Johnson Cc

Abstract: EVERAL investigators have shown that the 1) develops a 200-Hz pulse rate, which is S measurement of superior vena cava1.2 transmitted to the diode section (B, fig. 1) or pulmonary artery3.4 oxygen saturation to alternately activate the red (670 Nanom( S o , ) is an asset in managing unstable eters) and infrared (950 Nanometers) lightcardiac patients. Unfortunately, measureemitting diodes. These light pulses are ment of intermittent samples documents what has occurred in the recent past and is obviously of less value than is a continuous measurement technic. A recently commercially available in uiuo oximeter provides such continuous information. This report briefly outlines its principles of operation, the errors that may occur, its ieliability, and presents examples of its clinical use.