Table 2 IT and the factors affecting IT

Intubation time (sec)

26.4 ± 8.9

31.5 ± 8.3

Visibility of vocal cords

Cormack and Lehane grade median (IQR25%; IQR75%)

1(1; 1.5)

1(1; 1)

Quality of visual recognition of vocal cords: good 0, bad 100 median (IQR25%; IQR75%)

0(0;10)

0(0; 20)

Difficulty of blade insertion

Number of cases with presence of backward or forward movement (n)

6

11

Number of blade insertion: 1/2/3/4 (mean ± SD)

1

1.3 ± 0.5

Difficulty of blade insertion: easy 0, dificult 100 median (IQR25%; IQR75%)

0(0; 10)

0(0; 20)

Difficulty of tracheal tube insertion

Number of cases with changing head presentation (n)

3

2

Number of cases with external compression of larynx (n)

0

2

Number of cases with resizing the tracheal tube (n)

0

1

Difficulty of tracheal tube insertion: easy 0, dificult 100 median (IQR25%; IQR75%)

0(0; 22.5)

25(0; 40)