Patent ID: 8100835

Claim:
A method of determining physiological life signs using a non-invasive phlethysmograph having a heartbeat pulse sensor and a memory component, comprising the steps of: a) bringing a heartbeat pulse sensor of a phlethysmograph into contact with the surface of a patient's skin at point proximate an artery, b) measuring with said heartbeat pulse sensor at least one of arterial blood vessel displacement and blood pressure changes, c) collecting from said heartbeat pulse sensor a first data stream of measurements of step (b) and storing said data stream of measurements of step (b) within a memory component, d) extracting from a set of parameters from the collected data stored within said memory component, a number of physiological life signs parameters, e) calculating delay time between a primary systolic pulse and an iliac reflection pulse, f) calculating pulse blood pressure from said calculation of the delay time between the primary pulse and the iliac reflection, g) repeating steps (b) through (f) continuously for a predetermined period of time and collecting in a memory component a second data stream of measurements of the delay time between the primary pulse and the iliac reflection, and h) calculating pulse blood pressure variations from said data stream of measurements of the delay time between the primary pulse and the iliac reflection.