Fig. 3
From: Laryngeal mask versus facemask in the respiratory management during catheter ablation
The representative data of the differential CO2 curves (bottom; magenta lines) from the capnography waveforms (top; blue lines). This was a respiratory waveform of the spontaneous respiration, recorded immediately before artificial ventilation management was initiated. a. Representative data in a patient using a laryngeal mask. b, c, d. Representative data in a patient using a facemask