[Noninvasive determination of oxyhemoglobin in arterial blood]

The authors describe the principles of noninvasive measurements of oxyhemoglobin content in the arterial blood by processing the signals obtained as a result of passing the light waves of the infrared (940 nm) and red (660 nm) wave bands through tissues. The data obtained with the first Russian pulse oximeter and with the hemoximeter were found to coincide. The diagnostic value of oximetry is discussed.