Quinn AC, Milne D, Columb M, Gorton H and Knight M. Br J Anaesth. 2013 Jan;110(1):74-80
The purpose of this UK-wide study was to further evaluate the predetermined rate that one in 250 obstetric patients suffer failed intubation whilst undergoing general anaesthesia. Due to the lack of national figures, the study used the UK Obstetric Surveillance System (UKOSS) of data collection in centres across the UK to record incidence, risk factors and any reports of failed intubations. All contacted centres responded, equalling 57 completed reports, giving a unit-based estimation of one case in every 224 patients. Univariate analyses also recorded in detail in this report.
Link to abstract.