7Jay SJ. Nosocomial infection. Med Clin North Am, 1983,67 (6):1266.
8Valles J,Artigas A,Rello J,et al.Continuous aspiration of subglottic secretions in preventing ventilator-associated pneumonia[J].Ann Intern Med,1995,122 (3):179-186.
9Kollef M H,Skubas N J,Sundt T M.A randomized clinical trial of continuus aspiration of subglottic secretions in cardiac surgery patients[J].Chest,1999,116 (5):1339 -1346.
10Smulders K,Van der Hoeven H,Weers-Pothoff I,et al.A randomized clinical trial of intermittent subglotti secretion drainage in patients receiving mechanical ventilation[J].Chest,2002,121 (3):858-862.