Department of Pediatrics, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA.
Pediatr Nephrol. 2013 Apr;28(4):617-25. doi: 10.1007/s00467-012-2381-8. Epub 2013 Feb 5.
In order to minimize complications on the skeleton and to prevent extraskeletal calcifications, the specific aims of the management of chronic kidney disease mineral and bone disorder (CKD-MBD) are to maintain blood levels of serum calcium and phosphorus as close to the normal range as possible, thereby maintaining serum parathyroid hormone (PTH) at levels appropriate for CKD stage, preventing hyperplasia of the parathyroid glands, avoiding the development of extra-skeletal calcifications, and preventing or reversing the accumulation of toxic substances such as aluminum and β2-microglobulin. In order to limit cardiovascular calcification, daily intake of elemental calcium, including from dietary sources and from phosphate binders, should not exceed twice the daily recommended intake for age and should not exceed 2.5 g/day. Calcium-free phosphate binders, such as sevelamer hydrochloride and sevelamer carbonate, are safe and effective alternatives to calcium-based binders, and their use widens the margin of safety for active vitamin D sterol therapy. Vitamin D deficiency is highly prevalent across the spectrum of CKD, and replacement therapy is recommended in vitamin D-deficient and insufficient individuals. Therapy with active vitamin D sterols is recommended after correction of the vitamin D deficiency state and should be titrated based on target PTH levels across the spectrum of CKD. Although the use of calcimimetic drugs has been proven to effectively control the biochemical features of secondary hyperparathyroidism, there is very limited experience with the use of such agents in pediatric patients and especially during the first years of life. Studies are needed to further define the role of such agents in the treatment of pediatric CKD-MBD.
为了最大限度地减少骨骼并发症并防止骨骼外钙化,慢性肾脏病矿物质和骨异常(CKD-MBD)管理的具体目标是将血清钙和磷的血液水平保持在尽可能接近正常范围,从而将甲状旁腺激素(PTH)保持在与 CKD 阶段相适应的水平,防止甲状旁腺增生,避免骨骼外钙化的发展,并防止或逆转铝和β2-微球蛋白等有毒物质的积累。为了限制心血管钙化,包括饮食来源和磷酸盐结合剂在内的元素钙的每日摄入量不应超过年龄每日推荐摄入量的两倍,且不应超过 2.5g/天。无钙磷酸盐结合剂,如盐酸司维拉姆和碳酸司维拉姆,是钙基结合剂的安全有效替代品,其使用拓宽了活性维生素 D 固醇治疗的安全范围。维生素 D 缺乏在 CKD 范围内非常普遍,建议在维生素 D 缺乏和不足的个体中进行替代治疗。在纠正维生素 D 缺乏状态后,建议使用活性维生素 D 固醇进行治疗,并应根据 CKD 范围内的目标 PTH 水平进行滴定。虽然已经证明使用钙敏感受体药物可以有效地控制继发性甲状旁腺功能亢进的生化特征,但在儿科患者中,特别是在生命的最初几年中,使用此类药物的经验非常有限。需要研究进一步确定此类药物在治疗儿科 CKD-MBD 中的作用。
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