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Abstract
Introduction: Use of endotracheal tube (ETT) has many limitations. There is a need for an airway device with similar safety and
good side effect profile. In this prospective observational study, the oxygenation and ventilation parameters between patients who
were inserted Proseal laryngeal mask airway (PLMA) or ETT for laparoscopic surgeries were compared.
Materials and Methods: After ethical committee approval, informed consent was obtained from sixty patients (thirty in each
group) posted for elective laparoscopic surgery. Following induction of general anaesthesia and paralysis, PLMA or ETT was
inserted and pressure control mode was used for ventilation. The following parameters were measured: a. Oxygen saturation and
changes in FiO2 needed to ensure a target SpO2> 95%, EtCO2 and changes in respiratory rate and inspiratory pressure needed to
ensure a target EtCO2 between 35-45 mmHg. b. Insertion characteristics of airway device and gastric tube, hemodynamic
responses, incidence of complications. Statistical Analysis: Chi-square test was used to analyze qualitative data. Independent t
test was used to assess quantitative variables. Repeated measures ANOVA was used to compare the outcome measures over time
adjusted for duration of surgery and anaesthesia. P values<0.05 considered significant.
Results: Both groups were comparable with respect to age, gender and weight. Oxygenation and ventilation parameters achieved
with both ETT and PLMA were comparable and satisfactory. Haemodynamic parameters increased significantly in ETT group
compared to PLMA group during airway insertion and removal. Also, postoperative sore throat was comparatively less in the
PLMA group.
Conclusion: Hence we conclude that PLMA may be considered as an alternative to ETT in airway management of patients
undergoing laparoscopic surgeries with comparable oxygenation and ventilation parameters and improved side effect profile.
Keywords: Endotracheal tube, Proseal laryngeal mask airway, Laryngoscopy, Pneumoperitoneum.