A sudden loss of PetCO2 is most commonly due to which event?

A sudden loss of PetCO2 is most commonly due to which event?

• A. Complete Disconnect
• B. Ventilator Circuit Failure
• C. Self Extubation
• D. Kinked Tube

Answer: (C)

When the end-tidal CO2 trace suddenly disappears, it means CO2 is no longer being delivered from the lungs to the airway. This happens most commonly when the airway is abruptly interrupted by the patient pulling out the endotracheal tube, i.e., self-extubation. Without a secure airway, there is no CO2 exhaled in the airway, so the capnography waveform drops to zero immediately. While issues like a circuit disconnect or ventilator malfunction can also terminate the trace, they’re less common and are usually accompanied by alarms or changes in airway pressures. In the event of suspected self-extubation, rapidly assess the airway, provide oxygen, and be prepared to re-establish ventilation if needed.

When the end-tidal CO2 trace suddenly disappears, it means CO2 is no longer being delivered from the lungs to the airway. This happens most commonly when the airway is abruptly interrupted by the patient pulling out the endotracheal tube, i.e., self-extubation. Without a secure airway, there is no CO2 exhaled in the airway, so the capnography waveform drops to zero immediately. While issues like a circuit disconnect or ventilator malfunction can also terminate the trace, they’re less common and are usually accompanied by alarms or changes in airway pressures. In the event of suspected self-extubation, rapidly assess the airway, provide oxygen, and be prepared to re-establish ventilation if needed.