ELIZA

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469466 occurrences (No.35 in the rank) during 5 years in the PubMed. [no cache] 500 found

189) To address these issues, we adopted a multiphase non-Newtonian model to carry out a comparative study between a helical artery bypass graft (ABG) and a conventional ABG in which the blood flow is composed of plasma and RBCs.

--- ABSTRACT ---

PMID:24156553 DOI:10.1080/10255842.2013.845880

2015 Computer methods in biomechanics and biomedical engineering

* Numerical investigation of haemodynamics in a helical-type artery bypass graft using non-Newtonian multiphase model.

- The classic single-phase Newtonian blood flow model ignores the motion of red blood cells (RBCs) and their interaction with plasma. To address these issues, we adopted a multiphase non-Newtonian model to carry out a comparative study between a helical artery bypass graft (ABG) and a conventional ABG in which the blood flow is composed of plasma and RBCs. The investigation focused on the mechanism of RBC buildup in an ABG but the haemodynamic parameters obtained by single-phase and multiphase models were also compared. The aggregation of RBCs along the inside wall of a conventional ABG and at the heel of its distal anastomosis was predicted while a poor aggregation was observed along the helical ABG. In addition, RBCs were observed to gradually sediment along the gravity direction. However, the computed haemodynamic parameters by multiphase model qualitatively agreed well with those by single-phase model. It was concluded that (1) the single-phase computational fluid dynamics (CFD) is reasonable to do the computation of haemodynamic parameters in ABGs; (2) secondary flow does not definitely produce buildup of RBCs in the inside curvature, its configuration played an important role in the movement of RBCs and the dominating one-way rotating flow in a helical ABG guaranteed no buildup of RBCs on its inside wall and (3) gravity direction is important for the movement of RBCs which may help to explain why doing exercise is good for human health. This study helps to shed light on the migration of RBCs in ABGs, which cannot be explored by single-phase CFD models, and provides more understanding of the underlying flow mechanism for ABG failure.

--- ABSTRACT END ---

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(1)63 of	(12)7 as	(23)3 assessment	(34)2 demonstrated
(2)55 null	(13)6 are	(24)3 fit	(35)2 it
(3)35 for	(14)6 system	(25)3 revealed	(36)2 joints
(4)28 was	(15)5 a	(26)3 showed	(37)2 may
(5)26 to	(16)5 selection	(27)3 systems	(38)2 not
(6)16 and	(17)5 which	(28)3 were	(39)2 results
(7)16 in	(18)5 will	(29)2 allows	(40)2 species
(8)16 is	(19)4 can	(30)2 analyses	(41)2 such
(9)16 with	(20)4 parameters	(31)2 appropriate	(42)2 used
(10)12 that	(21)4 using	(32)2 biological
(11)8 the	(22)4 we	(33)2 consists

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--- WordNet output for model --- =>模型, 作る, 形に表わす, 模範, モデル, 型, 模型の, 模範となる, かたどる, 手本, モデルをする, 手本となる Overview of noun model The noun model has 9 senses (first 7 from tagged texts) 1. (19) model, theoretical account, framework -- (a hypothetical description of a complex entity or process; "the computer program was based on a model of the circulatory and respiratory systems") 2. (11) model -- (a type of product; "his car was an old model") 3. (6) model, poser -- (a person who poses for a photographer or painter or sculptor; "the president didn't have time to be a model so the artist worked from photos") 4. (4) model, simulation -- (representation of something (sometimes on a smaller scale)) 5. (3) exemplar, example, model, good example -- (something to be imitated; "an exemplar of success"; "a model of clarity"; "he is the very model of a modern major general") 6. (1) model, role model -- (someone worthy of imitation; "every child needs a role model") 7. (1) model, example -- (a representative form or pattern; "I profited from his example") 8. mannequin, manikin, mannikin, manakin, fashion model, model -- (a woman who wears clothes to display fashions; "she was too fat to be a mannequin") 9. model, modelling, modeling -- (the act of representing something (usually on a smaller scale)) Overview of verb model The verb model has 6 senses (first 2 from tagged texts) 1. (1) model, pattern -- (plan or create according to a model or models) 2. (1) model, mold, mould -- (form in clay, wax, etc; "model a head with clay") 3. model, pose, sit, posture -- (assume a posture as for artistic purposes; "We don't know the woman who posed for Leonardo so often") 4. model -- (display (clothes) as a mannequin; "model the latest fashion") 5. model, simulate -- (create a representation or model of; "The pilots are trained in conditions simulating high-altitude flights") 6. model, mock up -- (construct a model of; "model an airplane") Overview of adj model The adj model has 1 sense (first 1 from tagged texts) 1. (1) exemplary, model -- (worthy of imitation; "exemplary behavior"; "model citizens") --- WordNet end ---