Levitan RM, Kinkle WC. Anaesthesia 2005; 60(10): 1022- 1026
The first ever published study examined the positioning and mechanics of the i-gel® in 65 non-embalmed cadavers, with 73 endoscopies, 16 neck dissections and six neck radiographs. The mean percentage of glottic opening score for the 73 insertions was 82%. In each of the neck dissections and radiographs the bowl of the device covered the laryngeal inlet. In their summary, the authors concluded that the i-gel® was consistently positioned over the laryngeal inlet and that the unique gel-like material of the device performed as intended, conforming to the perilaryngeal anatomy.
Link to abstract.