title: Tetrapolar electrode system for measuring physiological events by impedance.
authors.affiliation: William A. Hillenbrand Biomedical Engineering Center, Purdue University, West Lafayette, IN 47907.
authors.forename: A O
authors.initials: AO
authors.lastname: Ragheb
authors.forename: L A
authors.initials: LA
authors.lastname: Geddes
authors.forename: J D
authors.initials: JD
authors.lastname: Bourland
authors.forename: W A
authors.initials: WA
authors.lastname: Tacker
mesh_terms: D004553:Electric Conductivity; D004566:Electrodes; D004594:Electrophysiology / Q000379:methods*; D006801:Humans; D012119:Respiration / Q000502:physiology