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.

Weight
Height
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.
Advertisement

How It Works

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

Each component has a specific meaning:

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

Note: Interpret the rsbi 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 (respiratory rate ÷ tidal volume in liters) to predict successful weaning from mechanical ventilation. RSBI <105 breaths/min/L predicts success. Use the rsbi result to inform your calculation.

Related Calculators

SBT Readiness

Medical

Driving Pressure

Medical

Respiratory Compliance

Medical

Frequently Asked Questions