A Clinical Comparison of Disposable Airway Devices

Abstract

ABSTRACTBackground: The re-usable Classic laryngeal mask airway (LMA®) is widely used. There are concerns regarding the transmission of pathogens. Disposable airway devices provide a cost-effective alternative. We performed a side by side clinical comparison of these devices applicable to the South African context.Methods: Adult ASA 1–3 patients (30–100 kg) presenting for elective peripheral surgery in Tygerberg Academic Hospital were randomised to receive the gold standard Classic LMA®, or one of four disposable devices. They all received a standardised anaesthetic with propofol, fentanyl and isoflurane in 40% O2/N2O. Insertion technique, mask sizes and maximum cuff volumes were per manufacturer's instructions. The cuff was inflated to achieve an adequate airway seal (no audible leak at an airway pressure of 20cm H2O), or to the maximum recommended volume. Cuff and airway pressures were measured continuously. A protocol was followed for repeated or failed attempts. 115 of the proposed 130 patients were r...