Anais Brasileiros de Dermatologia (Feb 2011)

Avaliação da associação entre as alterações no metabolismo mineral e o prurido nos pacientes em hemodiálise Evaluating the association between alterations in mineral metabolism and pruritus in hemodialysis patients

  • Elisângela de Quevedo Welter,
  • Renata Hubner Frainer,
  • Adriana Maldotti,
  • Alexandre Losekann,
  • Magda Blessmann Weber

DOI
https://doi.org/10.1590/S0365-05962011000100003
Journal volume & issue
Vol. 86, no. 1
pp. 31 – 36

Abstract

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FUNDAMENTOS: prurido é o sintoma mais freqüente nos pacientes nefropatas em hemodiálise. Parâmetros laboratoriais anormais têm sido encontrados, com dados conflitantes. OBJETIVO: relacionar a prevalência de prurido com alterações no metabolismo mineral de pacientes em hemodiálise. MÉTODOS: estudo caso-controle. Avaliados 105 pacientes, sendo os pacientes com prurido os casos, preencheram o questionário do protocolo de pesquisa e a escala análoga visual, os dados laboratoriais foram coletados dos prontuários eletrônicos. RESULTADOS: a média de idade foi de 51,9 anos, 59% dos pacientes eram homens e 43% dos pacientes tinham prurido. Xerodermia ocorreu em 45% dos pacientes. Níveis elevados de Ca foram demonstrados em 55% dos pacientes e 47% tinham prurido. Quanto ao fósforo 60% tinham valores elevados e 43% tinham prurido. A relação Ca/P foi normal em todos. O paratormônio mostrou-se elevado em 95% dos pacientes, todos referindo prurido. CONCLUSÃO: houve associação estatisticamente significativa entre o grupo de pacientes com prurido e xerodermia. Os níveis séricos de Cálcio, Fósforo, relação Ca/P, PTHi e o tamanho do dialisador não apresentaram associação estatisticamente significativa com o prurido. Logo, encontramos relação importante entre xerodermia e prurido, sem relação com os parâmetros laboratoriais avaliados.BACKGROUND: Uremic pruritus is the most frequent symptom in long-term hemodialysis patients. Abnormal laboratory parameters have been found with conflicting data. OBJECTIVE: To correlate the prevalence of pruritus with alterations in mineral metabolism in hemodialysis patients. METHODS: This was a case-control study. A hundred and five patients on maintenance hemodialysis were evaluated: a group of patients with pruritus and a control group. They answered a research protocol questionnaire; laboratory data were collected from medical records and the patients with pruritus filled out a visual analogue scale (VAS) to measure pruritus level. RESULTS: The mean age was 51.9 years; 59% of the patients were men and 43% of the patients had pruritus. Xeroderma occurred in 45% of the patients. High levels of calcium were demonstrated in 55% of the patients and 47% had pruritus. 60% of the patients had high phosphorus levels and 43% had pruritus. The Ca/P ratio was normal for all the patients. Parathyroid hormone was high in 95% of the patients, all of them referring pruritus. CONCLUSION: There was a statistically significant association between the group of patients with pruritus and xeroderma. Serum calcium and phosphorus levels, Ca/P ratio, PTHi and size of the dialyzer did not show a statistically significant association with pruritus. Therefore, we found an important relationship between xeroderma and pruritus, with no relation with the assessed laboratory parameters.

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