光学一致性断层扫描血管扫描血管密度在健康人群,青光眼疑似眼睛和青光眼睛
Umesh Belbase1, Indra Man Maharjan2, Anup Subedi1
1Department of Optometry, Himalaya Eye Hospital, Gharipatan, Pokhara, Nepal.
Journal of current ophthalmology
|November 18, 2024
概括
光学连贯断层扫描血管造影 (OCTA) 显示,青光眼患者的视网膜血管密度降低,类似于视野测试的准确性. 这些OCTA测量可能表明,在初级开角绿内障 (POAG) 中,组织受损.
科学领域:
- 眼科医生 眼科 眼科
- 医疗成像医学成像
- 玻璃眼研究研究 玻璃眼研究
背景情况:
- 玻璃眼是导致不可逆转失明的主要原因.
- 早期发现和监测青光眼对于保护视力至关重要.
- 光学连贯断层扫描血管造影 (OCTA) 提供了一种非侵入性的方法来可视化视网膜血管结构.
研究的目的:
- 为了比较通过OCTA获得的视网膜血管测量在健康个体,青光眼疑似患者 (GS) 和初级开角青光眼 (POAG) 患者中.
- 评估OCTA衍生的容器密度与标准视野测试之间的相关性.
主要方法:
- 在38名健康,38名GS和38名POAG参与者的114只眼睛上进行了OCTA成像.
- 视网膜血管系统被量化为血管密度 (%),包括整个血管密度 (wVD) 和周周血管密度 (ppVD).
- 全球视野指数 (平均偏差和模式标准偏差) 与船舶密度测量相关.
主要成果:
- 与GS和健康眼睛相比,POAG眼睛的平均wVD和ppVD显着较低 (P < 0.001).
- 在容器密度 (wVD,ppVD) 和视野指数 (MD,PSD) 之间观察到显著的线性关系 (P < 0.001).
- OCTA血管密度显示诊断准确度与视野测试相提并论,用于区分健康眼睛和青光眼.
结论:
- 在POAG患者中,OCTA衍生的血管密度测量显著减少.
- OCTA血管密度显示了作为青光眼的诊断工具的潜力,其准确性与视觉场测试相似.
- 这些发现表明,OCTA测量反映了与眼病原发症相关的微血管变化.
相关概念视频
01:25Glaucoma: Overview
508
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...
508
01:27Open Angle Glaucoma: Treatment
393
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...
393
01:28Angle Closure Glaucoma: Treatment
438
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...
438