Application discussion on gastrointestinal decompression and drainage combined with laryngeal mask airway

Objective To compare the effects of continuous positive-pressure ventilation on inserting standard laryn-geal mask under gastrointestinal decompression and drainage and simple inserting standard laryngeal mask, and ob-serve the influence of gastrointestinal decompression and drainage tube for laryngeal mask airway. Methods A total of20 cases underwent abdominal operation and whose duration of fasting was more than 10 hours and placed gastroin-testinal decompression and drainage before operation were selected as the experimental group,and 20 cases underwent elective abdominal operation and not placed gastrointestinal decompression and drainage before operation were select-ed as the control group, and two groups were inserted standard laryngeal mask airway(SLMA) under the laryngeal en-doscope assistance. The satisfaction of laryngeal mask airway of two groups were evaluated, the laryngeal mask inser-tion time, airway sealing pressure, tidal volume, mean peak inspiratory pressure and maximum peak inspiratory pres-sure were determined and graded by fiberoptic bronchoscope(FOB), and the stomach bubble flatulence were evaluated.Results There were no significant differences in laryngeal mask insertion time, FOB scoring, tidal volume, mean peak inspiratory pressure and maximum peak inspiratory pressure between two groups( P 0.05); The airway sealing pressure before and after the balloon inflation in the experimental group were lower than those in the control group,and the differences were significant(P 0.05 and P 0.01); The leak rate after laryngeal mask insertion in the experimental group increased significantly, improved obviously after the balloon inflation and adjustment, and the difference was not significant compared with the control group(P 0.05); The operative field satisfaction of the experimental group was better than that of the control group when abdominal exploration, but the difference was not significant. Conclusion On the premise of full fasting and condition of determining preoperative free and effective gastrointestinal drainage, laryn-geal mask airway may still be as one of the chosen for effective ventilation.