相关实验视频
Updated: May 6, 2026

10:46
Doppler Optical Coherence Tomography of Retinal Circulation
Published on: September 18, 2012
18.9K
视网膜动脉急性闭塞的特征:一个系统性审查
1Department of Ophthalmology, Imam Abdulrahman Bin Faisal University, Dammam 34212, Saudi Arabia.
Healthcare (Basel, Switzerland)
|August 28, 2025
概括
光学一致性断层扫描 (OCTA) 能够有效地检测急性视网膜动脉封闭 (RAO) 的微血管变化. 这种非侵入性工具有助于诊断,监测和预后,将OCTA发现与视觉结果相关联.
科学领域:
- 眼科 眼科
- 医学成像
- 血管生物学
背景情况:
- 急性视网膜动脉封闭 (RAO) 是一种导致视力丧失的严重疾病.
- 视网膜的微血管变化是RAO的主要病理特征.
- 对于评估这些变化而言,非侵入性成像方法至关重要.
研究的目的:
- 系统地审查急性RAO中的光学一致性断层扫描血管学 (OCTA) 的诊断和预后特征.
- 专注于表面和深层毛细管的血管变化,胸膜和周毛细管区域.
- 评估OCTA在RAO诊断,监测和预测结果中的作用.
主要方法:
- 在主要数据库 (PubMed,科学网络,Scopus,EMBASE,谷歌学者,Cochrane) 进行全面的文献搜索,直到2025年4月.
- 包含的标准集中在评估急性RAO的研究上;排除病例报告,非英语文章.
- 使用非随机干预研究偏差风险 (ROBINS-I) 工具评估方法质量.
主要成果:
- 包括10项研究,证实OCTA是评估RAO微血管变化的有价值的非侵入性工具.
- 主要发现包括表面 (SCP) 和深层 (DCP) 毛细血管的显著输液缺陷和血管密度降低,在SCP中通常更明显.
- 像斑点血管密度这样的OCTA参数与视觉敏度相关,表明预后值;周围毛囊区域也显示密度降低.
结论:
- 急性RAO呈现微血管缺血变化,可通过OCTA轻松检测.
- OCTA已成为RAO诊断,监测和预后的重要非侵入性工具.
- 建议对OCTA协议和分析进行标准化,以加强RAO管理的临床应用.
相关概念视频
Glaucoma: Overview
1.7K
Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
1.7K
Open Angle Glaucoma: Treatment
1.1K
In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...
Drugs such as carbonic anhydrase inhibitors, α2- and...
1.1K
Angle Closure Glaucoma: Treatment
1.7K
Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
1.7K
Imaging Studies for Cardiovascular System V: CT
673
Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
673
Imaging Studies VII: Vascular Imaging
568
DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
568

