Clinical Medicine & Physiology
Ireton-Jones Energy Expenditure Calculator: Revised 1997 Ventilator & Spontaneous ICU Equations
Estimate ICU & burn daily caloric needs without a metabolic cart using Corinne S. Ireton-Jones’s revised (1997) Ventilator-Dependent EEE(v) = 1784 - 11*Age + 5*W + 244*Male + 239*Trauma + 804*Burn and Spontaneously Breathing EEE(s) equations.
Account explicitly for mechanical ventilation, trauma, major burns, and obesity in ICU nutrition!
Derived directly against bedside indirect calorimetry in hospitalized surgical, trauma, burn, and medical patients by Corinne S. Ireton-Jones et al. (1992, J. Burn Care Rehabil.; revised 1997, J. Am. Diet. Assoc. / Nutr. Clin. Pract.), the Revised Ireton-Jones Equations separate mechanically ventilated patients from spontaneously breathing ward/step-down patients without requiring minute-ventilation V_E readings!
For Ventilator-Dependent patients: EEE(v) (kcal/day) = 1784 - 11 * Age_yr + 5 * Weight_kg + 244 * Sex_Male(0/1) + 239 * Trauma(0/1) + 804 * Burn(0/1)! For Spontaneously Breathing patients: EEE(s) (kcal/day) = 629 - 11 * Age_yr + 25 * Weight_kg - 609 * Obesity_BMI_gt_27(0/1), preventing dangerous overfeeding in obese non-ventilated patients via the -609 kcal/day adjustment!
| Clinical Patient Profile | Applicable Revised 1997 Equation | Estimated Daily Energy (kcal/day) |
|---|---|---|
| 50-yr-old 80 kg Ventilated Male Trauma (No Burn) | 1784 - 550 + 400 + 244 + 239 + 0 | 2,117 kcal/day |
| 50-yr-old 80 kg Ventilated Male Major Burn + Trauma | 1784 - 550 + 400 + 244 + 239 + 804 | 2,921 kcal/day |
| 50-yr-old 95 kg Spontaneous Obese Patient (BMI > 27) | 629 - 550 + 2375 - 609 | 1,845 kcal/day |
Revised 1997 Ireton-Jones Ventilator-Dependent Energy Expenditure EEE(v)
Evaluates 1784 - 11 * Age + 5 * Weight_kg + 244 * Male_0_1 + 239 * Trauma_0_1 + 804 * Burn_0_1 across Age B2 (18–110 yr), Actual Body Weight B3 (kg), Sex B4 (1=Male, 0=Female), Trauma B5 (0/1), and Burn B6 (0/1).
=IF(OR(B2 < 18, B2 > 110, B3 < 25, B3 > 350, AND(B4 <> 0, B4 <> 1), AND(B5 <> 0, B5 <> 1), AND(B6 <> 0, B6 <> 1)), "Invalid Adult Ireton-Jones Inputs", ROUND(1784 - 11 * B2 + 5 * B3 + 244 * B4 + 239 * B5 + 804 * B6, 0))Revised 1997 Ireton-Jones Spontaneously Breathing Energy Expenditure EEE(s)
Evaluates 629 - 11 * Age + 25 * Weight_kg - 609 * Obese_0_1 using obesity indicator B7 (1 if BMI > 27 kg/m^2, else 0).
=IF(OR(B2 < 18, B2 > 110, B3 < 25, B3 > 350, AND(B7 <> 0, B7 <> 1)), "Invalid Spontaneous Ireton-Jones Inputs", ROUND(629 - 11 * B2 + 25 * B3 - 609 * B7, 0))Try the example
Use the original values or change them to test your understanding.