Non-invasive blood examination in front of the direction of

摘要

A noninvasive blood examination apparatus comprises a light source for illuminating a part of vital tissues including blood vessels, a photographing member for taking pictures of illuminated blood vessels and tissues, and an analysis member for analyzing a photographed image, the analysis member comprising an extraction element for extracting as an image density profile the image density distribution, which extends across the blood vessels, of a photographed image, a quantitization element for quantitizing the morphological characteristics of the profile, an arithmetic element for computing amounts of blood components on the basis of the quantitized characteristics, and an output element for outputting the computation results, the apparatus being capable of determining in real time with a high reproducibility the concentration of hemoglobin in the blood and hematocrit without sampling the blood.