Whole blood viscosity in plasma cell dyscrasias.
Clin Biochem
; 48(3): 122-4, 2015 Feb.
Article
em En
| MEDLINE
| ID: mdl-25526882
ABSTRACT
OBJECTIVES:
Plasma or serum hyperviscosity in plasma cell dyscrasias (PCD) has been described as a risk factor for circulatory disturbances. Whole blood viscosity (WBV) would theoretically be a better biomarker but has not been studied in PCD. DESIGN ANDMETHODS:
Plasma viscosity (PV) and WBV were measured in 89 subjects with PCD and in 60 healthy blood donors by free oscillation rheometry. A complete blood count was obtained using an automated hematology analyzer. Plasma proteins were quantitated by immunoturbidimetry.RESULTS:
The reference intervals for men & women were 1.16-1.36 & 1.16-1.38 mPa for PV, and 4.9-6.3 & 4.4-6.2 mPa for WBV, respectively. Of the PCD patients, 71% had PV above the reference limit and 40% were above the WBV limit. Multivariate analysis showed that WBV was independently related to hematocrit, PV, concentration of the monoclonal protein (M-protein), plasma fibrinogen concentration and albumin concentration. This model accounted for 76% of the variance in WBV. When the same model was applied to PV, only the concentration of the M-protein was significantly related and the model accounted only for 20% of the variance in PV.CONCLUSION:
PV cannot be used as a surrogate marker for WBV in PCD patients. Whole blood viscosity should replace plasma viscosity in patients with PCD.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Paraproteinemias
/
Viscosidade Sanguínea
Tipo de estudo:
Etiology_studies
/
Incidence_studies
/
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Aged
/
Female
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Humans
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Male
Idioma:
En
Revista:
Clin Biochem
Ano de publicação:
2015
Tipo de documento:
Article