Efficacy of laryngeal mask airway Guardian and laryngeal mask airway Supreme in patients undergoing gynecologicai surgery

Objective To compare the efficacy of laryngeal mask airway Guardian （GLMA） and laryngeal mask airway Supreme （SLMA） in patients undergoing gynecological surgery. Methods One hundred and twenty ASA Ⅰ or Ⅱ patients aged 19-80 yr weighing 50-70 kg undergoing gynecological surgery were randomly divided into 2 groups： SLMA group （group S, n = 59） and GLMA group （group G, n =61）. LMA was inserted after induction of anesthesia with propofol 2.0-2.5 mg/kg, sufentanil 0.2 μg/kg and rocuronium 0.6 mg/kg. All the patients were mechanically ventilated. BP, HR, SpO2, PETCO2 and Ppeak were monitored during operation. The rate of successful placement, placement time, fiberoptic bronchoscope grade, airway sealing pressure, airway pressure during normal ventilation with tidal volume of 8 ml/kg, airway pressure and air leakage during ventilation with large tidal volume of 20 ml/kg, air leakage during opertion, complications, anesthesia time, duration of surgery, extubation time and emergence time were recorded. Results There was no significant difference in the rate of successful placement, placement time, airway pressure during normal ventilation and during ventilation with large tidal volume, blood stain at LMA removal, incidence of sore throat, choking hoarseness and dysphagia, anesthesia time, duration of surgery, extubation time, and emergence time between the two groups （P 〈 0.05）. The BP,HR, SpO2, Ppeak and PETCO2 were within the normal range during operation in both groups. The fiberoptic bronchoscope grade and airway sealing pressure were significantly higher, and the incidence of air leakage during ventilation with large tidal volume and during operation was significantly lower in group G than in group S （P 〈 0.01）.Conclusion GLMA and SLMA can provide adequate ventilation during operation with fewer complications and can be used effectively for gynecological surgery. The efficacy of GLMA is better.\r\n\r\nKey words: \r\nLaryngeal mask; Respiration,artificial