M L J Rose et al 1997 Physiol. Meas. 18 171 doi:10.1088/0967-3334/18/3/002
Correlation of radionuclide and optical tracer assessments of fluid flow in artificial ventricles
M L J Rose
, G A Wright
, T G Mackay, W Martin, and D J Wheatley
Characterization of flow properties for an artificial ventricle may aid development of designs to minimize thrombosis. Techniques for determining two such flow properties, viz. ventricular clearance rate and ejection fraction, are compared and validated here for polyurethane and silicone rubber ventricles operated in a mock circulatory loop at various stroke volumes and pulse rates. Ventricular clearance rates were measured both by clinical radionuclide tracer techniques and by an optical tracer method. Ejection fractions were measured by radionuclide imaging and validated by direct measurements of flow rate and ventricular volume. Results from the two methods for ventricular clearance are in close agreement. The optical tracer method is superior in spatial resolution, convenience and economy, but the radionuclide tracer method for ejection fraction gives excellent agreement with the absolute measurements.
Keywords: flow visualization, fluid tracer, ventricular assist device, artificial ventricle
- PACS
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47.63.Cb Blood flow in cardiovascular system
- Subjects
- Dates
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Issue 3 (August 1997)
Received 13 March 1997
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Correlation of radionuclide and optical tracer assessments of fluid flow in artificial ventricles
M L J Rose et al 1997 Physiol. Meas. 18 171
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