An LMA is an FDA-approved, commercially-available device that is commonly used to substitute for an endotracheal tube.(1) The device consists of a tube, similar to an endotracheal tube, which has an inflatable donut-shaped cap at one end. The cap end of the LMA is placed through the mouth so that it lies over the larynx and the cap is then inflated. The opening of the tube is then proximal to the opening of the larynx and is sealed off from other structures that open into the pharynx (e.g., the esophagus). The other end of the LMA can then be attached to a resuscitation bag or mechanical ventilator to provide lung inflation.