| http://www.w3.org/ns/prov#value | - Current pulse oximeters employ two wavelengths to detect blood oxygenation, as discussed in this report:The pulse oximeter calculates the absorption based on two physical principles: the two wavelengths of light are absorbed differently by oxygenated hemoglobin and deoxygenated hemoglobin; and tissues such as bone and fat and venous blood absorb a relatively constant amount of light, producing a r
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