A Randomized comparative study to observe the safety and efficacy of I gel and blockbuster laryngeal mask airway used in patients undergoing short surgical procedure under general anesthesia

Abstract

Background and Aims: Blockbuster laryngeal mask airway (LMA), a newer supraglottic airway device, provides a quick and reliable seal of the airway, making it useful for positive pressure ventilation. This randomized comparative study was undertaken to compare the safety and efficacy of I-gel and Blockbuster LMA used in short surgical procedures under general anesthesia. Materials and Methods: Hundred patients of either sex aged between 18 and 60 years belonging to the American Society of Anesthesiologist physical Status I and II undergoing general anesthesia were randomized into two groups of 50 patients each, using either I-gel (Group IG) or Blockbuster LMA (Group BB). After standard monitoring and induction of anesthesia, LMA was inserted according to their randomized groups and adequate ventilation was achieved. The primary objectives were grading of ease of insertion and time taken for successful insertion of device, while number of attempts for insertion, oropharyngeal seal pressure (OSP), hemodynamic changes, and adverse effects such as blood staining of device, injury of lips, tongue and teeth, postoperative hoarseness of voice and sore throat were secondary objectives. Data were analyzed using SPSS version 3.0.0.34. Results: The ease of insertion was graded as very easy in 46 patients in Group BB and 26 patients in Group IG (P < 0.001). The mean time for insertion was less with Group BB (24.30 ± 3.91 s) as compared to Group IG (29.50 ± 12.5 s) (P < 0.0001). 48 patients in Group BB while 37 patients in Group IG (P = 0.008) were required one attempt for insertion. The average OSP was 22.59 ± 1.44 cmH2O in Group BB as compared to 20.88 ± 2.22 cmH2O in Group IG (P < 0.0001). Hemodynamic changes were comparable at different time intervals. Complications such as blood stain of device and sore throat were more with I-gel. Conclusions: The Blockbuster LMA is an effective alternative to I-gel with faster, easier insertion, required a smaller number of attempts, high airway sealing pressure with stable hemodynamic, and less incidence of blood staining and postoperative sore throat.