Gasto energético em ventilação mecânica: existe concordância entre a equação de Ireton-Jones e a calorimetria indireta?

Resting energy expenditure in critically ill patients: Evaluation methods and clinical applications

“…54,57 In Brazil, it is known that the application of this method to evaluate patients in hospitals is not a routine, since the equipment is expensive and requires specialized labor to be handled properly. 58 The predictive equations comprise a commonly used alternative method to determine the energy needs according to estimates of EE due to zero cost and ease of application. There are about 190 equations published in the literature using variables such as weight, height, age, gender, and body surface.…”

“…65 In a prospective observational study involving 40 adult patients admitted to the ICU, the authors observed that the REE estimated using the Ireton-Jones formula overestimated REE measured by IC, obtaining a mean difference between the IC and the equation of -353.83 kcal, ranging from -904.77 kcal to 197.11 kcal, with a significant difference between measured and estimated EE for the same individual (p<0.004). 58 Although the inaccuracy of predictive equations is shown in numerous studies, the unavailability of a calorimeter in many services causes such equation to be routinely used to assist in the estimation of energy needs, based on publications that demonstrate greater concordance between the estimated EE and that measured by IC.…”