Abstract

Lung ultrasound (LUS) is a non-invasive technique for estimating extravascular lung water in patients with end-stage renal disease and heart diseases. In this study, we examined an association between the severity of lung congestion as detected by LUS B-lines (LUS comets), anemia, and serum biomarker N-terminal pro-brain natriuretic peptide (NT-proBNP) in peritoneal dialysis (PD) patients. 19 patients, who were treated with PD in our dialysis center were enrolled. On the day of their routine check-up, we performed a lung auscultation, LUS on 28 typical locations and determined blood levels of hemoglobin and NT-proBNP. The average age of patients was 54 (range 30 - 71) years, the average duration of PD treatment was 53 (range 10 - 194) months, 63% (12) of the patients were male. Nine (47.4%) patients had peripheral edema, and only 1 (5.3%) patient had inspiratory crackles. Using LUS, we found mean 17 (range 1 - 87) lung comets. Mean hemoglobin level was 108.6 g/L (SD ± 10.4), mean NT-proBNP level 1,151 pmol/L (SD ± 1,077). We found a statistically significant correlation between the number of lung comets and hemoglobin level (r = -0.655; p = 0.002) and NT-proBNP (r = 0.759; p < 0.0001). Multiple regression analysis with the number of lung comets as dependent variable and hemoglobin and NT-proBNP levels as independent variables confirmed a statistically significant association between the number of lung comets and NT-proBNP (β = 0.572; p = 0.009). In PD patients, the number of LUS comets is associated with hemoglobin and NT-proBNP.

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