Issn Print: 0265-0215

Publication Date: 2004/06/01


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Are the idric and sodium balance accurate in critically ill patients?: A-688

P. Bruzzone; D. Chiumello; I. Ilaria; P. Galli; G. Greco; A. Idda; M. Kurukian; A. Longobardi; L. Baggiani

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Excerpt

Background and Goal of Study: The critically ill patients are characterized by rapid fluid movements between intravascular, extravascular compartments. The idric and sodium balance can add useful informations for the daily clinical management. The idric and sodium balance are usually calculated by taking into account all the input (cristalloids, colloids, diet, drugs …), ouput (urine, perspiratio, drainage, …) with the relative sodium concentration for each of these elements.
Materials and Methods: In this study we study the accuracy of idric and sodium balance calculation compared to the body weight variations measured at the same time point. The body weight was measured using a dedicated bed balance (Hill-Rom), while in idric balance the perspiration was assumed to be 10 ml/Kg/every day.
5 critically ill patients (57 ± 21 years, BMI 26.4 ± 3.0 Kg/m2, 3 pneumonia, 1 sepsis, 1 heat stroke) were studied until ICU discharged or death for a total of 35 measurements.
Results and Discussions: In figure is shown the linear regression between idric and sodium balance.
We did not find any correlation between idric balance and body weight (r2 = 0.23, P < 0.05) and sodium balance and body weight (r2 = 0.19, P < 0.05).
Conclusion(s): The idric and sodium balance are highly correlated and may give useful clinical information however they are inaccuracy regarding the body weight variations, probably due to the difficult to estimate the “real” output (perspiration, gastrointestinal losses).
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