RESULTS	When the air volume required to obtain an intracuff pressure of 60 cm H ( 2 ) O , adequate lung ventilation was obtained in 50 patients with the PLMA , but only 28 patients with the SLMA , and the inflation volume and sequential airway seal pressure were higher with the PLMA than with the SLMA ( both P < 0.05 ) , and the airway seal pressure with the PLMA was not less than with the SLMA in each patient .\