Digital image capture and analysis for split-drop micropuncture

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Abstract
A method for automated image capture and analysis of shrinking drop sequences is described. The procedure can be managed by a single operator and allows estimates of proximal tubule volume flux to be calculated during the experiment. Speed of analysis is increased considerably (mean time 1.5 min per sequence) compared with previous methods. The potential exists for measurement of droplets in tubules that follow a tortuous path in the horizontal plane and further increases in capture and analysis rate would allow estimation of volume flux under non-steady state conditions. Film processing is eliminated and the removal of operator errors, bias and fatigue associated with manual measurement, coupled with the greatly reduced time required for analysis of sequences makes the shrinking drop method much more reliable and attractive.