Volume: 5   Issue: 8

Ajay Kumar Pajiyar, Amit Kumar Karna, Haiyun Wang , Lin Ma, Lumin Miao, Guolin Wang
Canadian Journal of Discovery, 5(8), 1-10
doi: https://doi.org/10.5281/zenodo.13275434
Abstract: Background: The Guardian Laryngeal Mask Airway (G-LMA) is a new extra glottic device, silicone- based, single-use, with a cuff pilot valve with pressure indicator and an integrated gastric drainage port. We aimed to compare the clinical performance of this laryngeal mask airway with the Supreme Laryngeal Mask Airway (S-LMA) in paralyzed, anesthetized adult patients. Material and methods: In this prospective, randomized study, we recruited 80 adult patients scheduled for an elective surgical procedure under total intravenous anaesthesia in a supine position. The patients were randomly distributed into two groups, with 40 patients in each group - Group G and Group S, where G-LMA and S-LMA were used respectively. The cuff of each device was inflated with air to 60 cmH2O. The primary aim of this study was to compare the airway sealing pressure of S-LMA and G-LMA. The secondary aim was to compare the efficacy and safety of these two laryngeal mask airway devices in terms of successful insertion, insertion time, successful insertion of a gastric tube, gastric tube insertion time, volume of air for cuff inflation to 60 cmH2O, intracuff pressure measurement, fiber-optic position of airway assessment, and postoperative pharyngolaryngeal adverse events.Results:At 60 cmH2O intracuff pressure, the airway sealing pressure of G-LMA was higher than S-LMA (p=0.003). The volume of air for cuff inflation was less in G-LMA than S-LMA (p=0.03). We found no differences in both groups with respect to the first successful insertion attempt (p=1.000), device insertion time (p=0.530), first successful insertion attempt for gastric tube placement (p=1.000), gastric tube insertion time (p=0.111), fiber-optic position of airway devices (p=0.437), intracuff pressure at 30, 60, 90, and 120 minutes (p=0.272, 0.327, 0.589, 0.469), blood staining (p=0.578). The postoperative pharyngolaryngeal adverse events at 1, 2, and 24 hours after the end of surgery were comparable. Conclusion: The Guardian laryngeal mask airway provides better airway sealing pressure at 60 cmH2O cuff pressure during controlled ventilation than the Supreme laryngeal mask airway.