Integrative Weaning Index (IWI)
Integrative weaning index (Nemer 2009) = static compliance x SaO2 / RSBI; an IWI >= 25 predicts weaning success from mechanical ventilation.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Static compliance
- 55 mL/cmH2O
- SaO2
- 97 %
- RSBI / f/VT
- 55 breaths/min/L
Result: Integrative weaning index 97 — favors weaning success (>= 25).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- >= 25
- Favors weaning success.
- < 25
- Below the weaning-success threshold (static compliance x SaO2 / RSBI; thresholds vary). A weaning predictor, not a diagnosis.
What you enter
- Static compliance
- SaO2
- RSBI / f/VT
How this is calculated
Nemer SN, Barbas CSV, Caldeira JB, et al. A new integrative weaning index of discontinuation from mechanical ventilation. Crit Care. 2009;13(5):R152. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.