What RSBI threshold predicts successful extubation?

An RSBI 105 predicts failure with sensitivity ~97% and specificity ~64% in the original Yang & Tobin study. RSBI should be measured during a brief T-piece or low CPAP trial with minimal pressure support.

Can RSBI be used as the sole weaning criterion?

No. RSBI is a weaning predictor, not a standalone decision tool. Successful extubation also requires: adequate mental status to protect the airway, effective cough, manageable secretions, hemodynamic stability, and resolution of the underlying cause of respiratory failure. Most guidelines recommend using RSBI as part of a structured weaning protocol including a formal spontaneous breathing trial.

Rapid Shallow Breathing Index (RSBI)

Calculate the Rapid Shallow Breathing Index (respiratory rate ÷ tidal volume in liters) to predict successful weaning from mechanical ventilation. RSBI <105 breaths/min/L predicts success.

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Frequently Asked Questions

What RSBI threshold predicts successful extubation?

Can RSBI be used as the sole weaning criterion?