Patent ID: 6517495
Filing Date: 2003-02-11
Classification: A61B

Abstract:
A method for indirectly measuring blood pressure comprising:placing a cuff around a portion of a human being; inflating the cuff to a predetermined pressure; deflating the cuff at a predefined rate to produce a deflation pressure in the cuff which decreases with time; while the deflating is occurring, measuring pressure in the cuff thereby producing a plurality of cuff pressure measurements; deriving a oscillation pressure waveform from the plurality of cuff pressure measurements; identifying a first reference measurement and a second reference measurement in the plurality of cuff pressure measurements; identifying a first reference point and a second reference point on the oscillation pressure waveform; identifying a third reference point on the oscillation pressure waveform which corresponds to an occurrence of diastolic pressure in the human being; and determining diastolic pressure of the human being as a function of the first reference measurement, the second reference measurement, the first reference point, the second reference point, and the third reference point.