Advantages

• Familiarity
• Possible to ventilate through
• Can act as a conduit for intubation

Disadvantages

• Not designed for positive pressure ventilation
• Intubation via the classic LMA is difficult
• The mask’s aperture bars are narrow and prevent the passage of a tube with > 6 mm internal diameter (ID) for a size 3 or 4, and
  > 7 mm ID for a size 5