Which sign indicates that a supraglottic airway is not providing adequate ventilation?

Which sign indicates that a supraglottic airway is not providing adequate ventilation?

• A. Inadequate chest rise and poor capnography waveform
• B. Hyperventilation
• C. No change in chest movement
• D. Excellent chest rise and normal capnography

Answer: (A)

When assessing ventilation with a supraglottic airway, you gauge effectiveness by two real-time cues: how well the chest rises with each breath and what the capnography tracing shows. Adequate ventilation produces visible chest rise and a normal, regular end-tidal CO2 waveform, reflecting air moving in and CO2 returning from the lungs. If the chest rise is inadequate and the capnography waveform is poor or absent, ventilation is not adequate. This combination points to issues like the device not sealing or seated correctly, airway obstruction, or a kink or leak in the circuit, all of which prevent enough air from reaching the lungs or CO2 from being expelled. Hyperventilation can occur with a sustained rate or tidal volume that’s fast, but it isn’t by itself a sign of poor ventilation if chest rise and the capnography waveform remain appropriate. Excellent chest rise with a normal capnography waveform clearly indicates good ventilation. No change in chest movement raises concern for little to no ventilation, but the most definitive indicator in this context is the presence of inadequate chest rise together with a poor capnography waveform.

When assessing ventilation with a supraglottic airway, you gauge effectiveness by two real-time cues: how well the chest rises with each breath and what the capnography tracing shows. Adequate ventilation produces visible chest rise and a normal, regular end-tidal CO2 waveform, reflecting air moving in and CO2 returning from the lungs.

If the chest rise is inadequate and the capnography waveform is poor or absent, ventilation is not adequate. This combination points to issues like the device not sealing or seated correctly, airway obstruction, or a kink or leak in the circuit, all of which prevent enough air from reaching the lungs or CO2 from being expelled.

Hyperventilation can occur with a sustained rate or tidal volume that’s fast, but it isn’t by itself a sign of poor ventilation if chest rise and the capnography waveform remain appropriate. Excellent chest rise with a normal capnography waveform clearly indicates good ventilation. No change in chest movement raises concern for little to no ventilation, but the most definitive indicator in this context is the presence of inadequate chest rise together with a poor capnography waveform.