Respiratory failure & ventilation
Influence of different noninvasive oxygenation support devices on tidal volume
Authors' conclusion
Tidal volume is significantly influenced by noninvasive oxygenation support devices, with a strong correlation with the pressure variation generated into the mouth during inspiration. NIV was associated with the highest tidal volumes and CPAP with the lowest ones.
Study context
- Population
- Manikin connected to a lung simulator (normal, obstructive, restrictive mechanics; low, moderate, respiratory distress efforts) and healthy volunteers
- Comparison
- HFNC, continuous positive airway pressure (CPAP), mask noninvasive ventilation (Mask-NIV), helmet NIV (Helmet-NIV) vs oxygen mask (O2-mask)
- Outcome
- Tidal volume
Methodological detailsmanikin with lung simulator, electrical impedance tomography in volunteers
- Manikin with lung simulator
- Electrical impedance tomography in volunteers
Main finding
As reported in the abstract
Tidal volume (bench model)
Further findings
| Outcome | Values |
|---|---|
| Mouth pressure-time product during inspiration (PTPmouth, bench) | HFNC - 0.3 (interval - 0.8 to - 0.2) cmH2O.sec/cycle · CPAP - 0.7 (interval - 2.2 to - 0.5) cmH2O.sec/cycle · Helmet-NIV 4.5 (interval 4.1–4.6) cmH2O.sec/cycle · Mask-NIV 6.1 (interval 5.9–7.1) cmH2O.sec/cycle |
| Tidal volume by EIT (healthy volunteers) | O2-mask 644 (interval 571–764) mL · CPAP 648 (interval 586–770) mL · HFNC 819 (interval 609–918) mL · Mask-NIV 1110 (interval 661–1305) mL · Helmet-NIV 1086 (interval 833–1243) mL |
Mouth pressure-time product during inspiration (PTPmouth, bench)
- Tidal volume strongly correlated with each device's effect on mouth pressure during inspiration
Tidal volume by electrical impedance tomography (EIT) (healthy volunteers)
- Similar between O2-mask and CPAP; higher with HFNC, Mask-NIV and Helmet-NIV
Original publication
Influence of different noninvasive oxygenation support devices on tidal volume. Ann Intensive Care. Published 25 November 2023. doi:10.
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