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Updated: Dec 24, 2025

Evaluation of Fluid Overload by Bioelectrical Impedance Vectorial Analysis
Published on: August 17, 2022
B-type natriuretic peptide levels and diagnostic accuracy: excess fluid volume
Melina Maria Trojahn1, Sofia Louise Santin Barilli2, Daniela Dos Santos Bernardes3
1Instituto de Cardiologia da Fundação Universitária de Cardiologia (IC-FUC), Porto Alegre, Rio Grande do Sul, Brasil.
B-type natriuretic peptide (BNP) levels correlate with signs of fluid overload in acute decompensated heart failure patients. As patients improve, both BNP and fluid overload indicators decrease, suggesting BNP aids nursing assessment.
Area of Science:
- Cardiology
- Nursing Science
Background:
- Acute decompensated heart failure (ADHF) is a leading cause of hospitalization.
- Accurate assessment of fluid volume status is crucial for managing ADHF.
- Nursing diagnoses, like Excess Fluid Volume, guide patient care.
Purpose of the Study:
- To investigate the relationship between B-type natriuretic peptide (BNP) levels and the defining characteristics (DCs) of the nursing diagnosis Excess Fluid Volume (00026).
- To evaluate the utility of BNP as a biomarker in assessing fluid status in ADHF patients.
Main Methods:
- A cohort study included 64 patients hospitalized with ADHF.
- BNP levels and the number of DCs for Excess Fluid Volume were recorded at baseline and final assessment.
- Statistical analysis included Wilcoxon test for BNP values and paired t-test for DCs.
Main Results:
- A significant positive correlation was found between the change in BNP levels and the number of DCs at initial assessment.
- BNP levels and the number of DCs decreased as patients clinically compensated.
- BNP levels demonstrated a behavior consistent with clinical signs of congestion.
Conclusions:
- BNP levels correlate with clinical indicators of fluid overload in ADHF.
- BNP can decrease alongside clinical improvement and reduction in fluid overload signs.
- BNP may enhance the precision of nursing assessments for fluid volume status.
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