Plethysmography, Impedance

**Definition:** Recording changes in electrical impedance between electrodes placed on opposite sides of a part of the body, as a measure of volume changes in the path of the current. (Stedman, 25th ed)

**Tree numbers:** - E01.370.370.610.610 - E01.370.405.610

**Synonyms:** - Impedance Plethysmography - Rheography