Abstract

to analyze the frequency of hypoparathyroidism and of its recurrence after parathyroidectomy in dialysis patients according to different existing classifications. we conducted a retrospective study of 107 consecutive dialysis patients undergoing total parathyroidectomy with immediate autograft in a tertiary hospital from 2006 to 2010. We studied the changes in PTH levels in the postoperative period over time. Were grouped patients according to different PTH levels targets recommended according to the dosage method and by the American and Japanese Nephrology Societies, and by an International Experts Consortium. after parathyroidectomy, there was sustained reduction in serum calcium and phosphatemia. The median value of PTH decreased from 1904pg/ml to 55pg/ml in 12 months. Depending on the considered target level, the proportion of patients below the target ranged between 17% and 87%. On the other hand, the proportion of patients with levels above the target ranged from 3% to 37%. the application of different recommendations for PTH levels after parathyroidectomy in dialysis patients may lead to incorrect classifications of hypoparathyroidism or recurrent hyperparathyroidism and resultin discordant therapeutic conducts. analisar as frequências de hipoparatireoidismo e de recidiva do hiperparatireoidismo após paratireoidectomia em pacientes dialíticos de acordo com diferentes classificações existentes. estudo retrospectivo de 107 pacientes dialíticos consecutivamente submetidos à paratireoidectomia total com autoenxerto imediato em um hospital terciário no período de 2006 a 2010. A variação dos níveis de PTH no pós-operatório foi estudada ao longo do tempo. Os pacientes foram agrupados de acordo com diferentes metas de níveis de PTH recomendados de acordo com o método de dosagem e pelas sociedades de nefrologia americana, japonesa e de um consórcio internacional de especialistas. após a paratireoidectomia, houve redução sustentada da calcemia e fosfatemia. O valor mediano do PTH reduziu-se de 1904pg/ml para 55pg/ml, em 12 meses. Dependendo do nível alvo considerado, a proporção de pacientes abaixo da meta variou entre 17% e 87%. Ao contrário, a proporção de pacientes com níveis acima da meta variou de 3% a 37%. O emprego de diferentes recomendações de níveis de PTH em pacientes dialíticos após paratireoidectomia pode levar a classificações incorretas de hipoparatireoidismo ou hiperparatireoidismo recidivado e implicar em condutas terapêuticas discordantes.

Highlights

  • Despite recent advances in the clinical treatment of secondary hyperparathyroidism (2HPT) in dialysis patients, parathyroidectomy (PTx) may be necessary in some cases, especially in developing countries, where 10.7% of dialysis patients present parathyroid hormone (PTH) levels exceeding 1000pg/ml[1]

  • PTH levels werenot often monitored after PTx

  • We studied dialysis patients operated for 2HPT at a single institution from January 2006 to March 2010

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Summary

Introduction

Despite recent advances in the clinical treatment of secondary hyperparathyroidism (2HPT) in dialysis patients, parathyroidectomy (PTx) may be necessary in some cases, especially in developing countries, where 10.7% of dialysis patients present parathyroid hormone (PTH) levels exceeding 1000pg/ml[1]. Parathyroidectomy is effective and its cost is lower than the long-term use of cinacalcet[2]. Surgical treatment may improve survival in long-term dialysis population with 2HPT3,4. PTH levels werenot often monitored after PTx. The objective of the operation was to reverse the 2HPT symptoms and to achieve normocalcaemia, without the need for supplemental calcium or vitamin D analogues[5]. The availability of PTH dosage exams led to better, still imperfect, understanding of the correlation between

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