Title :
Effects of rapid onset acceleration on cephalic pulsatile blood volume impedance waveforms in humans
Author :
Shender, Barry S.
Author_Institution :
US Naval Air Dev. Center, Warminster, PA, USA
Abstract :
Electrical impedance plethysmographic measurements of the relative changes in cephalic pulsatile blood volume (rheoencephalography, or REG) have been performed clinically for many years. REG indices provide information about cerebral vascular resistance (CVR). The technique has been used to noninvasively monitor real-time cephalic pulsatile blood volume changes in humans exposed to acceleration stress in the head-to-foot direction (+Gz) on the Naval Air Development Center (NADC) human centrifuge. Changes in the REG waveform occurring with increasing +Gz load have been characterized
Keywords :
aerospace biophysics; bioelectric phenomena; biomedical measurement; biorheology; brain; electric impedance; haemodynamics; patient monitoring; REG; acceleration stress; aerospace biophysics; brain; cephalic pulsatile blood volume impedance waveforms; cerebral vascular resistance; electrical impedance plethysmographic measurement; head-to-foot direction; human centrifuge; humans; noninvasive monitoring; rapid onset acceleration; rheoencephalography; Acceleration; Blood; Electric resistance; Electric variables measurement; Electrical resistance measurement; Humans; Immune system; Impedance measurement; Performance evaluation; Volume measurement;
Conference_Titel :
Bioengineering Conference, 1989., Proceedings of the 1989 Fifteenth Annual Northeast
Conference_Location :
Boston, MA
DOI :
10.1109/NEBC.1989.36734
