9Choong K, Chatrkaw P, Frndova HM, et al. Comparison of loss in lung volume with open Versus in - line catheter endotracheal suctioning[J ]. Pediatric Crit CareMed, 2003,4 ( 1 ) : 69 - 73.
10Deppe SA,Kelly JW,Thoi LL,et al.Incidence of colonization,nosocomial pneumonia,and mortality in critically ill patients using a Trach Care closed-suction system versus an open-suction system:prospective,randomized study[J].Critical Care Medicine,1990,18(12):1 389-1 393.
