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📡 IVC Collapsibility Index

UseWhen to use: spontaneous-breathing volume assessment with adequate IVC views.

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StrataHigh collapsibility with a small IVC is a classic responsiveness cue — confirm with PLR when unsure.

LimitsWhen not to use: poor windows / high IAP / severe RV failure. · Pitfall: applying SB thresholds on controlled PPV. · Not a fluid order alone.

SourceBedside IVC collapsibility teaching index

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.

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Methodology · worked example, guidelines & full notes
Clinical takeaway

(Dmax−Dmin)/Dmax×100%.

When to use

When to use: spontaneous-breathing volume assessment with adequate IVC views.

How it works

IVC-CI = (Dmax − Dmin) / Dmax × 100%.

Key points

  • (Dmax−Dmin)/Dmax×100%.
  • US dynamic adjunct.
  • Next: PLR / PPV.

References

  • Bedside IVC collapsibility teaching index

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.

IVC Dmax (inspiratory or max)20 mm
IVC Dmin (expiratory or min)12 mm
Breathing contextSpontaneous breathing

→IVC-CI40%

  • ΔD / Dmax：8.0 / 20.0 mm
  • Dmax：20.0 mm
  • Cue：Lower collapsibility — less supportive of volume responsiveness alone
Verification & sources · governance
FAQ

Frequently asked questions

Does IVC Collapsibility Index 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 IVC Collapsibility Index calculated in practice? Can you show a worked example?
Inputs: IVC Dmax (inspiratory or max) 20 mm, IVC Dmin (expiratory or min) 12 mm, Breathing context Spontaneous breathing → Result: IVC-CI 40 %（ΔD / Dmax: 8.0 / 20.0 mm, Dmax: 20.0 mm, Cue: Lower collapsibility — less supportive of volume responsiveness alone）
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