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Does low-calcium dialysate accelerate secondary hyperparathyroidism in continuous ambulatory peritoneal dialysis patients? 1993

C Rotellar, and V Kinsel, and M Goggins, and G Tarman, and M Stull, and M J Mazzoni, and W F Mosher, and T A Rakowski, and J F Winchester
Georgetown University Medical Center, Washington, D.C. 20007.

A lower-calcium dialysate has been advocated for continuous ambulatory peritoneal dialysis (CAPD) patients for the purpose of increasing oral calcium intake as a phosphate binder and decreasing the need for aluminum-containing phosphate binders and, hence, decreasing the risk of aluminum intoxication. Twelve CAPD patients were evaluated retrospectively after switching from a dialysate containing 3.5 mEq/L of calcium to a new dialysate containing 2.5 mEq/L of calcium. Patients were on the new dialysate for at least 1 year. Serum calcium, phosphate, alkaline phosphatase, aluminum, and intact or N-terminal parathyroid hormone (I-PTH, N-PTH) were measured. Calcium, phosphate, and aluminum did not change significantly. Alkaline phosphatase doubled, but was not statistically significant. I-PTH and N-PTH rose from 2.9 +/- 2.24 to 7.4 +/- 7.4 times normal (p < 0.012). Three of 7 patients who had x-ray evaluations before, during, and 1 year after change of dialysate had radiographic progression of bone disease. Three patients required a parathyroidectomy due to the development of severe secondary hyperparathyroidism. In conclusion, the indiscriminate use of dialysate containing 2.5 mEq/L of calcium, in CAPD patients, may place the patients at higher risk for progression of hyperparathyroidism.

UI MeSH Term Description Entries
D006962 Hyperparathyroidism, Secondary Abnormally elevated PARATHYROID HORMONE secretion as a response to HYPOCALCEMIA. It is caused by chronic KIDNEY FAILURE or other abnormalities in the controls of bone and mineral metabolism, leading to various BONE DISEASES, such as RENAL OSTEODYSTROPHY. Secondary Hyperparathyroidism,Hyperparathyroidisms, Secondary,Secondary Hyperparathyroidisms
D007676 Kidney Failure, Chronic The end-stage of CHRONIC RENAL INSUFFICIENCY. It is characterized by the severe irreversible kidney damage (as measured by the level of PROTEINURIA) and the reduction in GLOMERULAR FILTRATION RATE to less than 15 ml per min (Kidney Foundation: Kidney Disease Outcome Quality Initiative, 2002). These patients generally require HEMODIALYSIS or KIDNEY TRANSPLANTATION. ESRD,End-Stage Renal Disease,Renal Disease, End-Stage,Renal Failure, Chronic,Renal Failure, End-Stage,Chronic Kidney Failure,End-Stage Kidney Disease,Chronic Renal Failure,Disease, End-Stage Kidney,Disease, End-Stage Renal,End Stage Kidney Disease,End Stage Renal Disease,End-Stage Renal Failure,Kidney Disease, End-Stage,Renal Disease, End Stage,Renal Failure, End Stage
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D010531 Peritoneal Dialysis, Continuous Ambulatory Portable peritoneal dialysis using the continuous (24 hours a day, 7 days a week) presence of peritoneal dialysis solution in the peritoneal cavity except for periods of drainage and instillation of fresh solution. CAPD,Continuous Ambulatory Peritoneal Dialysis
D010710 Phosphates Inorganic salts of phosphoric acid. Inorganic Phosphate,Phosphates, Inorganic,Inorganic Phosphates,Orthophosphate,Phosphate,Phosphate, Inorganic
D001842 Bone and Bones A specialized CONNECTIVE TISSUE that is the main constituent of the SKELETON. The principal cellular component of bone is comprised of OSTEOBLASTS; OSTEOCYTES; and OSTEOCLASTS, while FIBRILLAR COLLAGENS and hydroxyapatite crystals form the BONE MATRIX. Bone Tissue,Bone and Bone,Bone,Bones,Bones and Bone,Bones and Bone Tissue,Bony Apophyses,Bony Apophysis,Condyle,Apophyses, Bony,Apophysis, Bony,Bone Tissues,Condyles,Tissue, Bone,Tissues, Bone
D002118 Calcium A basic element found in nearly all tissues. It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes. Coagulation Factor IV,Factor IV,Blood Coagulation Factor IV,Calcium-40,Calcium 40,Factor IV, Coagulation
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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