A survey of tracheal intubation difficulty in the operating room: a prospective observational study.
BACKGROUND
The purpose of this study is to describe all degrees of endotracheal intubation difficulty among patients attended by eight anesthesiologists during routine surgery over a six-month period. Airway characteristics were routinely assessed preoperatively, according to the anesthesiologists' usual practice.


METHODS
Difficult tracheal intubation was evaluated by the Intubation Difficulty Scale (IDS), a quantitative score based on seven variables. An IDS value of 0 is consistent with a procedure without difficulty, and an IDS > 5 with a procedure involving moderate to major difficulty.


RESULTS
For 1171 patients undergoing tracheal intubation, IDS was 0 in 55%, and greater than 5 in 8% of cases. External laryngeal pressure, repositioning the patient and added use of a stylet were the most frequent methods chosen to facilitate tracheal intubation.


CONCLUSIONS
There was a high incidence (37%) of minor difficulties encountered during routine surgery.
Adnet
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F
Department of Anesthesiology-SAMU 93, Avicenne University Hospital, University Paris XIII, Bobigny, France. frederic.adnet@avc.ap-hop-paris.fr
Racine
S X
SX
Borron
S W
SW
Clemessy
J L
JL
Fournier
J L
JL
Lapostolle
F
F
Cupa
M
M
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D007442:Intubation, Intratracheal; D007828:Laryngoscopy; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies