Table 4

 Factors identified by reporters as contributing to intubation difficulty from the first 4000 incidents reported to AIMS

Contributing factorNo of reports
*Cervical spine instability, facial carcinoma, congenital microsomia, ruptured trachea, and hair in a “bun” were each reported on one occasion.
Limited neck mobility17
Limited mouth opening15
Inexperience of laryngoscopist14
Inadequate assistance13
Drug errors13
Poor/prominent dentition11
Equipment deficiencies8
Laryngeal tumour8
Recent traumatic intubation8
Neck mass3
Masseter spasm2