FREMGANGSMAATE OG INNRETNING FOR BESTEMMELSE AV TRYKK-DIAMETER-FORHOLDET FOR EN ARTERIE VED HJELP AV IKKE-INVASIVE FORANSTALTNINGER.

摘要

This method for establishing the pressure-diameter relationship of an artery employs the measurement results from a non-invasive sensor (3) of the artery diameter, for instance of the humeral artery, and from a non-invasive sensor (4) of the blood pressure applied for instance to the end of a finger. The measurement locations being separated by a distance DELTA x, the method provides for the correction of the pressure measurements as if such measurements had been effected at the location of the diameter measurements. The method further provides a correction which takes into account the mechanical properties of the artery, defined by the parameters alpha , beta , gamma , . . . and which are calculated, if necessary by successive iterations, until the pressure-diameter curve appears free from all measurement anomalies (hysteresis). The pressure-diameter relationship enables the calculation of the mechanical properties of the artery, in particular by compliance curves and the propagation velocity as a function of the pressure.