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Table 1 Glottic view according to the Cormack & Lehane in a normal airway.

From: Comparison of the McGrath® Series 5 and GlideScope® Ranger with the Macintosh laryngoscope by paramedics

Trial

Macintosh

McGrath®

GlideScope®

1

2 (1-2 [1-2])

1 (1-2 [1-2])

1 (1-2 [1-3])

2

2 (1.75-2 [1-3])

1 (1-1.25 [1-3])

1 (1-2 [1-2])

3

2 (1-2 [1-2])

1 (1-1 [1-2])

1 (1-2 [1-2])

4

2 (1-2 [1-2])

1 (1-1 [1-2])

1 (1-2 [1-2])

5

2 (1-2 [1-3])

1 (1-1.25 [1-2])

1 (1-2 [1-2])

6

2 (2-2 [1-2])

1 (1-1.25 [1-2])

1 (1-2 [1-2])

  1. Median (IQR [range]).