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🫁 Oxygenation Index (OI)

UseGrade oxygenation severity incorporating ventilator support.

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SourcePALICC. Pediatr Crit Care Med 2015

Runs locally in your browser (no PHI uploaded). For licensed clinicians — not a substitute for clinical judgement.
Stored on this device for revisit reminders

This-shift next steps

After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.

Scene next step
📋resp failureOpen scene pack →
Related scores
Matching pathway
🧭pe_dxOpen pathway →
Score + version; reference only — not a substitute for care · no HIS write

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Methodology · worked example, guidelines & full notes
Clinical takeaway

Accounts for mean airway pressure, unlike the P/F ratio.

When to use

Grade oxygenation severity incorporating ventilator support.

How it works

OI = (FiO₂% × mean airway pressure) / PaO₂. PALICC: 4–8 mild, 8–16 moderate, ≥ 16 severe.

Key points

  • Accounts for mean airway pressure, unlike the P/F ratio.
  • Higher OI = worse oxygenation.
  • Oxygen saturation index (OSI) is a non-invasive analogue.

References

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.

FiO₂0.6 fraction
Mean airway pressure15 cmH₂O
PaO₂70 mmHg

→OI12.9

  • Severity：Moderate
  • Formula：OI = (FiO₂% × mean airway pressure) / PaO₂
Verification & sources · governance
FAQ

Frequently asked questions

What are the limits and cautions when using Oxygenation Index (OI)?
For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
Does Oxygenation Index (OI) 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 Oxygenation Index (OI) calculated in practice? Can you show a worked example?
Inputs: FiO₂ 0.6 fraction, Mean airway pressure 15 cmH₂O, PaO₂ 70 mmHg → Result: OI 12.9（Severity: Moderate, Formula: OI = (FiO₂% × mean airway pressure) / PaO₂）
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