Preparation of valved tricuspid stent and in vitro experimental implantation to tricuspid position through catheter
10.3724/SP.J.1008.2008.00200
- Author:
Yuan BAI
1
Author Information
1. Department of Cardiology
- Publication Type:Journal Article
- Keywords:
Heart catheterization;
Heart valve prosthesis implantation;
Stents;
Tricuspid valve
- From:
Academic Journal of Second Military Medical University
2010;29(2):200-202
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To prepare valved tricuspid stent and to discuss the techniques of transcatheter tricuspid valve replacement in vitro. Methods: We designed a self-expandable stent made of super-elastic Ni-Ti shape memory alloy. The stent was composed of double disks with tubular linkage between them. A valvular ring made of nitinol wire was sutured on the tubular part. Fresh sheep pericardium was decellularized, treated with 0.6% glutaraldehyde solution for 48 h and then sutured on the valvular ring. Through a 16-French sheath positioned in the right ventricle of isolated sheep heart via vena cava, the device was delivered into the tricuspid valve. When the right ventricle disk was deployed, it was applied to the tricuspid annulus by pulling back the external sheath. Then the waist and the right atrial disk were deployed in the annulus and right atrium, respectively, by pulling the sheath. Thus the whole device was deployed in the native tricuspid. Water was injected into the right ventricle to test the competence of the prosthetic heart valves. Results: The prepared valved tricuspid stent could be stably positioned at the native valves. There was no stent migration when it was repeatedly pulled. The two disks sandwiched the native tricuspid valve with one disk lying in the right ventricle and the other one in the right atrium. The prosthetic heart valves showed satisfactory function without structure damage. Conclusion: This self-expandable stent is well designed and can be safely implanted in the tricuspid valve position via transcatheter approach; and the function of the stent is satisfactory.
