Arandomized clinical trial of neurally adjusted ventilatory assist versus conventional weaning mode in patients with COPD and prolonged mechanical ventilation

Nai Ying Kuo, Mei Lien Tu, Tsai Yi Hung, Shih Feng Liu*, Yu Hsiu Chung, Meng Chih Lin, Chao Chien Wu

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

26 Scopus citations

Abstract

Background: Patient-ventilator asynchrony is a common problem in mechanically ventilated patients; the problem is especially obvious in COPD. Neutrally adjusted ventilatory assist (NAVA) can improve patient-ventilator asynchrony; however, the effect in COPD patients with prolonged mechanical ventilation is still unknown. The goals of this study are to evaluate the effect of NAVA and conventional weaning mode in patients with COPD during prolonged mechanical ventilation. Methods: The study enrolled a total of 33 COPD patients with ventilator dependency for more than 21 days in the weaning center. A diaphragm electrical activity (Edi) catheter was inserted in patients within 24 hours after admission to the respiratory care center, and patients were randomly allocated to NAVA or conventional group. A spontaneous breathing trial was performed every 24 hours. The results correlated with the clinical parameters. Results: There were significantly higher asynchrony incidence rates in the whole group after using Edi catheter (before vs post-Edi catheter insertion =60.6% vs 87.9%, P,0.001). Asynchrony index: before vs post-Edi catheter insertion =7.4%±8.5% vs 13.2%±13.5%, P,0.01. Asynchrony incidence: NAVA vs conventional =0% vs 84.2%, P,0.001. Asynchrony index: NAVA vs conventional =0 vs 11.9±11.2 (breath %), P,0.001. The most common asynchrony events were ineffective trigger and delayed trigger. Conclusion: Compared to conventional mode, NAVA mode can significantly enhance respiratory monitoring and improve patient-ventilator interaction in COPD patients with prolonged mechanical ventilation in respiratory care center.

Original languageEnglish
Pages (from-to)945-951
Number of pages7
JournalInternational Journal of COPD
Volume11
Issue number1
DOIs
StatePublished - 11 05 2016

Bibliographical note

Publisher Copyright:
© 2016 Kuo et al.

Keywords

  • Asynchrony index
  • COPD
  • Edi catheter
  • NAVA (neurally adjusted ventilatory assist)
  • Pneumatic trigger
  • Prolonged mechanical ventilation

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