| 摘要 |
<p>Provided is an arterial endothelial function biometric device capable of obtaining a very precise normalized index value. Constants (A and tau) that represent changes in a previously determined basal section (B2) of a change curve (B) are determined, the change curve (B) representing the shear rate (µ), which is calculated from the blood flow velocity (u) that increases rapidly upon tourniquet release and subsequently decreases. Based on the constants (A and tau), the apex (B1) of the change curve (B) is estimated and, based at least on the estimated apex (F1) thereof, the integrated value (AUC) of the shear rate (µ) is calculated. Because the apex (B1) of the change curve (B) is thus estimated on the basis of the constants (A and tau), the apex approaches the apex (D1) of the theoretical value change curve (D) and noise is eliminated. Since the integrated value (AUC) of the shear rate (µ) is thereby calculated based at least on the apex (F1) of the estimated noiseless change curve (F), the integrated value (AUC) thereof can be quantified more precisely than in the past and a very precise normalized index value can be obtained.</p> |
