血液流变学
红细胞变形能力
微循环
红细胞聚集
血液粘度
粘弹性
生物物理学
弹性模量
弹性(物理)
流变学
红细胞
化学
材料科学
生物医学工程
生物
医学
内科学
生物化学
复合材料
纤维蛋白原
作者
Bibiana Doris Riquelme,Patricia Foresto,Mabel D’Arrigo,F. Filippini,Juana Valverde
出处
期刊:PubMed
日期:2006-01-01
卷期号:35 (1-2): 277-81
被引量:2
摘要
Hypertension (HTA) and dyslipidemia (DLP) represent major risk factors for cardiovascular and cerebral-vascular ischemic disease. The mechanisms through which they can induce vascular damage are both metabolic and mechanical. Hemorheological alterations in HTA are result of changes affecting both red cell intrinsic structure and their interactions with the plasmatic components. Several hemorheological determinants (biochemical, ionic, metabolic and rheologic) could influence and produce an impaired erythrocyte deformability determining an increased flow resistance in the microcirculation. The "Erythrodeformeter" allows obtaining the stationary and dynamical linear parameters of erythrocyte membrane by laser diffractometry. Stationary and oscillatory shear-induced elongation of cells leads to an elliptical diffraction pattern, its geometric characteristics being directly related to those of deformed RBC. Erythrocyte stationary parameters (Deformability Index, surface viscosity and elastic modulus) were obtained in stationary regime. Complex viscoelastic parameters (dynamic elasticity, dynamic loss, viscous and elastic components of the complex viscosity) were obtained when operating in oscillating mode. The diffractometric method is sensitive to detect pathological or induced alterations on RBC membrane, which can affect blood flow in vivo. The rheological parameters obtained give important information about the erythrocyte membrane and allow to detect and characterize erythrocyte alterations in vascular pathologies.
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