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Keywords = prosthetic vascular stent

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15 pages, 6479 KiB  
Article
A Computational Study on Renal Artery Anatomy in Patients Treated with Fenestrated or Branched Endovascular Aneurysm Repair
by Yuzhu Wang, Yuna Sang, Wendong Li, Minjie Zhou, Yushun Zhao, Xiaodong He, Chao Wang, Xiaoqiang Li and Zhao Liu
Bioengineering 2025, 12(5), 482; https://doi.org/10.3390/bioengineering12050482 - 1 May 2025
Cited by 1 | Viewed by 433
Abstract
(1) Background: Renal artery occlusion after F/B EVAR for abdominal aortic aneurysm is a serious complication that may require re-intervention, and understanding the hemodynamic mechanisms by which it occurs is essential to optimize the surgical procedure. (2) Methods: We used computational fluid dynamics [...] Read more.
(1) Background: Renal artery occlusion after F/B EVAR for abdominal aortic aneurysm is a serious complication that may require re-intervention, and understanding the hemodynamic mechanisms by which it occurs is essential to optimize the surgical procedure. (2) Methods: We used computational fluid dynamics (CFD) to analyze the impact of various parameters on blood flow. Theoretical vascular models were constructed based on the common dimensions and angles of aortic stents and branch arteries in clinical practice. Actual case models were constructed from CT image data of six patients treated with F/B-EVAR. Data were collected for analysis after simulation and calculation by FLUENT software. (3) Results: Theoretical model simulations showed that a larger tilt angle of the branch stent, smaller branch entry depth, and larger branch stent diameter were beneficial for blood flow. In the case models, a significant difference in the tilt angle of the renal artery stents was observed between the high- and low-flow groups, while the differences in entry depth and branch stent diameter were not significant. Occluded renal arteries had lower WSS values than patent ones. (4) Conclusions: This study offers valuable guidance for optimizing stent placement in F/B EVAR to mitigate renal artery occlusion risk. Full article
(This article belongs to the Special Issue Cardiovascular Hemodynamic Characterization: Prospects and Challenges)
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18 pages, 2618 KiB  
Review
Diamond-like Carbon Coatings in the Biomedical Field: Properties, Applications and Future Development
by Yinglong Peng, Jihua Peng, Ziyan Wang, Yang Xiao and Xianting Qiu
Coatings 2022, 12(8), 1088; https://doi.org/10.3390/coatings12081088 - 1 Aug 2022
Cited by 47 | Viewed by 6595
Abstract
Repairment and replacement of organs and tissues are part of the history of struggle against human diseases, in addition to the research and development (R&D) of drugs. Acquisition and processing of specific substances and physiological signals are very important to understand the effects [...] Read more.
Repairment and replacement of organs and tissues are part of the history of struggle against human diseases, in addition to the research and development (R&D) of drugs. Acquisition and processing of specific substances and physiological signals are very important to understand the effects of pathology and treatment. These depend on the available biomedical materials. The family of diamond-like carbon coatings (DLCs) has been extensively applied in many industrial fields. DLCs have also been demonstrated to be biocompatible, both in vivo and in vitro. In many cases, the performance of biomedical devices can be effectively enhanced by coating them with DLCs, such as vascular stents, prosthetic heart valves and surgical instruments. However, the feasibility of the application of DLC in biomedicine remains under discussion. This review introduces the current state of research and application of DLCs in biomedical devices, their potential application in biosensors and urgent problems to be solved. It will be useful to build a bridge between DLC R&D workers and biomedical workers in order to develop high-performance DLC films/coatings, promote their practical use and develop their potential applications in the biomedical field. Full article
(This article belongs to the Section Surface Coatings for Biomedicine and Bioengineering)
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