| 摘要 |
<p>The invention is a method for calculating from the contours of the pressure pulses in the brachial, carotid and radial arteries the absolute systolic pressure, the degree of augmentation, and the contour of the pressure pulse wave in the ascending aorta. The pressure in the ascending aorta is related to a combination of a primary pressure pulse and a secondary pressure wave which is a reflection of the primary pressure pulse from the periphery of the body. The maximum central arterial pressure can be determined from an analysis of the contour of the pressure pulses in the peripheral arteries, and the relationship between the peaks in the pulses relating to the maximum primary pressure and the maximum secondary wave pressure. The inventive system determines the positions of the two peaks and then analyses their amplitudes to ascertain the maximum systolic pressure in the central arteries and the amount of augmentation. Transfer functions relating the measured peripheral artery pressure pulses to the ascending aorta pressure pulses developed from an analysis of the pressure pulse waves of a number of individuals using Fourier transform techniques are used to determine the contour of the ascending aorta pressure pulse based on the measured peripheral pulses.</p> |
