Stent conveying device and stent loading method

Abstract

The invention provides a stent conveying device which comprises a sheath tube and an inner catheter, wherein the sheath tube is arranged outside the inner catheter in a sleeving manner; the inner catheter has a first expansion state; at the first expansion state, a stent is pressed and held in the sheath tube; the inner catheter is at a ball state; the outer surface of the inner catheter is adhered to the inner wall of the stent at the pressed and held state; and the outer diameter of the inner catheter is smaller than the inner diameter of the sheath tube. By adopting the stent conveying device, the stent is expanded through the inner catheter, so that the state of the stent pressed and held in the sheath tube can be adjusted, the phenomenon that the stent pressed and held in the sheath tube has non-uniform stress can be reduced, the loading uniformity of the stent can be improved, and furthermore, the risks that the release quality is affected, peripheral tissue is damaged, valve fatigue can be affected, even conveying systems are damaged and a retracement function is affected as twisting and sinking are caused in the release process because of the phenomena of the stent can be reduced, that is, the stent release success rate can be increased.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a stent delivery device and a stent loading method. Background technique [0002] With the development of social economy and the aging of the population, the incidence of valvular heart disease has increased significantly. Studies have shown that the incidence of valvular heart disease in the elderly population over 75 years old is as high as 13.3%. At present, traditional surgical treatment is still the first choice for patients with severe valvular disease, but for patients who are elderly, complicated with multiple organ diseases, have a history of thoracotomy, and have poor heart function, the risk of traditional surgery is high and death The rate is high, and some patients do not even have the chance of surgery. Transcatheter heart valve replacement has the advantages of no need for thoracotomy, less trauma, and faster recovery of patients, and has attracted extensi...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a bracket delivery device and a bracket loading method, to solve the problem of low loading uniformity after the bracket is loaded into the existing bracket delivery device, and to use the existing bracket loading method to load the bracket easily to make the bracket The problem of low loading uniformity

Images