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Table 1 Baseline patient and airway characteristics

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

 

Overall

(n = 64)

Sequence 1a

(n = 32)

Sequence 2b

(n = 32)

Age, years

52.7 ± 13.9

53.4 ± 14.9

51.9 ± 13.0

Male/female

38/26

20/12

18/14

BMI, kg/m2

24.2 ± 2.9

23.6 ± 2.8

24.8 ± 2.8

ASA I/II/III

1/52/11

1/27/4

0/25/7

Mallampati class I/II

26/38

13/19

13/19

TMD, cm

8 (7 to 9)

8 (7 to 9)

8 (7 to 9)

ID without collar, mm

40 (40 to 50)

43 (38 to 50)

40 (40 to 48)

ID with collar, mm

32 (30 to 40)

30 (30 to 40)

35 (30 to 39)

Table-ramp angle, °

17.5 ± 4.1

17.1 ± 4.2

17.8 ± 4.1

  1. Data are presented as the mean ± standard deviation, n, or median (interquartile range). aSequence 1: head-elevated position, followed by head-flat position. bSequence 2: head-flat position, followed by head-elevated position. BMI Body mass index, TMD Thyromental distance, ID Interincisor distance at maximal mouth opening
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BMC Anesthesiology

ISSN: 1471-2253

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