Weil G, Matysiak J, Guye ML, Eghiaian A, Bourgain JL. Ann Fr Anesth Reanim. 2014 Sep-Oct;33(9-10):508-13
Using LMA Unique as a reference, cost efficacy comparisons were made against i-gel, Ambu AuraOnce and LMA Supreme. Conclusions suggested that latest generation devices are still expensive despite low rate of complications.
Link to abstract