compliant section enters the conveying system, it provides an effective path for the entry of the subsequent normal section, making the loading of the overall bracket more convenient and faster.

[0031] Similarly, during the use of the system, the compliant section 1 of the stent will be preferentially pushed out from the delivery system. Since the compliant section 1 has a small radial support force and good flexibility, it can enter the lesion more conveniently. Yes, the whole The efficiency of the operation is greatly improved. At the same time, since the normal section 2 of the stent has good supporting force, it can well support the narrow lesion. Wi...

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Abstract

The invention relates to a medical device, which provides a super-compliant nickel-titanium alloy vascular stent, which includes a plurality of stent units sequentially connected along the axial direction, and each of the stent units is sequentially formed in a sinusoidal manner along the circumferential direction structure, and the stent units at both ends of the vascular stent adopt a peak-to-peak structure, and the middle stent unit adopts a peak-to-trough structure, so that both ends of the stent have compliance, and there is a connection between two adjacent stent units, While ensuring the flexibility of the stent without losing its radial support force, the "fish mouth" effect when the stent is bent is effectively reduced.

Description

technical field [0001] The invention relates to a medical device, in particular to a super-compliant nickel-titanium alloy vascular stent. Background technique [0002] At present, intravascular interventional therapy of vascular stents has gradually become the main treatment method for vascular stenosis diseases. The principle is that the implanted stent usually reaches the lesion site through the delivery system, and then rebuilds the blood vessel after dilation, thereby treating vascular stenosis. This method has the following advantages: less trauma, less complications, high safety, less pain for patients, easy to accept, short hospital stay, and can be tolerated by elderly patients with severe illness. [0003] Among the performance indicators of the stent, the compliance and expansion properties of the stent play a crucial role in the clinical effect both during and after the operation. The compliance performance affects the ability of the stent to straighten the bloo...

Claims

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Application Information

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IPC IPC(8): A61F2/915A61L31/02A61L31/18
CPCA61F2/915A61F2002/91558A61F2002/91575A61F2210/00A61F2210/0014A61F2250/0048A61L31/022A61L31/18
Inventor 张林飞向勇刚
Owner LEO MEDICAL
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