Certified Respiratory Therapist Exam 2025 – 400 Free Practice Questions to Pass the Exam

A complete blood gas (CBG) analysis is essential for assessing a patient’s respiratory function and metabolic balance. Option B includes the key components measured in a CBG analysis: pH, which indicates the acidity or alkalinity of the blood; PaO2, the partial pressure of oxygen, which reflects how well oxygen can move from the lungs to the blood; PaCO2, the partial pressure of carbon dioxide, which helps evaluate respiratory function; bicarbonate (HCO3), a measure of metabolic component; and oxygen saturation (SaO2), which indicates the percentage of hemoglobin saturated with oxygen.

These components collectively provide critical information on a patient's acid-base status, respiratory effectiveness, and overall oxygenation, allowing healthcare providers to make informed clinical decisions.

The other options lack the necessary components for a complete blood gas analysis. White blood cells and blood pressure, as seen in the first option, are important for evaluating immune response and general cardiovascular health but do not indicate respiratory function or acid-base balance. The third option lists heart rate and oxygen consumption, neither of which are direct measurements included in a CBG analysis. Glucose levels and humidity mentioned in the last option are also irrelevant to blood gas status. Each of these components serves different diagnostic