CONCENTRATION-MEASUREMENT DEVICE AND CONCENTRATION-MEASUREMENT METHOD
First Claim
1. A concentration measurement apparatus measuring a temporal relative change amount of at least one of total hemoglobin concentration, oxygenated hemoglobin concentration, and deoxygenated hemoglobin concentration in the head that vary due to repetition of chest compression, comprising:
- a light incidence section making measurement light incident on the head;
a light detection section 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 measurement light; and
a calculation section determining, based on the detection signal, the temporal relative change amount of at least one of the total hemoglobin concentration, the oxygenated hemoglobin concentration, and the deoxygenated hemoglobin concentration, whereinthe calculation section determines the temporal relative change amount from which frequency components less than a predetermined frequency are removed by a filtering process.
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Accused Products
Abstract
A concentration measurement apparatus measures a temporal relative change amount (ΔcHb, ΔO2Hb) of either or both of total hemoglobin concentration and oxygenated hemoglobin concentration in the head that vary due to repetition of chest compression, and includes a light incidence section making measurement light incident on the head, a light detection section detecting the measurement light propagated through the interior of the head and generating a detection signal in accordance with the intensity of the measurement light, and a CPU determining, based on the detection signal, the relative change amount (ΔcHb, ΔO2Hb) and performing a filtering process of removing frequency components less than a predetermined frequency from frequency components contained in the relative change amount (ΔcHb, ΔO2Hb).
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Citations
14 Claims
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1. A concentration measurement apparatus measuring a temporal relative change amount of at least one of total hemoglobin concentration, oxygenated hemoglobin concentration, and deoxygenated hemoglobin concentration in the head that vary due to repetition of chest compression, comprising:
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a light incidence section making measurement light incident on the head; a light detection section 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 measurement light; and a calculation section determining, based on the detection signal, the temporal relative change amount of at least one of the total hemoglobin concentration, the oxygenated hemoglobin concentration, and the deoxygenated hemoglobin concentration, wherein the calculation section determines the temporal relative change amount from which frequency components less than a predetermined frequency are removed by a filtering process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14)
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12. A concentration measurement method of measuring a temporal relative change amount of at least one of total hemoglobin concentration, oxygenated hemoglobin concentration, and deoxygenated hemoglobin concentration in the head that vary due to repetition of chest compression, the method comprising:
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a light incidence step of making measurement light incident on the head; a light detection step of 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 measurement light; and a calculation step of determining, based on the detection signal, the temporal relative change amount of at least one of the total hemoglobin concentration, the oxygenated hemoglobin concentration, and the deoxygenated hemoglobin concentration, wherein the calculation step determines the temporal relative change amount from which frequency components less than a predetermined frequency are removed by a filtering process.
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Specification