Influence of Head and Neck Position on Oropharyngeal Leak Pressure and Cuff Position with the ProSeal Laryngeal Mask Airway and the I-Gel: A Randomized Clinical Trial

Table 4

Oropharyngeal leak pressures and ventilation with I-gel.

Parameter	Neutral	Flexion	Extension	Lateral rotation
Oropharyngeal leak pressures (LAW) (cm H2O)	22 ± 3.23	25 ± 3.64^*	19 ± 2.61^#	22 ± 2.74
Ventilation score (3/2/1/0)	30/0/0/0	30/0/0/0	29/1/0/0	30/0/0/0
Peak airway pressures (cm H2O)	15 ± 2.99	17 ± 5.25	15 ± 3.39	16 ± 3.24
Expiratory tidal volume (mL)	481 ± 48.69	481 ± 52.67	477 ± 50.69	478 ± 49.63
LAW-PAW (cm H2O)	6 ± 4.86	7 ± 6.23	3 ± 4.46^®	6 ± 4.77
EtCO2 (mm Hg)	31 ± 2.27	31 ± 2.02	31 ± 2.10	31 ± 2.07

Data shown are mean ± SD or numbers. value is in comparison with the neutral position.
^* < 0.001 between neutral and flexion, ^# < 0.001 between neutral and extension.
< 0.001 between neutral and flexion, ^® < 0.001 between neutral and extension.