• 1. The First Clinical Medical College of Lanzhou University, Lanzhou, 730000, P.R.China;
  • 2. Department of Nursing, The First Hospital of Lanzhou University, Lanzhou, 730000, P.R.China;
  • 3. School of Nursing, Lanzhou University, Lanzhou, 730000, P.R.China;
  • 4. Evidence-Based Medicine Center, Lanzhou University, Lanzhou, 730000, P.R.China;
  • 5. Department of Intensive Care Unit, The First Hospital of Lanzhou University, Lanzhou, 730000, P.R.China;
ZHANG Zhigang, Email: zzg3444@163.com
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Objective  To systematically review the efficacy of noninvasive positive pressure ventilation (NPPV) by helmet in adults with acute respiratory failure. Methods  Randomized controlled trials (RCTs) or cohort studies about noninvasive positive pressure ventilation (NPPV) by helmet in adults with acute respiratory failure were retrieved in PubMed, The Cochrane Library (Issue 11, 2016), Web of Science, EMbase, CBM, CNKI and WanFang Data databases from inception to November 2016. Two reviewers independently screened literature, extracted data and assessed the risk of bias of included studies. Stata 12.0 software was then used to perform meta-analysis. Results  A total of eight studies were included. The results of meta-analysis showed that, NPPV by helmet could significantly reduce the carbon dioxide partial pressure (cohort study: SMD=–0.46, 95%CI –0.75 to –0.18, P=0.001), tracheal intubation rate (RCT: OR=0.36, 95%CI 0.17 to 0.77, P=0.008) and hospital mortality (RCT: OR=0.48, 95%CI 0.24 to 0.98, P=0.044), improve the positive end expiratory pressure (RCT: SMD=1.27, 95%CI 0.87 to 1.67, P<0.05) and respiratory status (RCT: SMD=–0.45, 95%CI –0.81 to –0.08,P=0.017). There was no significant difference in the duration of NPPV(cohort study: OR=–0.20, 95%CI –0.50 to 0.09, P=0.177; RCT: OR=–0.24, 95%CI –0.86 to 0.38, P=0.445). Conclusion  NPPV by helmet can reduce the carbon dioxide partial pressure, tracheal intubation rate, hospital mortality and improve the positive end expiratory pressure, respiratory status. But the effects in the duration of NPPV and oxygenation index are uncertain. Due to limited quality and quantity of the included studies, more high quality studies are needed to verify above conclusion.

Citation: HOU Yuying, ZHANG Caiyun, YUN Rongrong, TIAN Jinhui, ZHANG Zhigang, YUE Weigang, JIANG Youfei. Efficacy of noninvasive positive pressure ventilation by helmet in adults with acute respiratory failure: a meta-analysis. Chinese Journal of Evidence-Based Medicine, 2017, 17(11): 1283-1290. doi: 10.7507/1672-2531.201705018 Copy

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