2Suzukawa M,Usuda Y,Numata K.The effects of sputum characc- teristics on ambining an unheated humiddifier with a heat and moisture exchanging filter[J].Respir Care, 1989,34(7):976-984.
3Heftnet J E,Hess D.Tyachecetomy numagement in the chronically ventilated patient[J].Clin chest Med,2001,22(1 ):55-69.
10Kallstrom T. AARC Clinical Practice Guideline: Oxygen Therapy for Aduhs in the Acute Care Facility-2002 Revi- sion & Update[ J ]. Respiratory Care, 2002, 47(6):717-720.
