Why use IBW instead of actual weight for ventilators?

Tidal volume for mechanical ventilation is set at 6 mL/kg IBW (ARDSnet protocol) to prevent ventilator-induced lung injury regardless of actual weight.

What is the Devine formula?

Males: IBW = 50 kg + 2.3 kg per inch over 5 feet. Females: IBW = 45.5 kg + 2.3 kg per inch over 5 feet.

When should adjusted body weight be used?

Adjusted IBW (IBW + 0.4 × (actual weight - IBW)) is used for obese patients for aminoglycoside and vancomycin dosing.

Ideal Body Weight Calculator

Calculate ideal body weight using Devine formula (IBW = 50kg + 2.3kg per inch over 5ft for males) — used for ventilator tidal volume and drug dosing.

Use the full interactive calculator below, or

Related Calculators

BMI Adult

Medical

Adjusted Body Weight

Medical

BSA Calculator

Medical

Ideal Body Weight Calculator

Related Calculators

Frequently Asked Questions

Why use IBW instead of actual weight for ventilators?

What is the Devine formula?

When should adjusted body weight be used?