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The i-gel differs from other supraglottic airway devices, in that it has a softer, non-inflatable cuff. This study was designed to compare the performance of the i-gel and the LMA-Unique (LMA-U) when used during anaesthesia in paralysed patients.

Both devices were studied in 39 anaesthetized, paralysed patients in a randomized crossover trial. The primary outcome was airway leak pressure. Secondary outcomes included time to insertion, the number of insertion and reposition attempts, leak volumes, and leak fractions.

There was no significant difference between the airway leak pressures of the two devices [median (IQR) leak pressures 25 (22–30) vs 22 (20–28) cm H₂O for the i-gel and LMA-U, respectively; P=0.083, 95% CI of the mean difference −0.32 to 4.88 cm H₂O]. The median (IQR) insertion time for the i-gel was …