Stent for Percutaneous Heart Valve Implantation
نویسنده
چکیده
The goal of this work is to develop an atraumatic stent concept for percutaneous aortic valve replacement. Shape setted braided nitinol wires, thanks to their specific geometry and elasticity, allows stent's compressibility, self deployment and aortic root preservation. Prototypes manufacturing technique and relatives constraints are presented. Performance of the obtained prototypes are evaluated in vitro, in terms of sealing, static and dynamic regurgitation. More specifically, the pulsatile bench testing has been optimized to take in account the compliant constraint of the aortic valve environment. The results bring to the fore which are the dimensions (head height, cone angle...) and the structures features that do influence the endoprosthesis behavior significantly.
منابع مشابه
Transcatheter Implantation of a Bovine Valve in Pulmonary Position
Background—Pulmonary regurgitation can lead to severe right ventricular dysfunction, which is a delicate postoperative problem in the long-term follow-up of patients who had surgery for congenital heart diseases. Clinical conditions of patients suffering from pulmonary valve incompetence are improved by valve replacement with a prosthetic valve. To date, the surgical approach is the only option...
متن کاملPercutaneous valve repair and replacement: challenges encountered, challenges met, challenges ahead.
Percutaneous valve therapy developed initially with aortic valve replacement, described by Andersen et al3 in 1992 in a swine model. These investigators fabricated a stent-mounted bioprosthetic valve and demonstrated that percutaneous implantation is feasible. Bonhoeffer et al4 reported the use of a stent-mounted bioprosthesis for pulmonic valve replacement in 2000. This achievement clearly mar...
متن کاملTranscatheter implantation of a bovine valve in pulmonary position: a lamb study.
BACKGROUND Pulmonary regurgitation can lead to severe right ventricular dysfunction, which is a delicate postoperative problem in the long-term follow-up of patients who had surgery for congenital heart diseases. Clinical conditions of patients suffering from pulmonary valve incompetence are improved by valve replacement with a prosthetic valve. To date, the surgical approach is the only option...
متن کاملPercutaneous implantation of a valve in the descending aorta in lambs.
AIMS We assessed the feasibility of percutaneous implantation of a valve in the descending aorta and its function in systemic pressures. METHODS AND RESULTS A biological valve harvested from a bovine jugular vein was sutured into a stent. After the creation of aortic insufficiency, the valved stent was percutaneously implanted into eight lambs divided into two groups depending on the severity...
متن کاملEmergent Chimney Stent to Treat Left Main Occlusion Following Valve-In-Valve Transfemoral Aortic Implantation Chimney Stent Following Valve-In-Valve TAVI
Implantation of transcatheter valves inside degenerated surgical bioprosthesis is nowadays a very good alternative to redo a new cardiac surgery especially in high risk patients. Although procedural success is achieved in most of the patients, these procedures are associated with few potential risks such as coronary occlusion. It is very important to perform an exhaustive study prior to the val...
متن کامل