Certified Pulmonary Function Technologist (CPFT) Practice Exam

What is the gas concentration slope percent for CO2 calibration in a blood gas analyzer?

1. 5%

2. 10%

3. 15%

4. 20%

The correct answer is: 10%

The gas concentration slope percent for CO2 calibration in a blood gas analyzer is typically set at 10%. This value is critical because it reflects the accuracy of the analyzer's performance in detecting CO2 levels in blood samples. Calibration ensures that the analyzer can provide precise and reliable results, as a slope concentration of 10% indicates a certain level of sensitivity and responsiveness to changes in CO2 concentration, which is essential for diagnosing and managing respiratory and metabolic conditions. In blood gas analysis, CO2 is a vital parameter, and understanding its concentration helps clinicians assess a patient's acid-base balance and respiratory function. A calibration slope that is set appropriately allows for accurate linearity in measurement and assures that any detected changes in CO2 levels are reflective of true physiological changes rather than measurement error. Thus, a 10% slope signifies that the analyzer is optimized for performance in this important area of patient care.