RECYCLABLE AND ADJUSTABLE INTERVENTIONAL STENT FOR INTRAVASCULAR CONSTRICTION

• US 20140303710A1
• Filed: 10/24/2012
• Published: 10/09/2014
• Est. Priority Date: 10/25/2011
• Status: Active Grant

• Current Assignee: The First Affiliated Hospital Of Nanjing Medical University
• Original Assignee: The First Affiliated Hospital Of Nanjing Medical University
• Inventors: Gu, Weidong, Zhang, Shijiang
• Granted Patent: US 9,814,564 B2
• Time in Patent Office: Days
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/9534 for repositioning of stents
• CPC Class Codes: A61F 2002/9665 with additional retaining means
• CPC Class Codes: A61F 2210/0061 swellable
• CPC Class Codes: A61F 2230/0078 hyperboloidal
• CPC Class Codes: A61F 2250/001 for adjusting a diameter

Abstract

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.

Claims

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).

2. The recyclable and adjustable interventional stent for intravascular constriction according to claim 1, wherein, the upper expanded segment (1) and the lower expanded segment (4) of the stent are made of memory alloy mesh, while the middle segment with variable diameter (2) is formed by jointing diamond shaped medical stainless steel wire, and the diamond shaped medical stainless steel wire is connected to memory alloy stents in the upper and lower expanded ends, respectively.