Maitra S, Baidya DK, Arora MK, Bhattacharjee S, Khanna P. J Clin Anesth. 2016 Sep;33:298-305
Meta-analysis of 10 RCTs to assess results when comparing the oropharyngeal leak pressure of each device. LMA ProSeal returned more favourable results, although i-gel deemed easier to insert. ProSeal also reported higher blood staining.
Link to abstract.
Maitra S, Baidya DK, Bhattacharjee S, Khanna P. Paediatr Anaesth. 2014 Oct;24(10):1072-9
A total of nine studies were included using search keywords, with results finding that i-gel gave significantly higher leak pressure and ProSeal. Authors conclude it is an effective alternative to ProSeal and cLMA.
Link to abstract