正常和玻璃眼的人类水性流出通路的细分生物力学
Alireza Karimi1, Shanjida Khan1, Reza Razaghi2
1Department of Ophthalmology, Casey Eye Institute, Oregon Health & Science University, Portland, OR, USA; Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR, USA.
Acta biomaterialia
|November 9, 2023
概括
玻璃眼硬化了眼睛的水性幽默流出通道,特别是在流量较低的区域. 这项研究揭示了状网状组织,状状结缔组织和施莱姆运河组织的关键生物机械差异.
科学领域:
- 眼科医生 眼科 眼科
- 生物力学 生物力学
- 医疗成像医学成像
背景情况:
- 常规的水性外流通道,包括状网 (TM),并状连接组织 (JCT) 和施莱姆通道 (SC) 内皮,对于调节眼内压力 (IOP) 至关重要.
- 功能障碍的水性幽默流出是绿眼病的标志,是不可逆转失明的主要原因.
研究的目的:
- 为了研究TM/JCT/SC复合物的生物力学特性,在正常和眼人类捐赠眼睛的低流量 (LF) 和高流量 (HF) 区域.
- 为了将这些生物机械变化与改变的水性幽默动态和玻璃眼中IOP调节相关联.
主要方法:
- 单轴拉伸测试TM/JCT/SC组织从正常和眼睛的眼睛.
- 在施莱姆运河加压过程中使用光学连贯性断层扫描进行现场动态运动分析.
- 开发超粘弹性和流体结构相互作用 (FSI) 模型以模拟组织-流体相互作用.
- 粒子跟踪速度计用于分析水流动模式.
主要成果:
- 与正常眼睛相比,青光眼的TM/JCT/SC组织显著更为硬,在LF区域的弹性模块是3.5倍高,在HF区域是1.5倍高.
- 有限元分析显示,在眼TM,JCT和SC组织中,剪切模块较大.
- 在正常眼睛和眼眼中,LF区域表现出比HF区域更硬的生物力学反应.
- FSI模型对组织应变和水性幽默速度的预测与实验数据密切匹配.
结论:
- 玻璃眼与传统的水性外流通路组织的硬度增加有关.
- 区域生物力学差异 (LF与HF) 存在于外流通路内,并且在玻璃眼中发生了变化.
- 这些生物力学变化可能会导致水性幽默流出受损,并增加玻璃眼的内压.
- 综合的实验和计算方法提供了对眼生物力学基础的强有力的理解.
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