Completely degradable covered stent and covered stent system

Abstract

The invention relates to a completely degradable covered stent and a covered stent system. The completely degradable covered stent is formed by fusing a degradable bare stent and a covering film, boththe degradable bare stent and the covering film are made of a degradable material, the degradable bare stent is of multi-layer chain-shaped structures which are connected together through a pluralityof S chains distributed in the axial direction, each layer of chain-shaped structures is formed by connecting a plurality of rhombic frames, threading holes are formed in intersections of the rhombicframes, and developing points are arranged at peak positions. The covered stent system comprises the completely degradable covered stent and a delivery system, wherein the delivery system comprises aTIP end, a balloon, a protective sheath, a far-end tube, an inner tube and a near-end tube, the covering film stent is loaded on the balloon, one side facing the near-end is connected with a hanging-corner stent on the far-end tube through a hanging corner, and the protective sheath sleeves the covering film stent. An interventional implantation-free instrument concept is adopted, the forming iseasy, the operation implantation into a human body is convenient, no residual foreign matter is generated, the treatment of a patient is facilitated to the most degree, the medical value is very high,and the operation is safe and convenient.

Description

technical field [0001] The invention relates to the field of vascular interventional medical devices, in particular to a fully degradable stent graft and a stent graft system. Background technique [0002] Vascular access is a necessary condition for maintenance hemodialysis patients to establish extracorporeal circulation. When vascular access fails or severe mechanical complications occur, it is very important to carry out salvage treatment. In recent years, with the emergence of covered stents, It has expanded new fields to solve complications such as vascular stenosis, rupture, and other vascular access-related problems, and its effects and advantages have attracted more and more attention. [0003] Covered stents refer to metal stents coated with special membrane materials (polytetrafluoroethylene, polyester, polyester, polyurethane, etc.). It not only retains the function of the metal stent, but also has the characteristics of the membrane material. The choice of ste...

AI Technical Summary

Problems solved by technology

[0004] Many stent-grafts currently on the market are non-degradable stent-grafts and semi-degradable stent-grafts. After implantation of such stent-graft systems in the human body, it is easy to cause further narrowing of blood vessels and cause complications.

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