Tracheal Intubation via the i-gel and the Aintree Intubation Catheter in a Patient with Unexpected Difficult Intubation 1. May 2015 sam Anaesthesia, Difficult Airways (0) Hashimoto Y, Takahashi K, Saito T, Asai T, Arai T, Okuda Y. Masui. 2015 May;64(5):534-6 Report of a successful case of a 64-year-old male difficult to intubate using a Macintosh laryngoscope, intubated via an i-gel. Link to abstract