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 8

Ventilation parameters, airway parameters, and Brimacombe scores of the devices.

Ventilation parameters
Parameter	ProSeal LMA				I-gel
	Neutral	Flexion	Extension	Lateral rotation	Neutral	Flexion	Extension	Lateral rotation
Delivered tidal volumes (mL)	461 ± 68.72	452 ± 100.75	457 ± 66.28	463 ± 66.26	481 ± 48.69	481 ± 52.67	477 ± 50.69	478 ± 49.63
Peak airway pressures (cm H2O)	16 ± 2.52	19 ± 6.09	15 ± 2.85	16 ± 2.59	15 ± 2.99	17 ± 5.25	15 ± 3.39	16 ± 3.24
EtCO2 (mm Hg)	31 ± 2.33	31 ± 1.98	31 ± 2.24	31 ± 2.06	31 ± 2.27	31 ± 2.02	31 ± 2.10	31 ± 2.07
LAW-PAW (cm H2O)	11 ± 5.02	12 ± 6.83	9 ± 5.18	12 ± 4.27	6 ± 4.86^*	7 ± 6.23^*	3 ± 4.46^*	6 ± 4.77^*
Ventilation score (3/2/1/0)	30/0/0/0	29/0/0/1	30/0/0/0	30/0/0/0	30/0/0/0	29/1/0/0	30/0/0/0	30/0/0/0

Data shown are mean ± SD or numbers. < 0.05 is considered significant. ^* value < 0.01.
(LAW-PAW, compared with similar positions between I-gel and ProSeal LMA.) LAW-PAW was consistently better for ProSeal LMA than I-gel in all positions. Other parameters including peak airway pressures, tidal volume delivery, and ventilation scores were comparable between the two groups in all positions.