Professional and Linguistic Assessments Board (PLAB) Practice Exam

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What is the normal PO2 range in kPa?

8-12
10-14
6-9
4-8

The correct answer is: 10-14

The normal range for partial pressure of oxygen (PO2) in arterial blood is typically between 10 to 14 kPa. This range reflects the ability of the lungs to efficiently oxygenate blood and is crucial for proper assessment of respiratory function. A PO2 of 10 to 14 kPa indicates adequate oxygenation, necessary for cellular functions and maintaining overall health. Values outside this range can indicate potential respiratory or oxygenation issues, making it vital for healthcare professionals to understand these normal parameters when evaluating a patient’s respiratory status. Understanding the importance of this range is essential for identifying and managing conditions such as hypoxemia, where the oxygen levels in the blood fall below normal, necessitating timely intervention.