A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
354/22
A61B 5/022 (2006.01)
Patent
CA 2011639
METHOD AND APPARATUS FOR ESTABLISHING THE PRESSURE-DIAMETER RELATIONSHIP OF AN ARTERY BY NON-INVASIVE MEASURES ABSTRACT OF THE DISCLOSURE 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 separ- ated by a distance .DELTA.x, the method provides for the correc- tion of the pressure measurements as if such measurements had been effected at the location of the diameter mesure- ments. The method further provides a correction which takes into account the mechanical properties of the artery, defin- ed by the parameters .alpha. , .beta., .gamma. ... and which are calculat- ed, if necessary by successive iterations, until the pres- sure-diameter curve appears free from all measurement anom- alies (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.
Meister Jean-Jacques
Tardy Yanik
Asulab S.a.
Gowling Lafleur Henderson Llp
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