RSBI — Rapid Shallow Breathing Index for Weaning

Calculate the Rapid Shallow Breathing Index (RSBI = RR / Vt in liters) to predict successful extubation, with RSBI <105 predicting successful weaning from mechanical ventilation.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Calculate the Rapid Shallow Breathing Index (RSBI = RR / Vt in liters) to predict successful extubation, with RSBI <105 predicting successful weaning from mechanical ventilation

Each component has a specific meaning:

  • Mechanical ventilation — The mechanical ventilation recorded for the scenario being assessed.

Note: Interpret the rsbi calculator result against the thresholds and context described above.

How to Use

Enter the mechanical ventilation for the scenario you are assessing. Calculate the Rapid Shallow Breathing Index (RSBI = RR / Vt in liters) to predict successful extubation, with RSBI <105 predicting successful weaning from mechanical ventilation. Use the rsbi calculator result to inform your calculation.

Frequently Asked Questions