Flow-limiting external vascular stent

Abstract

The invention relates to the field of medical equipment and provides a flow-limiting external vascular stent. The stent made of an insoluble and non-degradable biocompatible material is of a tubular structure, and an opening for embedding of a blood vessel is axially formed in a stent wall. Due to the fact that the effective inner diameter of the hollow tubular structure of the stent is smaller than the effective outer diameter of the blood vessel which is embedded in the inner wall of the tubular structure from an open-lap seam, compression of the external blood vessel stent upon the blood vessel is formed to reduce the outer diameter of the blood vessel and compress the blood vessel to reduce the inner diameter, and the corresponding treatment purpose is achieved by reducing blood supply of the blood vessel to tissue.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a flow-limiting extravascular stent. Background technique [0002] The existing vascular stent refers to a vascular stent, which is a device inserted into a blood vessel through a catheter. It is made of insoluble and non-degradable biocompatible materials. After the stent is placed in the blood vessel, it supports outward to expand the inner diameter of the blood vessel. Improve the stenosis of the inner wall of the blood vessel caused by the deposition of atherosclerotic plaque, thereby expanding the inner diameter of the local blood vessel and increasing the blood flow of the blood vessel. Intravascular stents can be used for the treatment of heart, cerebrovascular and other important vascular atherosclerosis and corresponding angina pectoris, myocardial infarction, cerebrovascular and other organs with serious blood supply insufficiency. Due to the invention of the stent, it...

AI Technical Summary

Problems solved by technology

Partial splenectomy cannot be an effective method due to the fragility of the tissue and the difficulty in suturing and hemostasis

In addition, if the platelets are reduced and other treatments are difficult to be effective, there are also a large proportion of patients who cannot improve the platelet count after splenectomy, but the gain outweighs the gain

Local embolism is also difficult for patients to accept due to the pain and complications caused by local necrosis, side effects and uncertainty of effect

Radiotherapy is also difficult to adopt due to side effects and poor curative effect

Moreover, these methods are irreversible. If they are ineffective, there are obvious complications and side effects, there is no way to recover, and some will have serious consequences.

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