💨 Airway Resistance (Raw)
UseWhen to use: constant-flow volume A/C with measurable Ppeak and Pplat.
StrataRising Raw with stable Pplat favors airway obstruction cues.
LimitsWhen not to use: decelerating flow without caveat / patient effort. · Pitfall: flow units (L/min vs L/s). · ETT size and secretions confound.
SourceStandard Raw estimate on volume ventilation
This-shift next steps
After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.
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Methodology · worked example, guidelines & full notes
(Ppeak−Pplat)/flow.
When to use
When to use: constant-flow volume A/C with measurable Ppeak and Pplat.
How it works
Raw ≈ (Ppeak − Pplat) / inspiratory flow (L/s).
Key points
- (Ppeak−Pplat)/flow.
- Obstruction vs compliance.
- Next: suction / bronchodilator review.
References
- Standard Raw estimate on volume ventilation
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Peak inspiratory pressure (Ppeak) | 28 cmH₂O |
|---|---|
| Plateau pressure (Pplat) | 20 cmH₂O |
| Inspiratory flow | 0.67 L/s |
→Raw11.9cmH₂O·s/L
- Flow used：0.67 L/s
- Ppeak−Pplat：8.0 cmH₂O
- Cue：10–20 — elevated resistance band
Verification & sources · governance
FAQ
Frequently asked questions
- Does Airway Resistance (Raw) upload patient data? Where is it calculated?
- Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
- How is Airway Resistance (Raw) calculated in practice? Can you show a worked example?
- Inputs: Peak inspiratory pressure (Ppeak) 28 cmH₂O, Plateau pressure (Pplat) 20 cmH₂O, Inspiratory flow 0.67 L/s → Result: Raw 11.9 cmH₂O·s/L（Flow used: 0.67 L/s, Ppeak−Pplat: 8.0 cmH₂O, Cue: 10–20 — elevated resistance band）