What could be a result of an occluded sample line in capnometry?

An occluded sample line in capnometry can indeed lead to a false low PETCO₂ reading. When the sample line is blocked, it prevents the accurate transport of exhaled carbon dioxide (CO₂) to the capnometer. This disruption in the flow will result in lesser or no CO₂ being detected by the device, which would generate a misleadingly low reading of the end-tidal CO₂ (PETCO₂) levels.

Understanding this phenomenon is crucial for respiratory care practitioners as false low readings could lead to inappropriate clinical decisions, such as misdiagnosing the patient's condition or neglecting necessary interventions. Proper monitoring and maintenance of the sample line are vital to ensure reliable measurements, which are essential for accurate assessment of the patient’s ventilation and overall respiratory status.