Table 1.

Tidal lung and tidal oesophageal volume, airway and oesophageal peak pressure for the intubating laryngeal mask and laryngeal tube and both self inflating bags

Laryngeal tube/
mask characteristics	Peak Paw (cmH2O)	Peak Poesoph (cmH2O)	VT lung (ml)	VT oesophagus (ml)
ILMA (before endotracheal intubation)
1100 ml bag	18 ± 2	0	674 ± 27	0
1500 ml bag	21 ± 2	0	790 ± 33*	0
ILMA (after endotracheal intubation)
1100 ml bag	25 ± 2*	0	623 ± 26	0
1500 ml bag	30 ± 3	0	741 ± 33*	0
Laryngeal tube
1100 ml bag	25 ± 2	0.1 ± 0.1	666 ± 31	0
1500 ml bag	27 ± 2	0.4 ± 0.4	752 ± 46	0

Data are expressed as mean ± standard error of the mean. P_aw, airway pressure; P_oesoph, oesophageal pressure; VT, tidal volume. ^*P < 0.05, versus 1100 ml self-inflating bag.