Cyanosis as a Guide to Arterial Oxygen Desaturation
نویسندگان
چکیده
It is known that the presence or absence of cyanosis of warm parts is some guide to the level of arterial oxygen saturation. Comroe and Botelho (1947) exposed the limitations of cyanosis as a sign, but their observations were made in bright light on normal subjects, who inhaled decreasing percentages of oxygen in nitrogen. Some sites commonly used for the detection of central cyanosis, such as the tongue and inner lips, were not inspected, presumably for technical reasons. The present investigation set out to assess the reliability of cyanosis of various parts of the body as a guide to arterial oxygen desaturation in patients under ordinary ward conditions. An attempt has been made to explain such discrepancies as were discovered.
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