If the infrared device used for capnography is not functioning properly, what would be the expected outcome related to PECO2 readings?

When the infrared device used for capnography is not functioning properly, the expected outcome is that the PECO2 readings would become inconsistent or unreliable. This is primarily due to the reliance of the infrared sensor on accurate absorption of infrared light by carbon dioxide molecules. If the device is malfunctioning, it may not be able to detect these molecules effectively, leading to variable readings.

Inconsistent readings can be caused by several factors including calibration issues, blockages in the sampling line, or other technical failures that compromise the ability of the device to provide accurate measurements. Therefore, patients' actual CO2 production may not be accurately reflected in these readings, making them unreliable for assessing ventilation status.

This outcome highlights the importance of regularly checking and ensuring the functionality of monitoring devices, especially in clinical situations where accurate gas measurements are critical for patient management.