In vitro investigation on opening angle and hydrodynamic performance of four bileaflet valves in mitral position

Author

Feng, Z.G. ; Umezu, M. ; Fujimoto, T. ; Tsukahara, T. ; Nurishi, M. ; Kawaguchi, D.

Author_Institution

Dept. of Mech. Eng., Waseda Univ., Tokyo, Japan

Volume

1

fYear

1999

fDate

1999

Abstract

Four different designs of 25 mm bileaflet valves were tested in the mitral position using our originally developed in vitro test apparatus. By the aid of a high-speed video camera, it was observed that the SJM HP valve opened fully and the CM nearly opened fully (76°±2°). Max opening angle of the ATS and the On-X was 72°±3° and 81°±2° respectively whereas their opening angle was designed as 85° and 90°, respectively. Pressure gradients of the CM and the ATS were consistently higher than those of the On-X and the SJM HP. Closing volume for all the valves was within the acceptable range (<8%)

Keywords

cardiology; haemodynamics; prosthetics; 25 mm; bileaflet valves; closing volume; high-speed video camera; hydrodynamic performance; in vitro investigation; mitral position; opening angle; pressure gradients; Cameras; Design engineering; Hydrodynamics; In vitro; In vivo; Mechanical engineering; Orifices; Shape; Testing; Valves;

fLanguage

English

Publisher

ieee

Conference_Titel

[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint

Conference_Location

Atlanta, GA

ISSN

1094-687X

Print_ISBN

0-7803-5674-8

Type

conf

DOI

10.1109/IEMBS.1999.802223

Filename

802223