Hydrodyamical assessment of valve prosthesis made of expanded ultra-microporous Teflon in vitro.
OBJECTIVE
To assess the hydrodynamical performance of the valve prosthesis made of expanded ultra-microporous Teflon in vitro.


METHODS
Sheets of the expanded ultra-microporous Teflon were sewn onto flexible bracket to prepare artificial valve prosthesis. The leakage and steady flow of the valve prosthesis was tested in vitro with Baxter valve prosthesis as control.


RESULTS
The rate of leakage of this new valve prosthesis was similar to that of Baxter valve prosthesis (P>0.05), and the systolic pressure gradient of the former was much lower than control(P<0.05).


CONCLUSIONS
This new artificial valve prosthesis has good in vitro hydrodynamical properties, which are superior to Baxter valve.
Liang
Yong
Y
Department of Cardiothoracic Surgery, Nanfang Hospital, First Military Medical University, Guangzhou 510515, China.
Wang
Wu-Jun
WJ
Cai
Kai-Can
KC
D006350:Heart Valve Prosthesis / Q000592:standards*; D011138:Polytetrafluoroethylene
D011138:Polytetrafluoroethylene