6American Association for Respiratory Care. AARC Clinical Practice Guidelines.Endotraeheal suctioning of mechanically ventilated patients with artificial airways 2010 [ J ]. Respiratory care ,2010,55(6) :758.
7Pedersena CM, Rosendahl nielsenb M, Hjermindc J, et al. En- dotracheal suctioning of the adult intubated patient what is the evidence [ J ]. Intensive Crit Care Nurs, 2009,25 ( 1 ) : 21 -30.