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Fig. 4 | BMC Anesthesiology

Fig. 4

From: Effects of head-elevated position on tracheal intubation using a McGrath MAC videolaryngoscope in patients with a simulated difficult airway: a prospective randomized crossover study

Fig. 4

Laryngeal view based on modified Cormack–Lehane (MCL) grades in the head-flat and head-elevated positions. E = easy laryngeal view (MCL grade of 1 or 2a); R = restricted laryngeal view (MCL grade of 2b or 3a); D = difficult laryngeal view (MCL grade of 3b or 4); Blue lines = improved laryngeal view in the head-elevated position; green lines = no difference in laryngeal view between positions

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BMC Anesthesiology

ISSN: 1471-2253

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