SOLVED:Impedance plethysmography uses a four-band electrode placed around the leg. A constant current is supplied to the two outer electrodes, and the voltage between the two inner electrodes is measured. The ratio of the voltage to current gives the limb impedance. Assume that the electrodes cover a length L, with volume V0 and tissue resistivity ρ0. Additional blood with volume Vb and resistivity ρb enters the leg and is distributed uniformly in the leg. Derive an expression that relates the c

PFT Equipment: Pulmonary Function Testing Machines (2025)