Patent ID: 8395775

Claim:
A fluorescent agent concentration measuring apparatus comprising: an excitation light source to radiate excitation light to a sample containing a body fluid taken from a living body administered with a fluorescent drug, the excitation light allowing the drug to emit fluorescence; a fluorescence detection portion to detect the fluorescence; a fluorescent agent concentration calculation portion to calculate the concentration of the drug in the living body, based on a detection signal from the fluorescence detection portion; a curve data storage portion to pre-store, as a pattern, curve data that indicates a relation of concentrations of the drug in the living body at a plurality of times of day; and a peak time estimation portion configured to compare the elapsed time after administration of the drug to the living body and the calculated concentration of the drug with the pattern pre-stored in the curve data storage portion and configured to estimate the elapsed time after administration the concentration of the drug in the living body is at a peak.