Mechanics of blood flow and wall deformation in the abdominal aorta

Мұқаба

Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

The medical problems of vascular mechanics are discussed in relation to the issues of blood flow and deformation of the walls in the abdominal part of the human aorta, including the formation of an aneurysm. The articles analyzed that present modern medical concepts about the hydromechanics of blood flow and deformations of arterial walls, as well as which provide the physical parameters necessary for mathematical modeling. The results of coupled mathematical modeling of blood flow and deformations of the walls in the abdominal part of the aorta in various pathological processes in it, considered in modeling as mechanical damage, including in the presence of an aneurysm, are presented. The effect of an aneurysm on the deposition of red blood cells from the blood flow is also analyzed.

Толық мәтін

Рұқсат жабық

Авторлар туралы

N. Verezub

Ishlinsky Institute for Problems in Mechanics RAS

Email: lisovenk@ipmnet.ru
Ресей, Moscow

D. Ghandilyan

Ishlinsky Institute for Problems in Mechanics RAS

Email: lisovenk@ipmnet.ru
Ресей, Moscow

D. Lisovenko

Ishlinsky Institute for Problems in Mechanics RAS

Хат алмасуға жауапты Автор.
Email: lisovenk@ipmnet.ru
Ресей, Moscow

V. Pantushov

A.S. Puchkov Ambulance and Emergency Medical Care Station

Email: lisovenk@ipmnet.ru
Ресей, Moscow

A. Prostomolotov

Ishlinsky Institute for Problems in Mechanics RAS

Email: lisovenk@ipmnet.ru
Ресей, Moscow

Әдебиет тізімі

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Әрекет
1. JATS XML
Жүктеу
2. Fig. 1. Basic calculation scheme: (a) – model of the abdominal aorta, here the holes for blood inflow and outflow are shown: i = 1, 2, … 5; (b) – points at which calculations were performed; (c) – thinning of the aortic wall in the vicinity of a potential defect.

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3. Fig. 2. Stress graphs for three variants of the calculation model: (a) – basic model (model 1); (b) – basic model with a thinned wall (model 2); (c) – basic model with a defect in the form of a hole (model 3). Dependencies 1, 2, 3, 4 and 5 are constructed for the points indicated in Fig. 1b.

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4. Fig. 3. Stress ratios (stress in the case of a thinned wall to stress in the normal state) at the corresponding points. Dependencies 1, 2, 3, 4 and 5 are constructed for the points indicated in Fig. 1b.

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5. Fig. 4. Visualization for models 1, 2, 3 of instantaneous states of blood flow at t = 2 s: (a) – velocity and (b) – pressure in the blood flow; (c) – field of displacements of the aortic wall.

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6. Fig. 5. Visualization for models 1, 2, 3 of instantaneous states of blood flow at t = 2.5 s: (a) – velocity and (b) – pressure in the blood flow; (c) – field of displacements of the aortic wall.

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7. Fig. 6. Components of the aorta: 1 – thoracic, 2 – abdominal.

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8. Fig. 7. Abdominal aorta with saccular aneurysm.

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9. Fig. 8. Schematic representation of an erythrocyte.

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10. Fig. 9. Mathematical model of blood flow in the abdominal aorta with an aneurysm consisting of a large “sac” 4 and a small “sac” 5, here the cross-section of blood inflow 1 and the cross-section of its outflow 2, 3 are shown.

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11. Fig. 10. Pulsating wave of flow velocity (a) and blood flow pattern (b) in the abdominal aorta, velocity pulsations in section 2 (c).

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12. Fig. 11. Change in the concentration of erythrocytes, % (a), diagram of sections (b) and for them – graphs of the concentration of erythrocytes (c).

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