Date of Award
Fall 1998
Document Type
Thesis - Restricted
Degree Name
Master of Science (MS)
Department
Electrical Engineering
First Advisor
Seitz, Martin A.
Second Advisor
Myklebust, Joel
Third Advisor
Jeutter, Dean C.
Abstract
Fluid distribution in the human arm was estimated using impedance measurements in the frequency range from 100 Hz to 1 MHz from six males and three females. Changes in fluid distributions were induced by postural changes and partial venous occlusion. Impedance measurements were made with an existing four terminal system employing a 100 uA constant current source and phase sensitive detector in conjunction with ancillary circuits. With the use of impedance spectroscopy, data were fitted to an equivalent circuit model. Model parameters were used to determine critical frequency and fitted as a function of time and fluid volume. The resultant model was used to demonstrate fluid distribution in the human forearm and correlated with plethysmography measurements. Data demonstrated sensitivity to small fluid changes due to capillary filtration in distribution of 1.36 ml/ 100 ml tissue.
Recommended Citation
Schannen, Peter Nickolaus, "Estimation of Fluid Distribution in the Arm Using Electrical Impedance Spectroscopy" (1998). Master's Theses (1922-2009) Access restricted to Marquette Campus. 4040.
https://epublications.marquette.edu/theses/4040