4Elrod RE. Nursing care of the patient with medical-surgical disorders[M]. 2nd ed. New York: McGraw-Hill Co, 2001: 126-129.
5Noyes A, Haydon GM,Van Sickel M. Textbook of psychiatric nursing[M]. 5th ed. New York.. MacMillan Co, 2009: 223- 226.
6Robert L, Hanson N. Predictive criteria for length of nasogas- tric tube insertion for tube feeding: the American society for parenteral and enteral nutrition [J]. Wikipedia, 2006: 160- 163.
7Marlow DR, Sellew G. Textbook of pediafric nursing[M]. Philadelphia: WB Saunders Co, 2007: 88- 89.
8Chen YC,Wang LY,Chang YJ, et al. Potential risk of malpo- sition of nasogastric tube using nose-ear-xiphoid measure- ment[J]. PLoS ONE, 2014,9 (2) : 2.
9Creel AM, Winkler MK. Oral and nasal enteral tube place- ment errors and complications in a pediatric intensive care u- nit[J]. Pediatr Crit Care Med,2007,8(2) :161-164.
10Proehl JA, Heaton K, Naccarato MK, et al. Emergency nurs- ing resouree:gastric tube placement verifieation[J].J Emerg Nurs, 2011,37(4) : 357-362.