Work of Breathing (WOB)

Work of breathing (WOB) quantifies the energy expenditure required for breathing. Elevated WOB may lead to respiratory fatigue and failure, particularly in neonates.

Disclaimer

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

Calculator

Compliance (mL/cmH2O)

Resistance (cmH2O/L/s)

Tidal Volume (mL)

Respiratory Rate (breaths/min)

Estimation Method

Elastic WOB/breath = Vt² / (2 × C) × 0.0981

Units: Joules per breath (Vt in L, C in L/cmH2O, converting cmH2O·L to Joules)

References

Hess DR, Kacmarek RM. Essentials of Mechanical Ventilation, 4th Edition.
Banner MJ. Respiratory muscle loading and the work of breathing. J Cardiothorac Vasc Anesth 1995;9:192-204.