Reducing Work of Breathing in High-Frequency Ventilation
Author Information
Author(s): Marc van Heerde, Karel Roubik, Vitek Kopelent, Frans B. Plötz, Dick G. Markhorst
Primary Institution: VU University Medical Center, Amsterdam, The Netherlands
Hypothesis
Can a demand-flow system reduce the imposed work of breathing during high-frequency oscillatory ventilation?
Conclusion
The demand-flow system significantly reduces imposed work of breathing and fluctuations in airway pressure during high-frequency oscillatory ventilation.
Supporting Evidence
- The demand-flow system reduced inspiratory imposed work of breathing by 30% to 56%.
- Inspiratory imposed pressure time product decreased by 38% to 59% with the demand-flow system.
- Expiratory imposed work of breathing was reduced by 12% to 49% compared to continuous fresh gas flow.
Takeaway
A new system helps patients breathe easier while on a special ventilator by making it less hard for them to breathe.
Methodology
A bench test was conducted using a demand-flow system to simulate spontaneous breathing and measure work of breathing.
Limitations
The bench test model cannot fully simulate patient-ventilator interaction, and the effectiveness needs to be tested in real patients.
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website