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

作者：Avidan Alexander^*; Eden Arieh; Reider Evgeni; Weissman Charles; Levin Phillip David

来源：European Journal of Anaesthesiology, 2015, 32(6): 432-438.

DOI：10.1097/EJA.0000000000000267

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< 0.001 for children vs. adults or adolescents]. Sex influenced LMA size in adults and adolescents, but not in children. Age had no influence. Amongst adults and adolescents, LMA size was better predicted by the regression model than by manufacturers' recommendations [adults: anaesthetists/model 61.7%, 95% confidence interval (95% CI) 60.1 to 63.2, anaesthetists/manufacturer 38.4%, 95% CI 36.0 to 39.0, P< 0.001; adolescents: anaesthetists/model 68.1%, 95% CI 64.1 to 72.0, anaesthetists/manufacturer 46.9%, 95% CI 42.7 to 51.1, P< 0.001]. In children, the regression model and manufacturers' weight-based recommendations performed equally (anaesthetists/model 78.0%, 95% CI 75.9 to 80.0, anaesthetists/manufacturer 75.7%, 95% CI 73.6 to 7.8, P = 0.126).
CONCLUSION Manufacturers' weight-based recommendations for LMA size reflect clinical practice in children, but not in adults and adolescents. In these age groups, choice of LMA size is influenced by sex and weight, although with wider ranges than those recommended by manufacturers.

• 出版日期2015-6