87-88. 3 Butler M, Hayes B, Hathaway M et al. Specific genetic diseases at risk for sedation ⁄ anesthesia complications. Anesth Analg 2000; 91: 837-855. 4 Sun D, Warriner C, Parsons D et al. The GlideScope Ò Video Laryngoscope: randomized clinical trial in 200 patients. Br J Anaesth 2005; 94: 381-384. 5 Lai H, Chen I, Chen A et al. The use of the GlideScope Ò for tracheal intubation in patients with ankylosing spondylitis. Br J Anaesth 2006; 97: 419-422.

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Spo2 decreased much later during apnea on the METI simulator than in a clinical situation, whether preoxygenation was performed or not. The debriefing after simulation of critical situations or the use of the METI simulator to test a new equipment must consider these results.

This study confirms the absolute necessity of allowing gas exhalation between 2 insufflations and maintaining low respiratory rates during transtracheal oxygenation. In the case of total airway obstruction, the ENK may be less deleterious because it has a pressure release vent. Using a Manujet at lower driving pressures may decrease the risk of barotrauma and allow the safe use of higher respiratory rates.