You searched for: “impedance plethysmographs
impedance plethysmograph (s), impedance plethysmographs (pl) (nouns)
1. An instrument that uses gas-to-tissue ratio to set an alarm or to measure a volume.
2. A technique for determining blood vessel occlusion that determines volumetric changes in a limb by measuring changes in its girth as indicated by changes in the electric impedance of mercury-containing polymeric silicone tubes in a pressure cuff.