Covered stent conveying and releasing system

Abstract

The invention relates to a covered stent conveying and releasing system. The covered stent conveying and releasing system includes a handle, a conveying shaft, a sheath tube and a tearing component, the conveying shaft is a strip-shaped rod, one end of the conveying shaft is connected and fixed to the handle, and the other end of the conveying shaft extends toward the outside of the handle, a guide tip is arranged on the end part of the other end of the conveying shaft, the sheath tube detachably sleeves the outside of the conveying shaft, a covered stent is preoperatively assembled in the sheath tube and sleeves the conveying shaft, and the tearing part is used for opening the sheath tube in the length direction of the sheath tube in the process of pulling the sheath tube toward the handle under the action of external force to release the covered stent. The covered stent conveying and releasing system has the advantages that structure design is simple and reasonable, operation is easyand flexible, rapid releasing of the covered stent is advantageous, the covered stent conveying and releasing system is suitable for releasing of the covered stent with an artificial blood vessel, obstruction by the artificial blood vessel is avoided, and the condition of the damaged blood vessel caused by contact between a traditional covered stent and the blood vessel when the traditional covered stent is strapped on the conveying shaft and released can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a stent graft delivery and release system. Background technique [0002] For patients with severe aortic vascular disease or injury, surgical thoracotomy is usually required clinically, and artificial blood vessels and covered stents are used to replace the diseased or damaged blood vessels. The patent name is artificial blood vessel, and the invention patent with the patent number CN201610639554 records an artificial blood vessel, which can quickly connect the artificial blood vessel with the human blood vessel, greatly shortening the operation time. The front end of the artificial blood vessel provided by the invention contains a covered stent , the artificial blood vessel contains branches, and part of the covered stent needs to be transported into the blood vessel and released during the operation. In existing vascular surgery and interventional operations, when the ...

AI Technical Summary

Problems solved by technology

In existing vascular surgery and interventional operations, when the vascular stent is released after being transported in place, the pull-out release method is often used. This method can only be used to release the stent-graft without artificial blood vessels or the artificial stent-graft without branches. The covered stent graft of the blood vessel cannot be used to release the covered stent graft with branched artificial blood vessels as described in patent CN201610639554; another existing method of ligating to release the covered stent graft (such as patent CN200510028616), although it can release the covered stent graft with branches The stent-graft of the artificial blood vessel and the stent-graft of the artificial blood vessel without branch have several disadvantages in this method: 1) the stent-graft is tied with wires, which is inconvenient to assemble; 2) when the stent-graft is delivered, the stent-graft The coating on the outside of the stent is directly in contact with the human blood vessels, and the surface of the coating is rough, and the friction between it and the human blood vessels is large during delivery, which is easy to damage the blood vessels; Between the human blood vessels, it is easy to damage the human blood vessels when taking out the binding thread

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