Method of and apparatus for measuring lactic acid in organism

摘要

A light source part (2) emits light of a plurality of wavelengths of a near infrared region, and a spectroscopic part (8) selects a wavelength subjected to absorption by lactic acid as a measuring wavelength from measuring light of a plurality of wavelengths emitted from the light source part (2). A probe (4) comes into contact with an organism measuring portion (1) and irradiates the organism measuring portion (1) with the measuring light of the wavelength selected by the spectroscopic part (8), while a photoreceiving part (6) detects transmitted/scattered light of the measuring light incident upon the organism measuring portion (1). A light signal detected by the photoreceiving part (6) is converted to absorbance in a signal processing part (14), so that the concentration of lactic acid is calculated by a host computer (16) serving as an arithmetic.control part and displayed on a display part (18). No reagent is required, while difference between lactic acid concentrations varied with measuring portions can also be noninvasively measured.