Randomized crossover comparison of ProSeal® Laryngeal Mask Airway with Laryngeal Tube Sonda® during anaesthesia with controlled ventilationâ€

The difference in seal pressure between devices was clinically unimportant. However, the LTS had an unexpectedly high failure rate. PLMA performance exceeded LTS performance in many clinically useful measures. The PLMA has greater clinical utility than the LTS during controlled ventilation.