Uppal V, Fletcher G, Kinsella J. Br J Anaesth 2009; 102(2): 264-8
In this study, published in the BJA, twenty-five patients were given a standard anaesthetic, followed by insertion of an i-gel. The lungs were ventilated at three different pressures and the difference between the inspired and expired tidal volumes used to calculate the leak volume and leak fraction. The i-gel was then removed and replaced with a conventional tracheal tube, for which similar readings were taken. The results were then compared. From the data taken, the authors concluded that, ‘compared with a tracheal tube there is no significant difference in the gas leak when using an i-gel during PCV with moderate airway pressures’.
Link to abstract.