6Gramlich L, Kichian K, Pinilla J, et al. Does enteral nutrition compared to parenteral nutrition result in better outcomes in critically ill adult patients? A systematic review of the literature[J]. Nutrition, 2004,20:843-848.
7Cottrell DB, Asturi E. Gastric intubation: Assessment and intervention[J]. Crit Care Nuts Clin N Am,2004,16:489-493.
8Heyland DK, Dhaliwal R, Drover JW, et al. Canadian clinical practice guidelines for nutrition support in mechanically ventilated, critically ill adult patients[J]. JPEN.2003,27:355-373.
9Braunschweig CL,Levy P,Sheean PM,et al. Enteral compared with parenteral nutrition: A meta-analysis[J]. Am J Clin Nutr, 2001,74:534-542.
10Mentec H,Dupont H,Bocchetti M,et al. Upper digestive tolerance during enteral nutrition in critically ill patients: Frequency, risk factors, and complications[J]. Critare Med,2001,29(10) : 1955-1961.