Noninvasive carbon dioxide monitoring.
Technical aspects and clinical applications of the two most commonly used noninvasive CO2 monitors, capnography and transcutaneous monitoring, are discussed. Neither accurately reflect PaCO2 in most critically ill patients. However, both monitors give valuable information about other aspects of the patient's physiology. PETCO2 reflects changes in pulmonary perfusion and deadspace ventilation; and, PtcCO2 reflects changes in peripheral perfusion. Thus, both are useful in the critically ill patient, but not necessarily for the assessment of PaCO2.
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M C
MC
Emory University School of Medicine, Atlanta, Georgia.
D001785:Blood Gas Monitoring, Transcutaneous; D002245:Carbon Dioxide / Q000097:blood*; D006801:Humans; D007259:Infrared Rays; D013058:Mass Spectrometry; D008991:Monitoring, Physiologic; D012126:Respiratory Dead Space
D002245:Carbon Dioxide