TY - JOUR
AU1 - Gao, Bruce
AU2 - Schulz, Olaf
AU3 - Pandya, Samir
AU4 - Hwang, Ned
AB - The structured light technique recently developed in our laboratory to investigate the dynamic leaflet surface contour of bioprosthetic heart valves (BHVs), has been applied in a pulsatile flow loop to investigate a 25 mm commercial BHV. To simulate the physiological condition closely, a pulsatile heart valve testing loop, which reproduce physiological aortic and ventricular pressures and flow, was employed. The aortic conduit has been modified by adding an optical window to facilitate the visualization of the valve surface. Transient optical fringes were projected through the window to create a fringe pattern on the leaflet surface. The time-varying image of the surface was captured by a CCD camera. By using Fourier transform technique, the recorded fringe pattern was analyzed and the surface contours were retrieved. Corresponding to the various phases in one cardiac cycle, sequences of valve surface contours were obtained for both the original and the improved models of the BHVs respectively. The results showed that the improved model has superior performance over its predecessor. The application has demonstrated that the newly developed metrological technique has adequate precision to be used to investigate the leaflet motion of BHV under simulated physiological conditions. By combining the present technique with the computational fluid dynamics and finite element method, this technique can be a useful tool for the design and improvement of new BHV.
TI - A Structured Light Technique for Monitoring Bioprosthetic Heart Valve Leaflet Surface Contours
JF - Cardiovascular Engineering: An International Journal
DO - 10.1023/A:1011531421133
DA - 2004-10-19
UR - https://www.deepdyve.com/lp/springer-journals/a-structured-light-technique-for-monitoring-bioprosthetic-heart-valve-2AHn4Yjzz0
SP - 3
EP - 13
VL - 1
IS - 1
DP - DeepDyve
ER -