Withdrawal of treatment after devastating brain injury: post‐cardiac arrest pathways lead in best practice

non nocere—Above All, Do No Harm! Journal of Clinical Pharmacology 2005; 45: 371–7. 20. Grocott HP. Difficult airway research options and ethical consensus. Anaesthesia 2017; 72: 541–2. 21. Cook TM, Woodall N, Harper J, Benger J. Major complications of airway management in the UK: results of the 4th National Audit Project of the Royal College of Anaesthetists and the Difficult Airway Society. Part 2 intensive care and emergency department. British Journal of Anaesthesia 2011; 106: 632–42. 22. Aziz MF, Healy D, Kheterpal S, Fu RF, Dillman D, Brambrink AM. Routine clinical practice effectiveness of the Glidescope in difficult airway management: an analysis of 2,004 Glidescope intubations, complications, and failures from two institutions. Anesthesiology 2011; 114: 34–41. 23. Kristensen MS. Identifying and evaluating predictors of a difficult airway: the importance of not excluding the really interesting patients. Anesthesia and Analgesia 2005; 101: 928. 24. Wendler D. The Ethics of Clinical Research in the Stanford Encyclopedia of Philosophy 2017. Editor Zalta EN. 2017. https://plato.stanford. edu/arc hives/spr2017/entries/clinical-research/ (accessed 17/04/2017). 25. World Medical Association. World Medical Association Declaration of Helsinki: Ethical principles for medical research involving human subjects. 2013. https://www.wma. net/policies-post/ wma-declaration-of-helsinki-ethical-pri nciples-for-medical-research-involvinghuman-subjects/ (accessed 17/04/ 2017). 26. Mihai R, Blair E, Kay H, Cook TM. A quantitative review and meta-analysis of performance of non-standard laryngoscopes and rigid fibreoptic intubation aids. Anaesthesia 2008; 63: 745– 60. 27. Lewis SR, Butler AR, Parker J, Cook TM, Smith AF. Videolaryngoscopy versus direct laryngoscopy for adult patients requiring tracheal intubation. Cochrane Database of Systematic Reviews 2016; 11: CD011136. 28. Harris T, Ellis DY, Foster L, Lockey D. Cricoid pressure and laryngeal manipulation in 402 pre-hospital emergency anaesthetics: essential safety measure or a hindrance to rapid safe intubation. Resuscitation 2010; 81: 810–6. 29. Sakles JC, Laurin EG, Rantapaa AA, Panacek EA. Airway management in the emergency department: a oneyear study of 610 tracheal intubations. Annals of Emergency Medicine 1998; 31: 325–32. 30. Nolan JP, Kelly FE. Airway challenges in critical care. Anaesthesia 2011; 66: 81–92. 31. Cook TM, Kelly FE. Time to abandon the ‘vintage’ laryngeal mask airway and adopt second-generation supraglottic airway devices as first choice. British Journal of Anaesthesia 2015; 115: 497–9. 32. Frerk C, Mitchell VS, McNarry AF, et al. Difficult Airway Society 2015 guidelines for management of unanticipated difficult intubation in adults. British Journal of Anaesthesia 2015; 115: 827–48. 33. Law JA, Broemling N, Cooper RM, et al. The difficult airway with recommendations for management–part 1–difficult tracheal intubation encountered in an unconscious/induced patient. Canadian Journal of Anesthesia 2013; 60: 1089– 118. 34. Cook TM, Morgan PJ, Hersch PE. Equal and opposite expert opinion. Airway obstruction of a retrosternal thyroid mass: management and prospective international expert opinion. Anaesthesia 2011; 66: 828–36. 35. Behringer EC, Kristensen MS. Evidence for benefit vs novelty in new intubation equipment. Anaesthesia 2011; 66 (Suppl. 2): 57–64.