A rapid non-invasive blood pressure measurement method for discrete
value and full wave form determination.
Schnall, Robert P, Noam Gavriely, Shlomo Lewkowicz, and Yoram Palti.
Department of Physiology and Biophysics, Bruce Rappaport Faculty of
Medicine and the Rappaport Family Institute for Research in the
Medical Sciences Technion - Israel Institute of Technology, Haifa,
Israel
APStracts 2:0442A, 1995.
A new method for the non-invasive measurement of systemic arterial
blood pressure (BP) and its validation are described. The method
combines photo-plethysmography of the radial artery with E.C.G. -
gated, rapid release (600 mm Hg/sec) of occluding counter-pressure.
The release of the counter-pressure is precisely timed with the
E.C.G. signal, while photo-plethysmographic detection of the arterial
refilling is used to facilitate rapid, momentary, BP measurements.
Direct photo-plethysmography of the radial artery during its
reloading provides a very clear indication of the opening pressure.
The complete pressure waveform is reconstructed from multiple
repetitions of the BP measurement cycle at successively increasing
time intervals relative to the E.C.G. signal. In alternative mode of
operation, the systolic and diastolic values are rapidly measured
(i.e. within 2-4 cardiac cycles), at the peak and trough of the BP
wave. Blood pressure measurements by this new method were compared to
sphygmomanometric measurements in 26 randomly selected subjects
Received 18 April 1995; accepted in final form 29 August 1995.
APS Manuscript Number A145-5.
Article publication pending Journal of Applied Physiology.
ISSN 1080-4757 Copyright 1995 The American Physiological Society.
Published in APStracts on 6 November 95