Respiratory failure & ventilation
High-flow nasal cannula versus noninvasive ventilation in stabilized hypercapnic exacerbation: a physiological crossover trial
Authors' conclusion
In stabilized hypercapnic exacerbation, HFNC and NIV reduced tcCO₂, but only HFNC lowered ventilatory ratio and minute ventilation. HFNC at 50 L.min-1 reduced diaphragm activity and was non-inferior to NIV in this regard, while being preferred by patients.
Study context
- Population
- Patients with stabilized hypercapnic exacerbation requiring non-invasive ventilation (NIV) or high-flow nasal cannula (HFNC)TFdi available in 17
- Participants
- 21 patients
- Comparison
- HFNC at 50 or 30 L.min-1 vs NIV
- Primary endpoint
- Non-inferiority of HFNC 50 L.min-1 vs NIV in reducing diaphragm thickening fraction (TFdi)
Methodological detailsnon-inferiority, physiological
- Non-inferiority
- Physiological
Primary result
As reported in the abstract
Reduction in TFdi
- HFNC 50 L.min-1 vs NIV: 95% CI −19.1-3.4; P = 0.122
- HFNC 30 L.min-1 vs NIV: 95% CI −17.0-5.7; P = 0.413
- Non-inferiority
- 17 patients with TFdi available
Further findings
| Outcome | HFNC 50 L.min-1 | P value |
|---|---|---|
| Change in TFdi vs baseline | 18% (SD 36%) | |
| Minute ventilation and estimated ventilatory ratioHFNC vs NIV · lower with HFNC | P < 0.01 |
TFdi•RR and respiratory rate vs baseline
- Only HFNC 50 L.min-1 reduced TFdi•RR vs baseline
- P = 0.036
- Only HFNC 50 L.min-1 reduced respiratory rate vs baseline
- P = 0.001
Change in TFdi vs baseline
- HFNC 50 L.min-1 decreased baseline TFdi (p = 0.033); NIV did not decrease it
tcCO2
- HFNC and NIV reduced tcCO₂ vs baseline
Patient preference
- HFNC was the preferred strategy by patients
Original publication
High-flow nasal cannula versus noninvasive ventilation in stabilized hypercapnic exacerbation: a physiological crossover trial. Ann Intensive Care. Published 19 May 2026. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →