Feeley TW, Hamilton WK, Xavier B. et al: Sterile anesthesia breathing circuits do not prevent post operative pulmonary infection. Anesthesiology 1981; 54: 369-372
Dezfulian C, Shojania K, Collard HR, et al: Sub glottic secretion drainage for preventing ventilator associated pneumonia: a meta analysis. Am J Med 2005; 118: 11-18
Ephgrave KS, Kleiman-Wexler R, Pfaller M, et al: Effects of sucralfate vs antacids on gastric pathogens: results of a double-blind clinical trial. Arch Surg 1998; 133: 251-257
Kauer WK, Stein HJ, Bartels H, et al: Intratrache al long term pH monitoring: a new method to evaluate episodes of silent acid aspiration in pa tients after esophagectomy and gastric pull up. J Gastrointest Surg 2003; 7: 599-602