We describe a new laryngeal mask airway (LMA) that incorporates a second tu
be placed lateral to the airway tube and ending at the tip of the mask. The
second tube is intended to separate the alimentary and respiratory tracts.
It should permit access to or escape of fluids from the stomach and reduce
the risks of gastric insufflation and pulmonary aspiration. It can also de
termine the correct positioning of the mask. A second posterior cuff is fit
ted to improve the seal. A preliminary crossover comparison with the standa
rd mask in 30 adult female patients showed no differences in insertion, tra
uma or quality of airway. At 60 cm H2O intracuff pressure, the new LMA gave
twice the seal pressure of the standard device (P<0.0001) and permitted bl
ind insertion of a gastric tube in all cases. It is concluded that the new
device merits further study.