夜间缺氧和与年龄相关的黄斑变性
Attiqa Chaudhary1,2, Carla J Abbott1,2, Zhichao Wu1,2
1Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, East Melbourne, Victoria, Australia.
Clinical & experimental ophthalmology
|August 1, 2024
概括
通过氧气脱度指数 (ODI) 表示的夜间缺氧与新血管与年龄相关的黄斑变性 (nAMD) 有关. 这一发现表明夜间缺氧可能是nAMD的一个显著的,可修改的风险因素.
科学领域:
- 眼科医生 眼科 眼科
- 睡眠医学 睡眠医学
- 心血管研究研究心血管研究
背景情况:
- 夜间缺氧在与年龄相关的黄斑变性 (AMD) 风险较高的人群中很普遍,并且诊断不足.
- 该研究调查了夜间缺氧和AMD之间的潜在关联,包括其严重程度和网状伪 (RPD) 的存在.
研究的目的:
- 确定夜间缺氧是否与AMD的存在和严重程度有关.
- 探索夜间缺氧和高风险的AMD亚表型,RPD之间的联系.
主要方法:
- 一项涉及50岁以上的患有AMD的参与者或正常对照者的横截面研究,不包括因阻塞性睡眠呼吸暂停 (OSA) 接受治疗的人.
- 一夜间的家庭脉冲氧度测试用于记录氧和,多式成像分类AMD.
- 阻塞性睡眠呼吸暂停 (OSA) 使用氧气不和指数 (ODI) 进行分类:轻度 (5-15) 和中度至重度 (>15).
主要成果:
- 在225名参与者中,76%患有AMD,42%患有共存RPD.
- 中度至重度的OSA显著与新血管AMD (nAMD) 的几率增加有关 (OR=6.35,p=0.032).
- 在轻度或中度至重度的OSA和整体AMD,带RPD的AMD,早期/中期AMD或地理缩 (GA) 之间没有发现显著的关联.
结论:
- 通过ODI测量的夜间缺氧与nAMD有关.
- 夜间缺氧代表了一个潜在的未被认可和可修改的nAMD风险因素.
相关概念视频
Photoreceptors and Visual Pathways
6.0K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
6.0K
Aging
41
Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
41
Hypoxia
992
Hypoxia is a medical condition characterized by an inadequate oxygen supply to body tissues. It typically manifests as a bluish discoloration of the skin and mucosae, especially in fair-skinned individuals, when hemoglobin (Hb) saturation drops below 75%.
Types of Hypoxia
There are four primary types of hypoxia, each resulting from a different cause:
1. Anemic hypoxia: This type occurs due to insufficient oxygen delivery caused by a lack of red blood cells (RBCs) or RBCs with abnormal or...
Types of Hypoxia
There are four primary types of hypoxia, each resulting from a different cause:
1. Anemic hypoxia: This type occurs due to insufficient oxygen delivery caused by a lack of red blood cells (RBCs) or RBCs with abnormal or...
992
Bone Disorders
3.5K
Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
3.5K


