To Evaluate the Impact of Pneumoperitoneum on Oropharyngeal Seal Pressure of Proseal™ LMA and Baska™ mask in Patients Undergoing Laparoscopic Cholecystectomy: A Randomized Controlled Trial

Abstract Background: Newer supraglottic airway devices (SGADs) are becoming more and more popular as a means of maintaining the airway during laparoscopic procedures. The present study’s aim was to compare the impact of pneumoperitoneum on the oropharyngeal seal pressure (OPSP) of Proseal™ laryngeal mask airway (PLMA) and Baska™ Mask (BM) in patients undergoing laparoscopic cholecystectomy. Methods: We enrolled 60 American Society of Anesthesiologists physical Status I and II patients and randomised to either the PLMA group or the BM group. After induction of anaesthesia using a standardised protocol, one of the SGADs was inserted. The primary outcome was the effect of pneumoperitoneum on the OPSP of the two devices. The secondary outcomes were the time required for insertion of the airway devices, OPSP, fibre-optic view of the vocal cord, ease of insertion and any laryngopharyngeal morbidity. Results: The demographic parameters were comparable between the study groups. The insertion time was 18.034 ± 7.73 and 18.7 ± 6.96 s for the PLMA group and BM group, respectively ( P = 0.7255). The OPSP in each group was not significantly impacted by pneumoperitoneum, although it remained the same throughout the procedure. Compared to the PLMA group, OPSP was higher in the BM group at all three time intervals (5 min after the insertion of the device T 1 , 10 min after pneumoperitoneum T 2 and 5 min after the revoking of pneumoperitoneum T 3 ). Conclusion: Pneumoperitoneum had no effect on OPSP in either group. Significantly higher OPSP was noted in the BM group (both before and following pneumoperitoneum) compared to the PLMA group.