When Analyzing an ABG Sample from a Patient with Acute

question 56

Multiple Choice

When analyzing an ABG sample from a patient with acute respiratory distress syndrome and refractory hypoxemia, you notice a PaO₂ of 141 mm Hg and a PaCO₂ of 14 mm Hg. Which of the following analytic errors should you suspect?

• A) Excessive time since sample collection
• B) Exposure of the blood sample to air
• C) Excessive heparin in the sample
• D) Sample admixture with venous blood

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