9.0 Endo/Metabolic

     A: "The “oxygen saturation gap” is the difference between the calculated oxygen saturation from a standard blood gas machine and the reading from a pulse oximeter. If it is greater than 5%, the patient’s hemoglobin may be abnormal, representing carbon monoxide poisoning, methemoglobinemia, or sulfhemoglobinemia."

Jawaid Akhtar MD, Bradford D. Johnston MD, Edward P. Krenzelok, PHARMD. MIND THE GAP. The Journal of Emergency Medicine, Vol. 33, No. 2, pp. 131–132, 2007.

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