Effect of Emissary Vein on Hemodynamics of the Transverse- Sigmoid Sinus Junction

Objective: To investigate the effect of the blood flow direction and afflux location of emissary veins (EVs) on the hemodynamics of the transverse-sigmoid sinus (TS-SS) junction.Methods: A patient-specific geometric model was constructed using computed tomography venography (CTV) and 4D flow MR data...

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Autores principales:	Xiaoyu Qiu, Pengfei Zhao, Xiaoshuai Li, Heyu Ding, Han Lv, Zhenxia Mu, Xiaofei Xue, Shusheng Gong, Zhenghan Yang, Bin Gao, Zhenchang Wang
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	pulsatile tinnitus emissary veins medical imaging computational fluid dynamics hemodynamics Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571
Acceso en línea:	https://doaj.org/article/4de6fd8a0bc741e18e4578be9e41f526
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spelling	oai:doaj.org-article:4de6fd8a0bc741e18e4578be9e41f5262021-11-12T06:38:37ZEffect of Emissary Vein on Hemodynamics of the Transverse- Sigmoid Sinus Junction1662-516110.3389/fnhum.2021.707014https://doaj.org/article/4de6fd8a0bc741e18e4578be9e41f5262021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fnhum.2021.707014/fullhttps://doaj.org/toc/1662-5161Objective: To investigate the effect of the blood flow direction and afflux location of emissary veins (EVs) on the hemodynamics of the transverse-sigmoid sinus (TS-SS) junction.Methods: A patient-specific geometric model was constructed using computed tomography venography (CTV) and 4D flow MR data from a venous pulsatile tinnitus (PT) patient. New EV models were assembled with the afflux at the superior, middle and inferior portions of the SS from the original model, and inlet and outlet directions were applied. Computational fluid dynamics (CFD) simulation was performed to analyze the wall pressure and flow pattern of the TS-SS junction in each condition.Results: Compared to the model without EVs, the wall pressure was greatly increased in models with inlet flow and greatly decreased in models with outlet flow. The more closely the EV approached the TS-SS, the larger the pressure in models with inlet flow, and the smaller the pressure in models with outlet flow. The flow streamline in the lateral part of the TS-SS junction was smooth in all models. The streamlines in the medial part were regular spirals in outlet models and chaotic in inlet models. The streamlines showed no obvious changes regardless of afflux location. The velocity at the TS-SS junction of inlet models were uniform, medium-low flow rate, while in control and outlet models were the lateral high flow rate and the central low flow rate.Conclusion: The flow direction and afflux location of EVs affect the hemodynamics of the TS-SS junction, which may influence the severity of PT.Xiaoyu QiuPengfei ZhaoXiaoshuai LiHeyu DingHan LvZhenxia MuXiaofei XueShusheng GongZhenghan YangBin GaoZhenchang WangFrontiers Media S.A.articlepulsatile tinnitusemissary veinsmedical imagingcomputational fluid dynamicshemodynamicsNeurosciences. Biological psychiatry. NeuropsychiatryRC321-571ENFrontiers in Human Neuroscience, Vol 15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	pulsatile tinnitus emissary veins medical imaging computational fluid dynamics hemodynamics Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571
spellingShingle	pulsatile tinnitus emissary veins medical imaging computational fluid dynamics hemodynamics Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Xiaoyu Qiu Pengfei Zhao Xiaoshuai Li Heyu Ding Han Lv Zhenxia Mu Xiaofei Xue Shusheng Gong Zhenghan Yang Bin Gao Zhenchang Wang Effect of Emissary Vein on Hemodynamics of the Transverse- Sigmoid Sinus Junction
description	Objective: To investigate the effect of the blood flow direction and afflux location of emissary veins (EVs) on the hemodynamics of the transverse-sigmoid sinus (TS-SS) junction.Methods: A patient-specific geometric model was constructed using computed tomography venography (CTV) and 4D flow MR data from a venous pulsatile tinnitus (PT) patient. New EV models were assembled with the afflux at the superior, middle and inferior portions of the SS from the original model, and inlet and outlet directions were applied. Computational fluid dynamics (CFD) simulation was performed to analyze the wall pressure and flow pattern of the TS-SS junction in each condition.Results: Compared to the model without EVs, the wall pressure was greatly increased in models with inlet flow and greatly decreased in models with outlet flow. The more closely the EV approached the TS-SS, the larger the pressure in models with inlet flow, and the smaller the pressure in models with outlet flow. The flow streamline in the lateral part of the TS-SS junction was smooth in all models. The streamlines in the medial part were regular spirals in outlet models and chaotic in inlet models. The streamlines showed no obvious changes regardless of afflux location. The velocity at the TS-SS junction of inlet models were uniform, medium-low flow rate, while in control and outlet models were the lateral high flow rate and the central low flow rate.Conclusion: The flow direction and afflux location of EVs affect the hemodynamics of the TS-SS junction, which may influence the severity of PT.
format	article
author	Xiaoyu Qiu Pengfei Zhao Xiaoshuai Li Heyu Ding Han Lv Zhenxia Mu Xiaofei Xue Shusheng Gong Zhenghan Yang Bin Gao Zhenchang Wang
author_facet	Xiaoyu Qiu Pengfei Zhao Xiaoshuai Li Heyu Ding Han Lv Zhenxia Mu Xiaofei Xue Shusheng Gong Zhenghan Yang Bin Gao Zhenchang Wang
author_sort	Xiaoyu Qiu
title	Effect of Emissary Vein on Hemodynamics of the Transverse- Sigmoid Sinus Junction
title_short	Effect of Emissary Vein on Hemodynamics of the Transverse- Sigmoid Sinus Junction
title_full	Effect of Emissary Vein on Hemodynamics of the Transverse- Sigmoid Sinus Junction
title_fullStr	Effect of Emissary Vein on Hemodynamics of the Transverse- Sigmoid Sinus Junction
title_full_unstemmed	Effect of Emissary Vein on Hemodynamics of the Transverse- Sigmoid Sinus Junction
title_sort	effect of emissary vein on hemodynamics of the transverse- sigmoid sinus junction
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/4de6fd8a0bc741e18e4578be9e41f526
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Effect of Emissary Vein on Hemodynamics of the Transverse- Sigmoid Sinus Junction

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