Multicentre validation of manufacturers’ weight-based recommendations for laryngeal mask airway size choice in anaesthetic practice: A retrospective analysis of 20 893 cases

BACKGROUND: Manufacturers’ weight-based recommendations for laryngeal mask airway (LMA) sizes are not scientifically founded and have never been validated clinically. OBJECTIVE: The validation of manufacturers’ weight-based recommendations in clinical practice and whether other patient variables such as sex and age may influence LMA size choice. DESIGN: A retrospective study. SETTING: Four Israeli hospitals (two tertiary and two secondary hospitals). METHODS: Data on LMA use were retrieved from the Anaesthesia Information Management System (AIMS). Multinomial logistic regression analysis including weight, sex and age amongst adults, adolescents and children was used to identify predictors of LMA size used (development data set). Concordance between the size of LMA used and that predicted according to the model and the manufacturers’ recommendations was assessed (validation data set). RESULTS: LMA insertions were analysed in 13 743 (65.8%) adults, 1807 (8.6%) adolescents and 5343 (25.6%) children. Suitability of manufacturers’ recommendations was higher in children [4075/5343 (76.3%)] than adults [5200/13743 (37.8%)] or adolescents [885/1807 (49.0%); P 
Source: European Journal of Anaesthesiology - Category: Anesthesiology Tags: Airway management Source Type: research