Title :
Noninvasive determination of arterial pressure and volume using tonometry [electric impedance plethysmography]
Author :
Drzewiecki, Gary ; Solanki, Bindu ; Wang, Jia-Jung ; Li, John K-J
Author_Institution :
Dept. of Biomed. Eng., Rutgers Univ., Piscataway, NJ, USA
Abstract :
An arterial tonometer is introduced that can measure arterial volume and pressure. The flexible diaphragm tonometer employs volume feedback control such that the contact surface is apparently rigid. When feedback is disabled, electrical impedance plethysmography of the tonometer compartment allows simultaneous measurement of pressure and volume change in the underlying artery. Applanation pressure is varied as well, to provide volume as function of pressure. It is also shown that a calibrated single artery volume waveform can be obtained for hemodynamic studies
Keywords :
bioelectric phenomena; biomedical equipment; biomedical measurement; blood pressure measurement; electric impedance measurement; feedback; volume measurement; apparently rigid contact surface; arterial tonometer; calibrated single artery volume waveform; electrical impedance plethysmography; flexible diaphragm tonometer; hemodynamic studies; medical instrumentation; noninvasive determination; variable applanation pressure; volume feedback control; Arteries; Blood pressure; Contacts; Electric variables measurement; Feedback control; Impedance measurement; Plethysmography; Pressure measurement; Surface impedance; Volume measurement;
Conference_Titel :
ELECTRO '96. Professional Program. Proceedings.
Conference_Location :
Somerset, NJ
Print_ISBN :
0-7803-3271-7
DOI :
10.1109/ELECTR.1996.501212
