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Respiratory
HFNO reduces intubation vs conventional oxygen
High‐Flow Nasal Oxygen Versus Conventional Oxygen Therapy and Non‐Invasive Ventilation for Acute Respiratory Failure in the Emergency Department: A Systematic Review and Meta‐Analysis
Emergency Medicine Australasia · Added 15 September 2026
Systematic review and meta-analysis of 17 RCTs (1,955 patients) comparing high-flow nasal oxygen with conventional oxygen and NIV for acute respiratory failure in the ED — HFNO reduced intubation versus conventional oxygen (RR 0.61) but not versus NIV, with no clear benefit over either in COPD or acute heart failure.
- Study type
- Systematic review
- Design
- Systematic review and meta-analysis of ED RCTs
- Participants
- 17 RCTs, 1,955 adults with acute respiratory failure in the ED
- Main finding
- HFNO reduced intubation and mechanical ventilation versus COT and NIV overall (RR 0.64, 95% CI 0.47–0.88); versus COT alone RR 0.61 (0.41–0.91), but not versus NIV (RR 0.69, 0.42–1.14); benefit in undifferentiated ARF (RR 0.61, 0.41–0.93) but not COPD or acute heart failure.
- Caveat
- 10 of 17 studies had some risk-of-bias concerns and several analyses had notable heterogeneity.
- Bottom line
- Supports current practice
Why it matters in Australia (Medium relevance). transferability — ED-based and HFNO isn't carried prehospital, but it shapes expectations for the respiratory distress patients we hand over on CPAP
Learning goal
Refine my patient selection for high-flow nasal oxygen versus non-invasive ventilation in undifferentiated acute respiratory failure.
More
- Topic: Respiratory
- Daily scan: 15 September 2026
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