PROBLEM TO BE SOLVED: To provide a concentration measuring apparatus in which an operator or the like is enabled to easily confirm a brain oxygen condition when chest compression is intercepted, and a concentration measuring method.SOLUTION: A concentration measuring apparatus comprises a probe 20 including a light incidence section which makes measuring light incident to the head and a light detection section which detects the measuring light propagated within the head, a CPU 14 which determines a temporal relative variation of an oxidized hemoglobin concentration and performs filter processing for removing a frequency component smaller than a predetermined frequency from frequency components contained in the relative variation, and a display section 15 which displays first time-series data indicating the relative variation after the filter processing. The CPU 14 determines the presence/absence of chest compression. In the case where the chest compression is not performed for a predetermined time, the display section 15 switches from the first time-series data to second time-series data indicating a relative variation containing the frequency component smaller than the predetermined frequency and displays the second time-series data.COPYRIGHT: (C)2013,JPO&INPIT【課題】胸骨圧迫の中断時における脳酸素状態を施行者等が容易に確認することが可能な濃度測定装置および濃度測定方法を提供する。【解決手段】濃度測定装置は、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する光検出部とを有するプローブ20と、酸素化ヘモグロビン濃度の時間的な相対変化量を求め、該相対変化量に含まれる周波数成分のうち所定周波数より小さい周波数成分を除去するフィルタ処理を行うCPU14と、フィルタ処理後の相対変化量を示す第1の時系列データを表示する表示部15とを備える。CPU14は、胸骨圧迫の有無を判定する。胸骨圧迫が所定時間行われない場合に、表示部15は、所定周波数より小さい周波数成分を含む相対変化量を示す第2の時系列データを、第1の時系列データから切り替えて表示する。【選択図】図3
