Q:

A patient in the emergency department is receiving oxygen via a nonrebreather at 15 L/min. There ABG results are as follows:

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A patient in the emergency department is receiving oxygen via a nonrebreather at 15 L/min. There ABG results are as follows:

pH 7.21

PaCO2 38 torr

PaO2 569 torr

SpO2 100%

HCO3 23 mEq/L

BE -1

Which of the following is the best interpretation for these results?


  1. Respiratory acidosis
  2. Metabolic acidosis
  3. Laboratory error
  4. Large physiologic shunt

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