Concentration-measurement device and concentration-measurement method

An apparatus for analyzing chest compression which is performed on a cardiopulmonary arrest person, the apparatus comprising:

• a light source configured to output measurement light with which the head of the cardiopulmonary arrest person is irradiated;
• a light detector configured to detect the measurement light that has propagated through the interior of the head and generate a detection signal in accordance with an intensity of the detected measurement light;
• and
• a processor electrically connected to the light detector and programmed to:
• determine, based on the detection signal, a temporal variation of at least one of total hemoglobin concentration, oxygenated hemoglobin concentration, and deoxygenated hemoglobin concentration, and
• calculate information related to a variation frequency of the temporal variation corresponding to a current frequency of the chest compression.

A method for analyzing chest compression, the method comprising:

• performing chest compression on a cardiopulmonary arrest person;
• irradiating the head of the cardiopulmonary arrest person with measurement light;
• detecting the measurement light that has propagated through the interior of the head and generating a detection signal in accordance with an intensity of the detected measurement light;
• determining a temporal variation of at least one of total hemoglobin concentration, oxygenated hemoglobin concentration, and deoxygenated hemoglobin concentration, based on the detection signal;
• and
• calculating information related to an amplitude of the temporal variation corresponding to a current strength of the chest compression.

An apparatus for analyzing chest compression which is performed on a cardiopulmonary arrest person, the apparatus comprising:

• a light source configured to output measurement light with which the head of the cardiopulmonary arrest person is irradiated;
• a light detector configured to detect the measurement light that has propagated through the interior of the head and generate a detection signal in accordance with an intensity of the detected measurement light;
• and
• a processor electrically connected to the light detector and programmed to:
• determine, based on the detection signal, a temporal variation of at least one of total hemoglobin concentration, oxygenated hemoglobin concentration, and deoxygenated hemoglobin concentration, and
• calculate information related to an amplitude of the temporal variation corresponding to a current strength of the chest compression.

A method for analyzing chest compression, the method comprising:

• performing chest compression on a cardiopulmonary arrest person;
• irradiating the head of the cardiopulmonary arrest person with measurement light;
• detecting the measurement light that has propagated through the interior of the head and generating a detection signal in accordance with an intensity of the detected measurement light;
• determining a temporal variation of at least one of total hemoglobin concentration, oxygenated hemoglobin concentration, and deoxygenated hemoglobin concentration, based on the detection signal;
• and
• calculating information related to an integrated value of the temporal variation corresponding to a current strength of the chest compression.

An apparatus for analyzing chest compression which is performed on a cardiopulmonary arrest person, the apparatus comprising:

• a light source configured to output measurement light with which the head of the cardiopulmonary arrest person is irradiated;
• a light detector configured to detect the measurement light that has propagated through the interior of the head and generate a detection signal in accordance with an intensity of the detected measurement light;
• and
• a processor electrically connected to the light detector and programmed to:
• determine, based on the detection signal, a temporal variation of at least one of total hemoglobin concentration, oxygenated hemoglobin concentration, and deoxygenated hemoglobin concentration, and
• calculate information related to an integrated value of the temporal variation corresponding to a current strength of the chest compression.