Footnotes

• Contributors DT wrote the first draft of the manuscript, revised and approved the manuscript as submitted. ND, GG, DN, MM, MP participated in the care of the patients, drafting or revising of the manuscript, and have approved the manuscript as submitted.

• Funding None.

• Competing interests DT, ND, MM and MP are involved in teaching for courses supported by an educational grant from The Laryngeal Mask Company Limited, UK.

• Patient consent Obtained.

• Provenance and peer review Not commissioned; externally peer reviewed.