Recyclable vascular stent and recycling method thereof

Abstract

The invention discloses a recyclable vascular stent and a recycling method thereof. The vascular stent comprises a tubular netted framework woven by silks, the end part of the stent is provided with a connecting structure, and the connecting structure forms separable connection with a stent conveyor; the stent can be arranged in the stent conveyor, and can be restored to the original shape after being released; and net holes on the part of the connecting structure are more loosen than other grids, and are used for repeatedly positioning and / or recycling the stent in a vascular cavity. The netholes positioned on the connecting structure on the end part of the stent are easier to stretch and deform than other net holes at other positions, the connecting structure is folded and pulled into a sheath catheter of the stent conveyor, and the rest part of the stent is also collected in the sheath catheter of the stent conveyor, so an operator is greatly convenient to adjust the form of the stent and adjust the proper position of the stent in the vascular cavity and even recycle the stent from the vascular cavity, the repeated positioning and smooth recycling of the vascular stent are realized, and the technical requirement of PTA therapy is better met.

Description

technical field [0001] The invention relates to the field of medical devices for treating or assisting the treatment of vascular diseases, and more specifically, the improvement relates to a recoverable vascular stent and a recovery method thereof. Background technique [0002] With the change of medical treatment mode and the improvement of people's living standards, the types and frequency of diseases have also been significantly different, especially the incidence of vascular diseases has shown an increasing trend year by year. [0003] Vascular diseases can be divided into arterial vascular diseases and venous vascular diseases according to the location of blood vessels, wherein: the arterial vascular diseases can be subdivided into dilated arterial vascular diseases and occlusive arterial vascular diseases, and venous vascular diseases can be further subdivided into Venous reflux disease and venous occlusion disease; the vascular diseases can be divided into congenital ...

AI Technical Summary

Problems solved by technology

[0005] A large number of different stents will be used in different treatment processes, and these stents can be delivered to the diseased part of the blood vessel through the catheter, such as: abnormal blood vessels such as vascular stenosis, hemangioma, arteriovenous fistula; many stents in the prior art Laser-cut tubular stents, although there are wire-braided mesh stents, however, the actual surgical situation is sometimes more complicated. Retrieval into catheter or sheath for secondary positioning and release

[0006] However, some current stents cannot achieve the functions of recyclability and repositioning; while some can only achieve the function of partial recovery, but cannot meet other requirements. For example, laser-cut closed-loop tubular stents, once fully released It can no longer be retracted into the catheter, and its bending performance is very poor, so it cannot be used in limbs or curved blood vessels; some stents are gathered together through some sleeves, and one end is fixed with a metal nut, which is connected with the push rod. Metal wires and sleeves are easy to accumulate on the nut end during recovery, resulting in great resistance. A thicker catheter is required to achieve recovery, which is not suitable for use in smaller blood vessels.

[0007] Therefore, the existing technology still needs to be improved and developed

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