Table
1: Studies about the
incidence of Difficult Tracheal Intubation (DTI)
Study |
No. of patients |
Subjects |
Diagnostic criteria for DTI |
Type of Laryngoscope Blade |
No. of Patients with Difficult intubation |
Incidence of DTI (%) |
Keith Rose et al.
1994 [28] |
18.205 |
General
population |
Cormack and
Lehane grade III or IV or 2 or more attempts |
Macintosh |
326 |
1.8 |
Keith Rose et al.
1996 [29] |
3.325 |
General
population |
Cormack and
Lehane grade III or IV |
Macintosh |
336 |
10.1 |
Keith Rose et al.
1996 [29] |
3.325 |
General population |
Three or more attempts |
Macintosh |
63 |
1.9 |
El-Ganzouri et
al. 1996 [7] |
10.507 |
General
population |
Cormack and
Lehane grade III or IV |
Macintosh and
Miller |
642 |
6.1 |
Arné et al, 1998
[20] |
1.200 |
Surgery for ENT
and general population |
Unusualtechniquesperformed
by twoAnesthesiologists |
Macintosh |
50 |
4.2 |
Adnet et al. 2001
[30] |
1.171 |
General
population |
IDS more than 5 |
Macintosh |
94 |
8 |
Iohom et al. 2002
[31] |
212 |
General
population |
Cormack and
Lehane grade III or IV |
Macintosh |
20 |
9 |
Gupta et al. 2003
[32] |
372 |
Obstetric
population |
Cormack and
Lehane grade III or IV |
Macintosh |
25 |
6.7 |
Ezri et al. 2003
[33] |
1.472 |
Morbidly obese
and non-obese |
Cormack and
Lehane grade III or IV |
Macintosh |
152 |
10.3 |
Combes et al.
2004 [34] |
11.257 |
General
population |
More than two
attempts |
Macintosh |
100 |
0.9 |
Cattano et al.
2004 [35] |
1.956 |
General
population |
Cormack and
Lehane grade III or IV or 3 or more attempts |
Macintosh |
28 |
1.4 |
Connelly et al.
2006 [11] |
168.000 |
General
population |
Anesthesiologist
discretion |
Macintosh |
446 |
0.26 |
Yildiz et al. 2007
[22] |
1.674 |
General
population |
Cormack and
Lehane grade III or IV |
Macintosh |
80 |
4.8 |
Tse et al. 2007 [36] |
471 |
General
population |
Cormack and
Lehane grade III or IV |
Macintosh |
61 |
13 |
Aftab et al. 2008
[37] |
150 |
General
population |
No. of attempts+
Cormack and Lehane grade. Score more than 4 |
Macintosh |
4 |
2.6 |
McDonnell et al.
2008 [38] |
1.095 |
Obstetric
population |
More than one
attempt |
Macintosh |
36 |
3.3 |
L’Hermite et al.
2009 [39] |
1.024 |
General
population |
IDS more than 5 |
Macintosh |
61 |
6 |
Kalezić et
al. 2009 [40] |
2.000 |
Tyroid surgery |
Cormack and
Lehane grade III or IV |
Macintosh |
110 |
5.5 |
Tao et al. 2012 [41] |
2.158 |
Obstetric
population |
More than 3
attempts and/or additional techniques |
Obstetric
population |
12 |
0.56 |