Abstract
Background
Children with a solitary functioning kidney are at increased risk of developing chronic kidney disease. Hypertension may be an early indicator of renal dysfunction in these patients. We determined blood pressure (BP) profiles of children with a solitary functioning kidney by using ambulatory BP monitoring (ABPM).
Methods
To assess the occurrence with (pre)hypertension, we compared ABPM to office BP measurement in 47 children with a solitary functioning kidney. None of the subjects used antihypertensive agents or had been hypertensive during previous clinical visits.
Results
Mean age of study subjects was 12.7 (±3.3) years. Hypertension was identified in ten (21 %) subjects with ABPM, whereas only two (4 %) children were hypertensive during office BP measurement (p < 0.01). Fifteen (32 %) children had an ABPM standard deviation (SD) value ≥90th percentile versus six (13 %) subjects based on office BP measurement (p = 0.051). Although 24-h ABPM SD scores were higher in the congenital type than in the acquired type of solitary functioning kidney (p ≤ 0.01), the proportions of subjects with 24-h ABPM hypertension were similar between groups (congenital 25 % versus acquired 16 %; p = NS).
Conclusions
Based on ABPM, one in five children with a solitary functioning kidney has hypertension. As the majority of these subjects were not hypertensive during office BP measurements, ABPM should be considered in the clinical management of solitary functioning kidney patients.
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Acknowledgments
We thank all patients and their parents for participating in the KIMONO study, and Monique Koot for her excellent administrative assistance.
Support
RW is funded by a grant from Fonds Nuts Ohra Zorgsubsidies, Amsterdam, The Netherlands (project number 1101-058).
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Fig2
Supplemental figure 1 Bland–Altman plots for (a), systolic blood pressure and (b), diastolic blood pressure. Circles represent systolic BP SD scores, whereas diastolic BP SD scores are displayed by triangles. Mean bias (difference between 24–h ABPM and office BP SD scores) is depicted by the solid line and the 95 % limits of agreement (i.e., mean bias ± 1.96 × SD) are shown by the gray area. ABPM ambulatory blood pressure monitoring; BP blood pressure (GIF 16 kb)
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Westland, R., Schreuder, M.F., van der Lof, D.F. et al. Ambulatory blood pressure monitoring is recommended in the clinical management of children with a solitary functioning kidney. Pediatr Nephrol 29, 2205–2211 (2014). https://doi.org/10.1007/s00467-014-2853-0
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DOI: https://doi.org/10.1007/s00467-014-2853-0