Date of Award

Fall 1998

Document Type

Thesis - Restricted

Degree Name

Master of Science (MS)


Electrical Engineering

First Advisor

Seitz, Martin A.

Second Advisor

Myklebust, Joel

Third Advisor

Jeutter, Dean C.


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.



Restricted Access Item

Having trouble?