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Blood Purif ; 32(4): 271-7, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21860232

RESUMO

BACKGROUND: Guidelines recommend regular measurements of the delivered hemodialysis dose Kt/V. Nowadays, automatic non-invasive online measurements are available as alternatives to the conventional method with blood sampling, laboratory analysis, and calculation. METHODS: In a prospective clinical trial, three different methods determining dialysis dose were simultaneously applied: Kt/V(Dau) (conventional method with Daugirdas' formula), Kt/V(OCM) [online clearance measurement (OCM) with urea distribution volume V based on anthropometric estimate], and Kt/V(BCM) [OCM measurement with V measured by bioimpedance analysis (Body Composition Monitor)]. RESULTS: 1,076 hemodialysis patients were analyzed. The dialysis dose was measured as Kt/V(Dau) = 1.74 ± 0.45, Kt/V(OCM) = 1.47 ± 0.34, and Kt/V(BCM) = 1.65 ± 0.42. The difference between Kt/V(OCM) and Kt/V(BCM) was due to the difference between anthropometric estimated V(Watson) and measured V(BCM). Compared to Kt/V(Dau), Kt/V(OCM) was 15% lower and Kt/V(BCM) 5% lower. Kt/V(Dau) was incidentally prone to falsely high values due to operative errors, whereas in these cases OCM-based measurements Kt/V(OCM) and Kt/V(BCM) delivered realistic values. CONCLUSIONS: The automated OCM Kt/V(OCM) with anthropometric estimation of urea distribution volume was the easiest method to use, but Kt/V(BCM) with measured urea distribution volume was closer to the conventional method.


Assuntos
Diálise Renal/métodos , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Ureia/metabolismo
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