Three cricoid compression devices. (A) The “cricoid yoke” is comprised of a moulded foam contact cushion that is applied to the cricoid cartilage, a perspex platform carrying a simple circuit, and stainless steel flexible wings. The device is gripped between the operator’s forefinger and thumb by means of the upturns at the tips of the wings. (B) A cricoid pressure measuring device that is utilized by applying a three-finger technique (as shown). (C) A cricoid pressure measuring device that utilizes a wedge and pin combination. (A) is reproduced with permission from Lawes EG: Cricoid pressure with or without the “cricoid yoke.” Br J Anaesth 1986; 58:1376–9. Oxford Journals; (B) is reproduced with permission from Ashurst N, Rout CC, Rocke DA, Gouws E: Use of a mechanical simulator for training in applying cricoid pressure. Br J Anaesth 1996; 77:468–72. Oxford Journals; (C) is reproduced with permission from Taylor RJ, Smurthwaite G, Mehmood I, Kitchen GB, Baker RD: A cricoid cartilage compression device for the accurate and reproducible application of cricoid pressure. Anaesthesia 2015; 70:18–25. Wiley Online Library.