Blood Rheology and Its Implication in Flow of Blood

Quemada, D.

doi:10.1007/978-3-7091-4342-1_1

Cited by 17 publications

(21 citation statements)

References 86 publications

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“…The main advantage of the Ree-Eyring model is the possibility of introducing two distinct processes that could correspond to red cell aggregation and deformation/ orientation, respectively [7,24,25]. The amplitudes of the two processes would be a measure of the corresponding phenomena, thus giving a quantitative measure of these important effects.…”

Section: Discussionmentioning

confidence: 99%

“…The Quemada model, according to many authors, very well describes the flow curves [12,23,24]. The important advantage of the Quemada model is the simultaneous and explicit consideration of all the most important factors affecting blood viscosity: shear rate, plasma viscosity, hematocrit and red cell aggregation/deformation.…”

Section: Discussionmentioning

confidence: 99%

“…aggregation and deformation/reorientation, are characterized by the amplitude of viscosity change (A i ) and its relaxation time (t i ) [7,24,25]. The rheograms present the apparent relative viscosity as a function of the shear rate (Fig.…”

Section: Description Of Rheological Modelsmentioning

confidence: 99%

“…Mathematical formulations and individual parameter descriptions of the applied rheological models: Casson, Ree-Eyring and Quemada [12,13,23,24] are shown in Table 1. The model formula was expressed in terms of the shear rate, shear stress relation (for Casson) or relative apparent viscosity for the remaining formulas.…”

Section: Description Of Rheological Modelsmentioning

confidence: 99%

“…The Quemada formula [16,17,23,24] introduces the so-called intrinsic viscosity of erythrocyte (k Q ), the shear rate dependence of which accounts for the red cell shape variability and aggregates' formation. In geometrical interpretation of the k Q , its reciprocal value is equal to the Faster deformation/reorientation process (relaxation time t 2 < t 1 )…”

Section: Description Of Rheological Modelsmentioning

confidence: 99%

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Comparison of three rheological models of shear flow behavior studied on blood samples from post-infarction patients

Marcinkowska‐Gapińska

Gapiński

Elikowski³

et al. 2007

Med Bio Eng Comput

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Quantitative analysis of blood viscosity was performed on the basis of mathematical models of non-Newtonian fluid shear flow behavior (Casson, Ree-Eyring and Quemada). A total of 100 blood samples were drawn from clinically stable survivors of myocardial infarction, treated with aspirin or acenocoumarol and controls to these drugs. Whole blood and plasma viscosity were measured at a broad range of shear rates using a rotary-oscillating viscometer Contraves LS40. Numerical analysis of the experimental data was carried out by means of linear (for Casson) and non-linear regression for the remaining models. In the evaluation of the results, both the fit quality and physical interpretation of the models' parameters were considered. The Quemada model fitted most precisely with the experimental findings and, despite the controversies concerning the relationship between in vivo tissue perfusion and in vitro rheological measurements, seemed to be a valuable method enhancing investigation possibilities of cardiovascular patients. Our results suggest that aspirin does not affect blood rheological properties, while acenocoumarol may slightly alter red cell deformability and rouleaux formation.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Description Of Rheological Modelsmentioning

confidence: 99%

Section: Description Of Rheological Modelsmentioning

confidence: 99%

Section: Description Of Rheological Modelsmentioning

confidence: 99%

See 3 more Smart Citations

Comparison of three rheological models of shear flow behavior studied on blood samples from post-infarction patients

Marcinkowska‐Gapińska

Gapiński

Elikowski³

et al. 2007

Med Bio Eng Comput

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Steady flow in the Willis circle using a Quemada model

Postelnicu

Florea

Pecurariu

2007

Proc Appl Math and Mech

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The paper presents new results on the dynamics of blood flow in the Willis circle, by taking into account the non-Newtonian nature of the blood through a Quemada model. In previous papers we performed a steady analysis of the blood flow in the Willis polygon, by considering the blood as a Newtonian fluid. In hemodynamics this is the first step, while taking into account the non-Newtonian behaviour of the fluid is called a second order approach. This is in fact the aim of our paper, to compare the results (blood flow rates and pressures) obtained in a non-Newtonian approach with those furnished by a Newtonian modeling of the blood. *

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