A stent graft delivery and its distal positioning release system

Abstract

The invention relates to a covered stent conveying and far-end positioning releasing system. A stent conveying mechanism comprises a core pipe assembly composed of a liquid filling port, a core pipe and a guide head, a middle pipe assembly composed of a middle pipe and a second control handle, and a sheath pipe assembly composed of a sheath pipe and a first control handle. A stent far-end positioning releasing mechanism comprises a guide wire, a guide wire rewinding system and a guide wire pulling ring. A stent and the guide wire are bundled and compressed in a stent loading area of the stent conveying mechanism through a stent bundling line. After the stent conveying mechanism conveys the stent to the designated position, the middle pipe assembly and the core pipe assembly are mixed, the sheath pipe is retreated till the stent is completely exposed, the guide wire pulling ring is unscrewed, the guide wire is slowly pulled backwards, the guide wire is retreated through the guide wire rewinding system and moves from the far end to the near end of the stent, the guide wire and a stent bundling line winding point are disengaged in sequence along with retreating of the guide wire, the stent is automatically bounced off and released after being disengaged from the stent bundling line, finally, positioning releasing of the stent from the far end to the near end is achieved, and positioning precision is improved.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a covered stent delivery system and a remote positioning release system thereof. Background technique [0002] In recent years, the endovascular treatment of aortic disease has developed rapidly and has become an indispensable method for the treatment of aortic disease. Endovascular aortic repair (EVAR) includes aortic dissection, penetrating aortic ulcer, aortic intramural hematoma, thoracic / abdominal aortic aneurysm, and pseudoaneurysm. Secondary endovascular treatment for postoperative complications of aortic surgery or EVAR. Compared with traditional surgical treatment, EVAR has the advantages of less trauma, faster recovery, high technical success rate, fewer complications, and lower mortality rate. [0003] However, due to the variability of individual patients and the complexity of the characteristics of aortic lesions, endovascular repair has brought...

AI Technical Summary

Problems solved by technology

However, due to the complex operation, high difficulty, high risk and many complications of this type of technique, only a few vascular surgery centers in China currently carry out

Images