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Journal of the Korean Society of Pediatric Nephrology 2014;18(2): 64-70. doi: https://doi.org/10.3339/jkspn.2014.18.2.64
Chronic Kidney Disease-mineral Bone Disorder and Active Vitamin D Analogs for Treating Severe Hyperparathyroidism in Children Receiving Chronic Peritoneal Dialysis
Eun Gu Kang, Joo Hoon Lee, Young Seo Park
Department of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Korea
Corresponding Author: Young Seo Park ,Tel: +82-2-3010-3386, Fax: +82-2-473-3725, Email: yspark@amc.seoul.kr
Received: September 5, 2014;  Accepted: October 1, 2014.
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ABSTRACT
Purpose: The aims of this study were to assess the clinical and laboratory profiles of chronic kidney disease-mineral bone disorder (CKD-MBD) and to assess the effects of treatment of active vitamin D analogs on severe hyperparathyroidism (SHPT) in pediatric patients on chronic peritoneal dialysis.
Methods: This is a retrospective study included 53 patients who had been undergoing dialysis for more than 1 year, between January 2003 and December 2012.
Results : Even after treatment with phosphate binders and active vitamin D analogs, the mean±standard deviation of the percentage of time during peritoneal dialysis that the patients’ serum concentrations of phosphorus, corrected total calcium, and parathyroid hormone (PTH) fell within the Kidney Disease Outcomes Quality Initiative recommended ranges was 25.06±17.47%, 53.30±23.03%, and 11.52± 9.51%, respectively. Clinical symptoms or radiological signs of CKD-MBD were observed in 10 patients (18.9%). There were significant differences in percentage of time that the serum intact PTH concentration was outside of the recommended range between patients with and without symptoms or signs of CKD-MBD (below recommended range, 11.74±7.37% vs. 40.77±25.39%, P <0.001; above the recommended range, 63.79±27.86% vs. 37.09±27.76%, P =0.022). Of the 25 patients with SHPT, high-dose alfacalcidol treatment was required in 13 patients that controlled SHPT in 7 of these patients, without marked complications.
Conclusion : Despite our efforts to manage CKD-MBD, patients’ met the recommended ranges from relevant guidelines at a low frequency. The treatment of high-dose active vitamin D analogs was required in about half of the patients with SHPT and effective in about half of them.
Key words: CKD-MBD | Peritoneal dialysis | Active vitamin D
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