Airway Resistance (Raw)

Airway resistance (Raw) is the opposition to airflow caused by the conducting airways. It is determined from the transairway pressure difference and flow rate.

Disclaimer

This calculator is for educational purposes only. Always verify with clinical judgment.

Calculator

PIP (cmH2O)

Plateau Pressure (cmH2O)

Flow Rate (L/min)

Formula

Raw = (PIP - Pplat) / Flow

Flow is converted from L/min to L/sec for result in cmH2O/L/s

References

Hess DR, Kacmarek RM. Essentials of Mechanical Ventilation, 4th Edition.
Walsh BK. Neonatal and Pediatric Respiratory Care, 5th Edition.