Patent Document ID: 20090287097
Application ID: 12454123
Patent Flag: 0

Claim One:
1. A method of measurement of supra-systolic blood pressure waveforms obtained non-invasively from a brachial artery in an arm of a patient, using a blood pressure cuff and cuff pressure transducer, said method comprising the steps of: (a) inflating a blood pressure cuff on the patient's arm to a supra-systolic pressure; (b) measuring a succession of cuff pressure waveforms associated with the brachial artery representing at least one cardiac ejection cycle; (c) analyzing the cuff pressure waveforms using a mathematical model relating a heart-pulse synchronous cuff pressure signal and brachial pressure near the cuff to produce an estimated brachial pressure signal and pressure waveforms; (d) analyzing the estimated brachial pressure waveforms using a mathematical model relating the estimated brachial pressure signal and central pressure at the root of the brachial artery to produce estimated central artery pressures and pressure waveforms, wherein this mathematical model includes at least one parameter with physical meaning selected from the group consisting of an impedance relationship at the cuff and a parameter relating the phase of the pressure wave at substantially the subclavian root to the phase of the pressure wave at the occluding cuff; and (e) generating an output based on the analysis.