A stent delivery system

Abstract

The invention discloses a stent conveying system which comprises a proximal operating handle, a locking screw, a tightening tail sleeve, a conveying steel cable, a densely wound spring, a front-end enclosing ring, an instrument connecting bolt head, a stent system and a catheter. A center hole is formed in the proximal operating handle, locking threaded holes are laterally formed in the proximal operating handle, the conveying steel cable is inserted into the center hole and is fixed by the aid of the locking screw, two ends of the conveying steel cable are tightened by the tightening tail sleeve and the front-end enclosing ring, the conveying steel cable penetrates the densely wound spring, is fixed to the densely wound spring, further extends into an inner hole in the tail end of the instrument connecting bolt head and is integrally fixed to the inner hole, an inner nut and an end of a stent are fixed to each other to form the stent system, and the inner nut in the stent system and a bolt at the front end of the instrument connecting bolt head are screwed with each other; the proximal operating handle can be pushed in the front-back direction and can simultaneously drive the stent to relatively move in the catheter. The stent conveying system has the advantages that the stent conveying system is simple in particular structure, convenient to operate, accurate in implantation and excellent in development characteristics, and tracking and positioning judging can be facilitated.

Description

technical field [0001] The invention relates to a minimally invasive interventional medical device, in particular to a stent delivery system, which is used to deliver and release a stent to a lesion in a cavity. Background technique [0002] Interventional treatment is an emerging treatment method between surgery and medical treatment, including endovascular intervention and non-vascular intervention. After more than 30 years of development, it has now been called the three pillar disciplines together with surgery and internal medicine. To put it simply, interventional therapy is to make a small channel with a diameter of several millimeters on the blood vessel or skin without exposing the lesion, or through the original pipeline of the human body, in the imaging equipment (angiography machine, fluoroscopy machine, CT, MR). , B-ultrasound) to treat the local lesion under the guidance of the least traumatic treatment. Due to the aging population in my country and the launch...

AI Technical Summary

Problems solved by technology

For the delivery of similar inferior vena cava filter stents, it is generally practiced abroad to use push catheters to push them out, and its precise positioning ability is slightly poor; and if the release positioning is not accurate, it will be troublesome to adjust again, and the operation time will be prolonged

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