Abstract: The evaluation apparatus is an apparatus for evaluating chest compression, and includes a measuring unit, a compression position evaluation unit, and an instruction unit. The measuring unit obtains numerical values relating to temporal changes in a total hemoglobin concentration, an oxygenated hemoglobin concentration, and a deoxygenated hemoglobin concentration of the head. The compression position evaluation unit determines whether compression position on a sternum is appropriate based on a first indicator and a second indicator, the first indicator relating to a temporal change ratio of the oxygenated hemoglobin concentration with respect to the temporal change in the total hemoglobin concentration, and the second indicator relating to a correlation between the temporal change in the oxygenated hemoglobin concentration and the temporal change in the deoxygenated hemoglobin concentration.

Abstract: A defibrillator is an apparatus for defibrillation, and includes an oxygen saturation (TOI) measurement unit for acquiring a numerical value related to an oxygen saturation of a patient, an electrocardiogram (ECG) measurement unit for measuring an electrocardiogram of the patient in order to determine whether an electrical shock is required for the patient, and a control unit for starting measurement of the electrocardiogram of the patient in the electrocardiogram measurement unit on the condition that the numerical value acquired in the oxygen saturation measurement unit exceeds a threshold value.