BKAT Critical Care Practice Exam 2025 - Free Critical Care Practice Questions and Study Guide

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What is the normal range for arterial blood gas (ABG) PaCO2?

25 - 35 mm Hg

30 - 40 mm Hg

35 - 45 mm Hg

The normal range for arterial blood gas (ABG) PaCO2 is 35 - 45 mm Hg. This value reflects the partial pressure of carbon dioxide in the arterial blood, which is essential for assessing a patient’s respiratory function and the adequacy of ventilation. If the PaCO2 falls below this range, it suggests hyperventilation or respiratory alkalosis, while levels above this range indicate hypoventilation or respiratory acidosis. Understanding the normal range is critical for interpreting ABG results accurately and managing respiratory conditions effectively.

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40 - 50 mm Hg

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