Patent ID: 6176832
Filing Date: 2001-01-23
Classification: A61B

Abstract:
A cardiovascular information measurement system characterized by comprising:sectional shape detection means for simultaneously detecting sectional shapes of at least two arterial portions;cross-sectional area calculation means for calculating cross-sectional areas of the two arterial portions on the basis of the sectional shapes detected by said sectional shape detection means;flow velocity calculation means for calculating an average blood flow velocity in an artery on the basis of the cross-sectional areas calculated by said cross-sectional area calculation means;pulse wave velocity calculation means for calculating a pulse wave propagation velocity between the two arterial portions in accordance with time changes in the sectional shapes of the two arterial portions which are detected by said sectional shape detection means;relative blood pressure calculation means for calculating a relative blood pressure value to a reference blood pressure value obtained in a specific time phase, on the basis of the blood flow velocity calculated by said flow velocity calculation means and the pulse wave velocity calculated by said pulse wave velocity calculation means; andabsolute blood pressure calculation means for calculating an absolute blood pressure value on the basis of the relative blood pressure value and the reference blood pressure value obtained in the specific time phase and measured in advance.