Epidemiology and incidence of severe respiratory critical events in ear, nose and throat surgery in children in Europe: A prospective multicentre observational study

BACKGROUND Ear, nose and throat (ENT) surgery, the most frequently performed surgical procedure in children, is a strong predictor for peri-operative respiratory complications. However, there is no clear information about peri-operative respiratory severe critical events (SCEs) associated with anaesthesia management of ENT children in Europe. OBJECTIVE To characterise the epidemiology and incidence of respiratory SCEs during and following ENT surgery in Europe and to identify the risk factors for their occurrence. DESIGN A secondary analysis of the Anaesthesia PRactice In Children Observational Trial, a prospective observational multicentre cohort trial. SETTING The study included 261 centres across 33 European countries and took place over a consecutive 2-week recruitment period between April 2014 and January 2015. PATIENTS We extracted data from 5592 ENT surgical procedures that were performed on 5572 children aged 6.0 (3.6) years (mean (SD)) from the surgical database and compared these with data from 15 952 non-ENT surgical children aged 6.7 (4.8) years. MAIN OUTCOME MEASURES The primary outcome was the incidence of respiratory SCEs (laryngospasm, bronchospasm and new onset of postoperative stridor). Secondary outcomes were the differences in epidemiology between ENT children and non-ENT surgical children and the risk factors for the occurrence of respiratory SCEs. RESULTS The incidence (95% confidence interval) of any respiratory SCE (laryngospasm, bronchospasm and postoperative stridor) was 3.93% (3.46 to 4.48) and was significantly higher than that observed in non-ENT surgical children [2.61% (2.37 to 2.87)], with a relative risk of 1.51 (1.28 to 1.77), P less than 0.0001. Younger age (14% decrease in critical events by increasing year, P 

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