Are there any differences in the parathyroid response in the different types of renal osteodystrophy?
I Olaizola, A Aznarez, V Jorgetti, A Petraglia, H Caorsi, G Zcuna, L Fajardo, P Ambrosoni and N Mazzuchi Nephrology Center and Department of Nuclear Medicine, Hospital de Clinicas, Montevideo, Uruguay; Hospital das Clinicas, Sao Paulo, Brazil; Corresponding author address: Centro de Nefrologia ‘Renis’, Mario Cassinoni 1681, CP 11200 Montevideo, Uruguay With the purpose of studying the curve of parathyroid response to variations of serum calcium during dialysis, we studied 20 patients on haemodialysis: 10 women and 10 men, with different forms of bone disease diagnosed by bone biopsy (adynamic bone disease, mild hyperparathyroidism, severe hyperparathyroidism). In all patients, we performed parathyroid stimulation by 4 h dialysis with 1 mEq/l of Ca2+ in the dialysate, and an inhibition test in another dialysis session with 4 mEq/l of Ca2+, with a 48 h interval. Ca2+ and intact parathyroid hormone (iPTH) were measured prior to dialysis and every hour subsequently, to obtain a Ca2+-iPTH f
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