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头向下倾斜对视神经外直径在健康人群中的影响
Jessica J Ustick1, Laura P Pardon1, Pratik Chettry1
1College of Optometry, University of Houston, Houston, Texas, USA.
概括
头向下倾斜 (HDT) 在健康成年人中显著增加视神经外直径 (ONSD). 这种ONSD扩大发生在采用HDT姿势后一小时内,并保持稳定长达三小时.
科学领域:
- 眼科医生 眼科 眼科
- 身体生理学 身体生理学
- 医疗成像医学成像
背景情况:
- 已知内压力 (ICP) 随着头向下倾斜 (HDT) 身体姿势而增加.
- 视神经外直径 (ONSD) 是ICP的一个非侵入性指标.
- 了解ONSD对HDT的反应对于评估潜在的神经变化至关重要.
研究的目的:
- 评估头向下倾斜 (HDT) 对视神经外直径 (ONSD) 在健康成年人的影响.
- 为了确定HDT姿势是否影响ONSD测量.
- 为了确定持续的HTT期间ONSD变化的时间进程.
主要方法:
- 26名健康的成年人接受了超声波测量,以测量在坐着和6° HDT两种位置的ONSD.
- 基线ONSD测量是在坐着的位置进行的.
- 在坐姿和HDT姿势中,每小时间隔 (11:00, 12:00, 15:00) 测量ONSD.
主要成果:
- 在坐着的位置,ONSD随着时间的推移而保持稳定.
- 与基线测量相比,头向下倾斜 (HDT) 显著增加了水平和垂直的ONSD.
- 在HDT期间ONSD的增加在12:00时明显,并在15:00时持续,在这些时间点之间没有进一步的显著变化.
结论:
- 视神经外直径 (ONSD) 在从坐着的位置过渡到向下倾斜 (HDT) 位置时会增加.
- 在HDT姿势下,ONSD在3个小时内保持升高和稳定.
- 这些发现表明,HTT诱导了ICP的持续增长,这体现在ONSD扩大.
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