Sen I, Bhardwaj N, Latha Y. J Anaesthesiol Clin Pharmacol. 2014 Oct;30(4):572-3
Use of NPA to aid removal of i-gel was evaluated in 20 adult patients - in 17 the device was inserted at the first attempt. No complications such as gagging and laryngospasm were noted during insertion or removal of i-gel.
Link to abstract