Subglottic Secretion Drainage for Preventing Venti-lator Associated Pneumonia: A Meta-analysis

Rong Wang; Xiang Zhen; Bao-Yi Yang; Xue-Zhen Guo; Xue Zeng; Chun-Yan Deng

doi:10.1016/j.cnre.2015.03.001

摘要：Objective: Ventilator associated pneumonia ( VAP) has been shown to be associated with signifi-cant morbidity and mortality( Chastre and Fagon, 2002;klompas, 2007) among mechanically venti-lated patients in the intensive care unit ( ICU ) , with the incidence ranging from 9% to 27%;crude mortality ranges from 25% to 50%. 1-3 A meta-analysis of published studies was undertaken to combine information regarding the effect of subglottic secretion drainage ( SSD ) on the inci-dence of ventilated associated pneumonia in adult ICU patients. Methods: Reports of studies on SSD were identified by searching the PUBMED, EMBASE, and COCHRANCE LIBRARY databases ( December 30, 2010) . Randomized trials of SSD compared to usual care in adult mechanically ventilated ICU patients were included in this meta-analysis. Results: Ten RCTs with 2, 314 patients were identified. SSD significantly reduced the incidence of VAP [ relative risk ( RR)=0. 52, 95% confidence interval ( CI): 0. 42-0. 64, P<0. 000 01] . When SSD was compared with the control groups, the overall RR for ICU mortality was 1. 00 ( 95% CI, 0. 84-1. 19) and for hospital mortality was 0. 95 ( 95% CI, 0. 80-1. 13) . Overall, the subglottic drainage effect on the days of mechanical ventilation was -1. 52 days ( 95% CI, -2. 94 to -0. 11) and on the ICU length of stay ( LOS) was -0. 81days ( 95% CI, -2. 33 to -0. 7) . Conclusions: In this meta-analysis, when an endotracheal tube ( ETT) with SSD was compared with an ETT without SSD, there was a highly significant reduction in the VAP rate of approxi-mately 50%. Time on mechanical ventilation ( MV) and the ICU LOS may be reduced, but no re-duction in ICU or hospital mortality has been observed in published trials.