Application of the “two-slit” photometric technique to the measurement of microvascular volumetric flow rates

HH Lipowsky, BW Zweifach - Microvascular research, 1978 - Elsevier
In vitro studies of red cell suspensions flowing through glass tubes were performed to
provide additional details on the empirical relationship between red cell velocity measured
by the “twoslit” photometric technique along the vessel centerline, V, and the mean velocity
of cells plus plasma, V mean. Small bore glass tubes (17-to 60-μm internal diameter) were
used to simulate a blanket application of this method to the microcirculation. The previously
established ratio, VV mean= 1.6, was found to be valid within 5 to 10% in these tubes and for …