PROBLEM TO BE SOLVED: To provide a concentration measuring device and a concentration measuring method that enable objective determination of whether or not a sternum is pressed appropriately.SOLUTION: A concentration measuring device measures a temporal relative variation (ΔcHb, ΔO2Hb or ΔHHb) in at least one of total hemoglobin concentration, oxygenated hemoglobin concentration and deoxygenated hemoglobin concentration in the head that vary due to repeated pressing of a sternum, and comprises: a light entering part for allowing a measuring beam to enter the head a light detection part for detecting the measuring beam transmitted inside the head and generating a detection signal corresponding to intensity of the measuring beam and a CPU 14 for obtaining the relative variation (ΔcHb, ΔO2Hb or ΔHHb) on the basis of the detection signal.COPYRIGHT: (C)2014,JPO&INPIT【課題】胸骨圧迫が適切に行われているか否かを客観的に判断することが可能な濃度測定装置及び濃度測定方法を提供する。【解決手段】濃度測定装置は、胸骨圧迫の繰り返しに起因して変動する、頭部の総ヘモグロビン濃度、酸素化ヘモグロビン濃度、及び脱酸素化ヘモグロビン濃度のうち少なくとも一つの時間的な相対変化量(ΔcHb、ΔO2Hb、ΔHHb)を測定する装置であって、頭部に測定光を入射する光入射部と、頭部の内部を伝搬した測定光を検出し、該測定光の強度に応じた検出信号を生成する光検出部と、この検出信号に基づいて、相対変化量(ΔcHb、ΔO2Hb、ΔHHb)を求めるCPU14とを備える。【選択図】図3
