scholarly journals Computational fluid dynamics of carotid arteries after carotid endarterectomy or carotid artery stenting based on postoperative patient-specific medical data

2013 ◽  
Vol 125 (1) ◽  
pp. 5-7
Author(s):  
Hitoshi Hayase ◽  
Koji Tokunaga ◽  
Toshio Nakayama ◽  
Kenji Sugiu ◽  
Ayumi Nishida ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Carotid Artery ◽  
Carotid Endarterectomy ◽  
Carotid Artery Stenting ◽  
Carotid Arteries ◽  
Medical Data ◽  
Patient Specific ◽  
Postoperative Patient

Computational Fluid Dynamics of Carotid Arteries After Carotid Endarterectomy or Carotid Artery Stenting Based on Postoperative Patient-Specific Computed Tomography Angiography and Ultrasound Flow Data

Neurosurgery ◽  
2011 ◽  
Vol 68 (4) ◽  
pp. 1096-1101 ◽  
Author(s):  
Hitoshi Hayase ◽  
Koji Tokunaga ◽  
Toshio Nakayama ◽  
Kenji Sugiu ◽  
Ayumi Nishida ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computed Tomography ◽  
Computational Fluid Dynamics ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Carotid Arteries ◽  
Internal Carotid ◽  
Patient Specific ◽  
Flow Data ◽  
Simulation Results

Abstract BACKGROUND: There are significant differences in the postoperative morphological and hemodynamic conditions of the carotid arteries between carotid artery stenting (CAS) and endarterectomy (CEA). OBJECTIVE: To compare the postoperative rheological conditions after CAS with those after CEA with patch angioplasty (patch CEA) through the use of computational fluid dynamics (CFD) based on patient-specific data. METHODS: The rheological conditions in the carotid arteries were simulated in 2 patients after CAS and in 2 patients after patch CEA by CFD calculations. Three-dimensional reconstruction of the carotid arteries was performed with the images obtained with computed tomography angiography. The streamlines and wall shear stress (WSS) were calculated by a supercomputer. Adequate boundary conditions were determined by comparing the simulation results with ultrasound flow data. RESULTS: CFD was successfully calculated for all patients. The differences between the flow velocities of ultrasound data and those of the simulation results were limited. In the streamline analysis, the maximum flow velocities in the internal carotid artery after patch CEA were around two-thirds of those after CAS. Rotational slow flow was observed in the internal carotid artery bulb after patch CEA. WSS analysis found regional low WSS near the outer wall of the bulb. High WSS was observed at the distal end of the arteriotomy after patch CEA and at the residual stenosis after CAS. CONCLUSION: CFD of postoperative carotid arteries disclosed the differences in streamlines and WSS between CAS and patch CEA. CFD may allow us to obtain adequate rheological conditions conducive to achieving the best clinical results.

Comparison of morphological and rheological conditions between conventional and eversion carotid endarterectomy using computational fluid dynamics – a pilot study

Vascular ◽  
2014 ◽  
Vol 23 (5) ◽  
pp. 474-482 ◽  
Author(s):  
S Demirel ◽  
D Chen ◽  
Y Mei ◽  
S Partovi ◽  
H von Tengg-Kobligk ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Shear Stress ◽  
Wall Shear Stress ◽  
Carotid Endarterectomy ◽  
Patient Specific ◽  
Specific Data ◽  
Computational Fluid Dynamics Analysis ◽  
Carotid Bulb ◽  
Wall Shear

Purpose: To compare postoperative morphological and rheological conditions after eversion carotid endarterectomy versus conventional carotid endarterectomy using computational fluid dynamics. Basic methods: Hemodynamic metrics (velocity, wall shear stress, time-averaged wall shear stress and temporal gradient wall shear stress) in the carotid arteries were simulated in one patient after conventional carotid endarterectomy and one patient after eversion carotid endarterectomy by computational fluid dynamics analysis based on patient specific data. Principal findings: Systolic peak of the eversion carotid endarterectomy model showed a gradually decreased pressure along the stream path, the conventional carotid endarterectomy model revealed high pressure (about 180 Pa) at the carotid bulb. Regions of low wall shear stress in the conventional carotid endarterectomy model were much larger than that in the eversion carotid endarterectomy model and with lower time-averaged wall shear stress values (conventional carotid endarterectomy: 0.03–5.46 Pa vs. eversion carotid endarterectomy: 0.12–5.22 Pa). Conclusions: Computational fluid dynamics after conventional carotid endarterectomy and eversion carotid endarterectomy disclosed differences in hemodynamic patterns. Larger studies are necessary to assess whether these differences are consistent and might explain different rates of restenosis in both techniques.

Using Computational Fluid Dynamics to Design and Optimize a Novel Endovascular Procedure for Carotid Stenosis Repair

2008 ◽  
Author(s):  
Victoria Yeh ◽  
C. Alberto Figueroa ◽  
Andrea Les ◽  
Jacqueline P. Ho ◽  
Ronald Dalman ◽  
...  
Keyword(s):  
United States ◽  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Carotid Artery ◽  
Carotid Arteries ◽  
The United States ◽  
The Third ◽  
Cerebral Blood Supply ◽  
The Brain ◽  
Over Time

The carotid arteries, located in both sides of the neck, are critical to supplying oxygenated blood to the brain. Over time, atherosclerotic plaque may accumulate in these vessels, causing them to narrow, which results in a reduced cerebral blood supply. This condition is known as carotid artery stenosis. In addition, small pieces of this plaque may become dislodged and travel to the brain, resulting in a stroke. Seven hundred thousand Americans suffer a stroke in the United States each year, and 150,000 cases are fatal, making it the third leading cause of death in the United States.

Analysis of restenosis after carotid artery stenting: Preliminary results using computational fluid dynamics based on three-dimensional angiography

2013 ◽  
Vol 20 (11) ◽  
pp. 1582-1587 ◽  
Author(s):  
Nahoko Uemiya ◽  
Chang-Joon Lee ◽  
Shoichiro Ishihara ◽  
Fumitaka Yamane ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Carotid Artery ◽  
Carotid Artery Stenting ◽  
Three Dimensional ◽  
Preliminary Results

The importance of blood rheology in patient-specific computational fluid dynamics simulation of stenotic carotid arteries

2020 ◽  
Vol 19 (5) ◽  
pp. 1477-1490 ◽  
Author(s):  
Jessica Benitez Mendieta ◽  
Davide Fontanarosa ◽  
Jiaqiu Wang ◽  
Phani Kumari Paritala ◽  
Tim McGahan ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Carotid Arteries ◽  
Blood Rheology ◽  
Dynamics Simulation ◽  
Patient Specific ◽  
Computational Fluid Dynamics Simulation
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