ANALYSIS OF FLOW PATTERN IN THE VICINITY OF PROSTHETIC HEART VALVES BY MEANS OF LASER-DOPPLER ANEMOMETER.

Junji Seki, Takao Nakamura, Mitsuo Umezu, Kozaburo Hayashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Fluid mechanical characteristics of blood flow in the vicinity of prosthetic heart valves are investigated by in vitro experiments using a laser-Doppler anemometer (LDA) under pulsatile flow condition. Average flow velocity and root mean square disturbance velocity at each point are obtained by a phase average method. Cross-sectional velocity distributions are plotted 3-dimensionally by computer analyses of LDA data, by which one can observe the overall feature of valve flow not only quantitatively but also visually. Rod-like fluid flow throughout the cross-section is observed in the early systolic phase and then a cylindrical jet flow rapidly appears along the inner wall of model aorta in CC Bjoerk-Shiley valve.

Original languageEnglish
Title of host publicationJapanese Journal of Medical Electronics and Biological Engineering
PublisherJapan Soc of Medical Electronics & Biological Engineering
Pages434-435
Number of pages2
Volume22
Publication statusPublished - 1984 Apr
Externally publishedYes

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Heart valve prostheses
Anemometers
Flow patterns
Pulsatile flow
Lasers
Velocity distribution
Flow velocity
Flow of fluids
Blood
Fluids
Experiments

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Seki, J., Nakamura, T., Umezu, M., & Hayashi, K. (1984). ANALYSIS OF FLOW PATTERN IN THE VICINITY OF PROSTHETIC HEART VALVES BY MEANS OF LASER-DOPPLER ANEMOMETER. In Japanese Journal of Medical Electronics and Biological Engineering (Vol. 22, pp. 434-435). Japan Soc of Medical Electronics & Biological Engineering.

ANALYSIS OF FLOW PATTERN IN THE VICINITY OF PROSTHETIC HEART VALVES BY MEANS OF LASER-DOPPLER ANEMOMETER. / Seki, Junji; Nakamura, Takao; Umezu, Mitsuo; Hayashi, Kozaburo.

Japanese Journal of Medical Electronics and Biological Engineering. Vol. 22 Japan Soc of Medical Electronics & Biological Engineering, 1984. p. 434-435.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Seki, J, Nakamura, T, Umezu, M & Hayashi, K 1984, ANALYSIS OF FLOW PATTERN IN THE VICINITY OF PROSTHETIC HEART VALVES BY MEANS OF LASER-DOPPLER ANEMOMETER. in Japanese Journal of Medical Electronics and Biological Engineering. vol. 22, Japan Soc of Medical Electronics & Biological Engineering, pp. 434-435.
Seki J, Nakamura T, Umezu M, Hayashi K. ANALYSIS OF FLOW PATTERN IN THE VICINITY OF PROSTHETIC HEART VALVES BY MEANS OF LASER-DOPPLER ANEMOMETER. In Japanese Journal of Medical Electronics and Biological Engineering. Vol. 22. Japan Soc of Medical Electronics & Biological Engineering. 1984. p. 434-435
Seki, Junji ; Nakamura, Takao ; Umezu, Mitsuo ; Hayashi, Kozaburo. / ANALYSIS OF FLOW PATTERN IN THE VICINITY OF PROSTHETIC HEART VALVES BY MEANS OF LASER-DOPPLER ANEMOMETER. Japanese Journal of Medical Electronics and Biological Engineering. Vol. 22 Japan Soc of Medical Electronics & Biological Engineering, 1984. pp. 434-435
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