From November , 2006 to October , 2012 in the Zhuji People 's Hospital , 76 children with upper respiratory tract infection approved by hospital ethic committee were randomly divided into 2 groups : group I ( n = 36 ) , children were applied with endotracheal intubation during general anesthesia ( TT group ) , while groupII ( n = 40 ) , laryngeal mask airway were used ( LMA group ) .