Patent ID: 9433358
Filing Date: 2016-09-06
CPC Classification: A61B,G06K,G16H

Claim Text:
1. A method of estimating an internal, central arterial blood pressure waveform from pressure waveforms obtained from at least one blood pressure cuff placed at two locations along a brachial artery of a patient's arm, based on a physical model of the artery, said method comprising the steps of: a. inflating a proximal blood pressure cuff on the artery of the arm to a supra-systolic pressure; b, sensing a proximal cuff pressure waveform associated With at least one cardiac ejection cycle; c. inflating a distal blood pressure cuff on the artery of the arm to a supra-systolic pressure; d. sensing a distal cuff pressure waveform associated with at least one cardiac ejection cycle; e. using a processor, calculating the time of propagation of a blood pressure pulse from the entry of the said artery to the proximal cuff; f. using said processor, calculating the time of propagation of a blood pressure pulse from the proximal cuff to the distal, cuff; g. using said processor, calculating a reflection coefficient a blood pressure pulse at at least one of the proximal and distal cuffs; and h. based on said physical model of wave propagation along said artery between an aorta and said proximal and distal blood pressure cuffs and using said processor, determining an estimated internal, central arterial blood pressure waveform at the opening of the said artery.