Device and method for monitoring body fluid and electrolyte disorders

The device and method of measuring the evaluation index relevant to the humors using an optical light measurement spectroscopic method which may be used in order to make easy the diagnosis and the remedial operation towards recovery of humors balance are offered. With 1 enforcement form, the quantity of a patient's non-adipose tissue carries out the present invention comparatively using spectrophotometry, and it offers the device which measures the evaluation index of the water content of body tissue. This device is connected to the probe housing and; housing which were constituted so that it might be arranged at the proximity of the organization position which it is going to monitor, It is connected to the luminescence optical element and; housing which were constituted so that radiation might be turned to an organization position, It is the processing device constituted so that an evaluation index might be calculated by processing the radiation from a photon detection optical element, ; luminescence optical element, and a photon detection optical element constituted so that radiation might be received from an organization position, An evaluation index contains the processing device containing the ratio of a part of water content a patient's organization to the quantity of the low-fat tissue of some a patient's organizations, or non-adipose tissue.