Stent for TIPS

Abstract

The invention relates to a stent for TIPS. The stent is characterized by comprising a tectorial membrane framework, elastic self-expanding frameworks and a precious metal ring, wherein the tectorial membrane framework is made by laser engraving, is of a tubular structure capable of shrinking along the radial direction, and comprises a support bone and a covering membrane; the elastic self-expanding frameworks are formed by mutual cooperation of metal wires and are of taper-pipe-shaped structures capable of contracting in the radial direction. The two elastic self-expanding frameworks are located at the two ends of the tectorial membrane framework respectively and connected with the tectorial membrane framework through precious metal. The large-diameter end of each elastic self-expanding framework is designed to face outwards, and the small-diameter end of the elastic self-expanding framework is designed to face the tectorial membrane framework. The stent is manufactured by adopting a method of end braided wire self-expanding and middle part engraving; when the stent is released, the required application force is smaller, the risk of stent displacement is lower, the operation is more convenient, and the operation effect is better; and meanwhile, the cost of the stent is reduced by adopting a weaving and carving combined mode, and the production process is simplified.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a bracket for TIPS. Background technique [0002] At present, transjugular intrahepatic portocaval shunt (TIPS) is an effective method for the non-surgical treatment of cirrhosis with portal hypertension and its complications. It was developed on the basis of transjugular liver biopsy and portal venography. After 1985, due to the successive development and appearance of intraluminal stents with different configurations, and the experimental TIPS further confirmed that the stent has a good effect on keeping the shunt open, so the application research of TIPS has really started. [0003] The current stents for TIPS are completely self-expanding stents; this type of stent is shrunk and stored in a specific wrapping cavity before use; it is placed at a specific position during surgery, and the wrapping cavity is pulled back to release the stent; however, because the wrapping cavity is ...

AI Technical Summary

Problems solved by technology

[0003] The current stents for TIPS are completely self-expanding stents; this type of stent is shrunk and stored in a specific wrapping cavity before use; it is placed at a specific position during the operation, and the wrapping cavity is pulled back to release the stent; however, because the wrapping cavity is in the The stent exposed at the front end will start to release and self-expand at the same time when it is pulled out backwards. In addition, the TIPS stent has a certain length; therefore, it is necessary to apply considerable suction force to pull out the wrapping cavity, which may cause the displacement of the TIPS stent, thereby affecting the quality of the operation. ; At the same time, the process of self-expanding stent is difficult and costly

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