Abstract
Body cell mass (BCM) is the metabolically active cell mass involved in O2 consumption, CO2 production and energy expenditure. BCM measurement has been suggested as a tool for the evaluation of nutritional status. Since BCM is closely related to energy expenditure, it could also represent a good reference value for the calculation of nutrient needs. In a recent issue of Critical Care, Ismael and colleagues used bioelectrical impedance analysis parameters and anthropometric variables to evaluate BCM in patients with acute kidney injury, before and after a hemodialysis session. The results of this study suggest that BCM is relatively insensitive to major body fluid shifts, a well known factor interfering with nutritional evaluation/monitoring and energy need calculations in the ICU. Thus, BCM seems to be a more 'stable' nutritional variable, as it is apparently less influenced by non-nutritional factors. The results of this paper emphasize the need to identify biologically sound parameters for nutritional status evaluation and energy need calculation in critically ill patients; in this regard, BCM could fulfill these expectations.
Highlights
Body cell mass (BCM) is the metabolically active cell mass involved in O2 consumption, CO2 production and energy expenditure
In a recent issue of Critical Care, Ismael and colleagues [1] reported the results of a study on 31 hemodynamically stable patients with acute kidney injury requiring hemodialysis and able to tolerate ultrafiltration rates of ≥5% body weight per session
They derived intra- and extracellular water volumes from low- and high-frequency resistances measured by multifrequency bioelectrical impedance analysis (BIA) of body compartments, before and after hemodialysis
Summary
Body cell mass (BCM) is the metabolically active cell mass involved in O2 consumption, CO2 production and energy expenditure. In a recent issue of Critical Care, Ismael and colleagues [1] reported the results of a study on 31 hemodynamically stable patients with acute kidney injury requiring hemodialysis and able to tolerate ultrafiltration rates of ≥5% body weight per session (mean weight loss of 3.8 kg).
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