An Electrical Impedance Method for the Determination of Vascular Changes in the Terminal Vascular Bed of Membranous Structures

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Abstract
The method enables the detection of changes in the arterial volume-pulse, blood volume and fluid distribution. The changes recorded as impedance variations may be converted to volume data. The technique requires an electrode arrangement suitable for the membrane being used. Experimental work regarding the effect of the cortical steriods on the integrity of the terminal vessels, and the effect of large doses of histamine on the volume-pulse in the hamster cheek pouch lend support to the validity of the method.