Impedance plethysmography is a technique that can be used to detect thrombosis—the presence of clots in a blood vessel—by measuring the electrical resistance of a limb, such as the calf of the leg. In a typical clinical setting, a current of 200 mA is passed through the leg from the upper thigh to the foot. The voltage is measured at two points along the calf separated by 13 cm.a. If the voltage measured is 17 mV, what is the resistance of the calf between the electrodes?b. If the average calf diameter between the electrodes is 12 cm, what is the average resistivity of this part of the leg?
Impedance plethysmography is a technique that can be used to detect thrombosis—the presence of clots in a blood vessel—by measuring the electrical resistance of a limb, such as the calf of the leg. In a typical clinical setting, a current of 200 mA is passed through the leg from the upper thigh to the foot. The voltage is measured at two points along the calf separated by 13 cm.a. If the voltage measured is 17 mV, what is the resistance of the calf between the electrodes?b. If the average calf diameter between the electrodes is 12 cm, what is the average resistivity of this part of the leg?
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter29: Direct Current (dc) Circuits
Section: Chapter Questions
Problem 49PQ: Three resistors with resistances R1 = R/2 and R2 = R3 = R are connected as shown, and a potential...
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Impedance plethysmography is a technique that can be used to detect thrombosis—the presence of clots in a blood vessel—by measuring the electrical resistance of a limb, such as the calf of the leg. In a typical clinical setting, a current of 200 mA is passed through the leg from the upper thigh to the foot. The voltage is measured at two points along the calf separated by 13 cm.
a. If the voltage measured is 17 mV, what is the resistance of the calf between the electrodes?
b. If the average calf diameter between the electrodes is 12 cm, what is the average resistivity of this part of the leg?
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