a comparison between a two person insertion technique of laryngeal mask airway and the classic one person technique

background: various studies are seeking to find new methods to improve techniques of laryngeal mask airway (lma) insertion and reduce possible complications. in this study, we embarked on a clinical study to investigate the advantages of a new insertion method of laryngeal mask and to compare it with the classic method. materials and methods: two hundred patients aged 20-60 years old in 2012 were randomly divided into two groups allocated to receive either the new technique of insertion of lma (two-person method) or the classic method (one-person method). in the two person method, jaw thrust and mouth opening is done by a technician and then anesthesiologist inserts the lma. oxygen saturation, time to insert laryngeal mask, end-tidal carbon dioxide pressure, and the ease of insertion in both groups were measured. the collected data were analyzed by using anova test. p-value< 0.05 was considered as statistically significant. results: the measured end-tidal pressure of carbon dioxide (etco 2 ) and saturation of o 2 were 31.68 mmhg and 98.87 % in the classic method and 30.47 mmhg and 99.42 % in the two-person method, respectively. these differences were statistically significant for both values. however, the discrepancy of insertion time and ease of insertion between the two groups were not statistically considerable. conclusion: the new technique introduced in this study is associated with higher rate of success, as evidenced by enhancement of saturation of o 2 and reduction of etco 2 . therefore, this method could be considered as a safe and effective method in order to establish a secure airway in anesthetized patients in future studies.