Method of and apparatus for measuring lactic acid in organism
First Claim
1. A measuring apparatus for lactic acid concentration in an organism comprising:
- a light source part emitting an input light having a wavelength in a near infrared region wherein said wavelength is a wavelength whose correlation coefficient between said lactic acid concentration and absorbance is at least 0.8 in aqueous lactic acid solution measurement;
a probe for coming into contact with a tissue measuring portion for irradiating said tissue measuring portion with said input light from said light source part;
a photoreceiving part for detecting an intensity of an output light being received from said tissue measuring portion; and
an arithmetic part for calculating a lactic acid concentration on the basis of said intensity of said out put light at one or a plurality of measuring wavelengths, detected by said photoreceiving part, being subjected to absorption.
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Abstract
A light source pa light of a plurality of wavelengths of a near infrared region, and a spectroscopic part 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. A probe comes into contact with an organism measuring portion and irradiates the organism measuring portion with the measuring light of the wavelength selected by the spectroscopic part, while a photoreceiving part detects transmitted/scattered light of the measuring light incident upon the organism measuring portion. A light signal detected by the photoreceiving part is converted to absorbance in a signal processing part, so that the concentration of lactic acid is calculated by a host computer serving as an arithmetic-control part and displayed on a display part. No reagent is required, while difference between lactic acid concentrations varied with measuring portions can also be noninvasively measured.
37 Citations
17 Claims
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1. A measuring apparatus for lactic acid concentration in an organism comprising:
- a light source part emitting an input light having a wavelength in a near infrared region wherein said wavelength is a wavelength whose correlation coefficient between said lactic acid concentration and absorbance is at least 0.8 in aqueous lactic acid solution measurement;
a probe for coming into contact with a tissue measuring portion for irradiating said tissue measuring portion with said input light from said light source part; a photoreceiving part for detecting an intensity of an output light being received from said tissue measuring portion; and an arithmetic part for calculating a lactic acid concentration on the basis of said intensity of said out put light at one or a plurality of measuring wavelengths, detected by said photoreceiving part, being subjected to absorption. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- a light source part emitting an input light having a wavelength in a near infrared region wherein said wavelength is a wavelength whose correlation coefficient between said lactic acid concentration and absorbance is at least 0.8 in aqueous lactic acid solution measurement;
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11. A measuring method for quantitatively analyzing an intravital lactic acid concentration in an organism comprising the steps of:
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irradiating said organism with an input light having a near infrared measuring wavelength whose correlation coefficient between said lactic acid concentration and absorbance is at least 0.8 in aqueous lactic acid solution measurement; detecting an intensity of an output light at said measuring wavelength emitting from said organism; and
determining a concentration of said intravital lactic acid quantitatively on the basis of said output light intensity. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification