RECYCLABLE AND ADJUSTABLE INTERVENTIONAL STENT FOR INTRAVASCULAR CONSTRICTION

摘要

A recyclable and adjustable interventional stent for intravascular constriction. The stent main body is divided into three parts and shaped like a waist drum with expansion parts (1, 4) being arranged on the upper and lower parts of the stent main body respectively for supporting and positioning. A variable aperture part (2) is arranged in the middle of the stent main body. The upper expansion part (1) is or is not provided with a coating; the middle variable aperture part (2) and the upper half part of the lower expansion part (4) are covered with a pericardium (3) subjected to anti-calcification treatment; and a metal wire ring (5) is passed through the lowermost edge of the stent. A compound conveying guide pipe is composed of an outer sheath (6) and a core (7). The core (7) is a hollow pipe and a wire hanging groove is arranged on the outer side wall of the tip of the pipe to hang the metal wire ring (5) of the lowermost edge of the stent. A fixing bolt (8) on the outer sheath (6) is used for fixing the relative position between the outer sheath (6) and the core (7). The stent is used to replace conventional pulmonary artery banding as, adhesion not being formed around the heart and major vessels and pulmonary stenosis not being formed, difficulties during radical surgery are not increased.

主权项

1. A recyclable and adjustable interventional stent for intravascular constriction, comprising stent and composite delivery catheter, wherein, the stent is dolioform and comprises the upper expanded segment (1), the middle segment with variable diameter (2), and the lower expanded segment (4); the middle segment with variable diameter (2) and the upper half of the lower expanded segment (4) are covered with pericardium (3) treated to prevent calcification; while the lower edge of the stent is threaded with a wire ring (5); the composite delivery catheter comprises an outer sheath (6) and an inner core (7), wherein, the inner core is a hollow tube, and there is a groove for thread hanging on the outer wall at the front tip of the tube, and it is intended to hook the wire ring on the lower edge of the stent, and there is a mounting bolt (8) on the outer sheath (6).