| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an instrument for measuring arterial elasticity capable of utilizing a merit to obtain a transmural pressure difference in a blood vessel in blood pressure measurement using a cuff in order to measure the arterial elasticity. <P>SOLUTION: In a process to measure blood pressure by using the cuff of a double cuff method, the blood vessel transmural pressure difference beneath the cuff is defined as zero when cuff pressure is systolic blood pressure, and a blood vessel volumetric change when the cuff pressure falls from the systolic blood pressure by prescribed pressure within 20mmHg is defined as the blood vessel volumetric change when the blood vessel transmural pressure difference beneath the cuff is imposed by prescribed pressure. The blood vessel volumetric change is calculated based on pressure pulse wave detected in blood pressure measurement through the use of air-pressure conversion relation acquired based on a cuff pressure change when prescribed air capacity is injected. The acquired blood vessel volumetric change is divided by the maximum volumetric change value of the pulse wave detected in the blood pressure measurement so as to perform normalization, and then, obtained as the elastic index of the blood vessel beneath the cuff. Accordingly, the influence of baroreflex from a cuff periphery is eliminated and also the edge effect of the cuff and an individual difference are made to be the minimum concerning the blood vessel elastic property measuring instrument. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
