Skip to main content

In vitro ultrasonic imaging of flow through prosthetic heart valves.

Publication ,  Journal Article
Gels, GC; Stewart, HF; Smith, SW
Published in: Medical instrumentation
April 1987

A rapid, inexpensive, portable technique has been developed for the qualitative and semiquantitative evaluation of in vitro flow characteristics through prosthetic heart valves. The technique combines a cardiac pulse duplicator and any diagnostic, linear sequential array, ultrasonic imaging system. The pulse duplicator has been modified to include an acoustically transparent aortic section which contains the prosthetic valve to be evaluated. The acoustically transparent section is fabricated from Rho-c rubber and enables direct flow-imaging for several centimeters on both sides of the prosthesis. Aerated tap water is used as a contrast medium. Forward and reverse flow, laminar flow complex eddy patterns, regurgitation, and jets are easily observed in real time over a wide field of view. Time-exposure photography of sequential images and subsequent off-line calculations enable point-by-point determinations of flow velocities. This work allowed preliminary evaluations of four cardiac valves: Bjork-Shiley, St. Jude, caged disk, and Starr-Edwards.

Duke Scholars

Published In

Medical instrumentation

ISSN

0090-6689

Publication Date

April 1987

Volume

21

Issue

2

Start / End Page

66 / 74

Related Subject Headings

  • Ultrasonography
  • Rheology
  • Pulsatile Flow
  • In Vitro Techniques
  • Humans
  • Heart Valve Prosthesis
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Gels, G. C., Stewart, H. F., & Smith, S. W. (1987). In vitro ultrasonic imaging of flow through prosthetic heart valves. Medical Instrumentation, 21(2), 66–74.
Gels, G. C., H. F. Stewart, and S. W. Smith. “In vitro ultrasonic imaging of flow through prosthetic heart valves.Medical Instrumentation 21, no. 2 (April 1987): 66–74.
Gels GC, Stewart HF, Smith SW. In vitro ultrasonic imaging of flow through prosthetic heart valves. Medical instrumentation. 1987 Apr;21(2):66–74.
Gels, G. C., et al. “In vitro ultrasonic imaging of flow through prosthetic heart valves.Medical Instrumentation, vol. 21, no. 2, Apr. 1987, pp. 66–74.
Gels GC, Stewart HF, Smith SW. In vitro ultrasonic imaging of flow through prosthetic heart valves. Medical instrumentation. 1987 Apr;21(2):66–74.

Published In

Medical instrumentation

ISSN

0090-6689

Publication Date

April 1987

Volume

21

Issue

2

Start / End Page

66 / 74

Related Subject Headings

  • Ultrasonography
  • Rheology
  • Pulsatile Flow
  • In Vitro Techniques
  • Humans
  • Heart Valve Prosthesis