Time lag between oscillatory pressure and flow affecting accuracy of forced oscillation technique
2011
Impact of Time Lag on Forced Oscillation Technique Accuracy
publication
Author Information
Author(s): Ohishi Junichi, Kurosawa Hajime
Primary Institution: Tohoku University Graduate School of Medicine
Hypothesis
Does the time lag produced by different sensor positions affect the accuracy of the forced oscillation technique (FOT)?
Conclusion
A time lag between the oscillatory pressure and flow may affect the accuracy of the FOT, suggesting that it needs to be minimized or compensated for with signal processing.
Supporting Evidence
- Rrs was estimated to be increased and Xrs decreased with an increase in the time lag.
- At high oscillatory frequencies, Rrs and Xrs values were strikingly different due to time lag.
Takeaway
If the sensors measuring pressure and flow are not in the same place, it can cause delays that make the measurements less accurate. We need to fix this to get better results.
Methodology
The effect of time lag was studied by numerical analysis.
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website