8Aarc Clinical Practice Guidelines. Endotracheal suctioning of mechanically ventilated patients with artificial airways 2010[J]. Respiratory Care,2010, 55(6) :758 - 765.
9Edmunds LH, Clark RE, Cohn LH, et al. Guidelines for morbidity and mortality after cardiac valvular operation. J Thorac Cardiovasc Surg, 1996,112:708-711.
10Jenkins CD,Stanton BA,Jono RT.Quality and predicting recovery after heart surgery[].Psychosomatic Medicine.1994