Which substances are typically measured by a blood gas analyzer?

Blood gas analyzers are specialized instruments used primarily in clinical laboratories to assess the gas exchange status of a patient. They measure parameters that are critical for understanding respiratory function and metabolic status. The functions of a blood gas analyzer typically include measuring arterial blood gases, which are essential for evaluating conditions such as acidosis, alkalosis, and respiratory distress.

The correct substances measured by a blood gas analyzer include pH levels, partial pressures of oxygen and carbon dioxide, bicarbonate levels, and base excess, all of which are crucial for assessing the acid-base balance and respiratory function. Hematocrit and hemoglobin may be important for evaluating blood status but are usually determined using different laboratory methods or equipment rather than a blood gas analyzer.

In the context of the options provided, the correct response focuses on substances measured that are intrinsic to gas exchange and acid-base balance. While glucose, lactate, and bilirubin are measured in other types of analyses for metabolic assessments, they do not fall within the primary capability of a blood gas analyzer. Additionally, cholesterol and triglycerides relate to lipid profiling, which is outside the function of this specific analyzer. Thus, the focus on relevant clinical values in this case affirms the importance of pH levels, which are directly related to