📈 Pulse Pressure Variation (PPV)
UseWhen to use: controlled ventilation meeting PPV applicability criteria.
StrataPPV >≈13% suggests likely responders when applicability is met; 9–13% is a gray zone.
LimitsWhen not to use: AF, spontaneous breathing, low VT, open chest, sever… · Pitfall: ignoring applicability. · Not a sole fluid prescription.
SourceStandard PPV teaching formula
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
(PPmax−PPmin)/PPmean×100%.
When to use
When to use: controlled ventilation meeting PPV applicability criteria.
How it works
PPV = (PPmax − PPmin) / PPmean × 100%.
Key points
- (PPmax−PPmin)/PPmean×100%.
- Dynamic index.
- Next: PLR / SVV.
References
- Standard PPV teaching formula
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.
| PPmax | 48 mmHg |
|---|---|
| PPmin | 36 mmHg |
→PPV28.6%
- PPmean：42.0 mmHg
- ΔPP：12.0 mmHg
- Cue：>≈13% — higher PPV band (fluid-responsiveness cue if applicability met)
Verification & sources · governance
FAQ
Frequently asked questions
- Does Pulse Pressure Variation (PPV) 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 Pulse Pressure Variation (PPV) calculated in practice? Can you show a worked example?
- Inputs: PPmax 48 mmHg, PPmin 36 mmHg → Result: PPV 28.6 %（PPmean: 42.0 mmHg, ΔPP: 12.0 mmHg, Cue: >≈13% — higher PPV band (fluid-responsiveness cue if applicability met)）