2 .景继勇,兰美娟,曾妃,等.综合胸部物理治疗对呼吸机相关性肺炎的预防作用.中华护理杂志,2004,39.Evidence‐basedclinicalpracticeguidelinefo Pneumonia .Ann Intern Med . 2004,141:305‐313.Survey Crit Care Med,2000,28:3547‐3554.Thepreventionofventilationassoci pneumonia .Thenew England Jouvnalofmedicin ......