Comparsion of efficiency between flexible laryngeal mask airway and supreme laryngeal mask airway in patients undergoing nasal endoscopic surgery

Objective To observe the Efficacy of flexible laryngeal mask airway(FLMA) and supreme laryngeal mask airway (SLMA) in nasal endoscopic surgery.Methods 40 patients aged 20-70 and ASA Ⅰ-H,the patients are randomly divided into two groups,FLMA group (F group) and SLMA group (S group).The rate of LMA successful placement,LMA placement time,fiberoptic bronchoscope grade,airway sealing pressure,airway pressure,air leakage during operation,complication,the length of anesthesia time,duration of surgery,extubation time,emergence time and the satisfication of surgeons was recorded.Results The successful placement at first time was 95％ 、90％ respectively.The time of placement in S group was shorter than that in F group [(6.3±1.3) s vs (10.2±1.8) s,P＜0.05].The differences of fiberoptic bronchoscope grade,airway sealing pressure,airway pressure,air leakage during operation,complication between two groups have no statistical significance (P＞0.05).There was no statistical significance between two groups in surgeon's satisfaction.Conclusions Both FLMA and SLMA were safe for nasal endoscopic surgery,and the placement of SLMA was much easier.FLMA may be a better choice in nasal endoscopic surgery without frontal sinus. Key words: Nasal endoscopic surgery;  Flexible laryngeal mask airway;  Supreme laryngeal mask airway