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

The correct approach to spirometer calibration is to ensure accuracy within 3% or 50 mL, whichever is greater. This standard helps maintain the integrity of lung function measurements, which are critical for diagnosing and managing respiratory conditions.

Spirometers must be calibrated regularly to provide reliable data, and the specified tolerance levels are designed to account for the precision necessary in clinical settings. Calibration within these parameters ensures that the readings reflect true lung capacity and function, which is essential for both accurate diagnostics and treatment plans. Deviations beyond this range could lead to misinterpretation of a patient's respiratory status, potentially affecting clinical decisions and outcomes.

While more stringent calibration standards may be appropriate in some settings, the specified range of 3% or 50 mL provides a practical balance between precision and feasibility for routine clinical use.