Choi JB, Kwak HJ, Lee KC, Lee SR, Lee SY, Kim JY. J Anesth. J Anesth. 2016 Jun;30(3):377-83
Randomised study comparing 41 female patients across two groups: i-gel and LMA, undergoing anaesthesia. EC50 of remifentanil concentration for i-gel insertion was significantly lower.
Link to abstract