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产后胎儿头部压缩在新生儿视网膜出血中的作用

Matthew R Lam¹, Christopher D Yang², Jose A Colmenarez³

¹Creighton University School of Medicine, Phoenix, Arizona.

Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and Strabismus

|September 18, 2023

概括

计算模拟显示,阴道分娩期间内压力 (ICP) 的增加会对新生儿造成重大压力.

科学领域:

眼科医生眼科眼科
生物医学工程生物医学工程
新生儿医学新生儿医学

背景情况:

新生儿视网膜出血很常见,但其机制尚不清楚.
了解与出生相关的眼睛创伤的生物力学对于预防至关重要.

研究的目的:

在阴道分娩期间以计算方式模拟新生儿眼睛和轨道中的生物力学事件.
为了研究母亲的收缩,内压力和视网膜压力之间的关系.

主要方法:

开发了新生儿眼睛,视神经外和轨道的有限元模型.
该模型在阴道分娩期间受到模拟增加内压力 (ICP) 的力量.
测量眼内压力 (IOP),视神经外压力和组织压力.

主要成果:

收缩期间增加的ICP增加了轨道内和视神经外围压力.
在视网膜中观察到显著的压力,特别是在光盘附近.
膜应力也增加,达到12.76kPa的峰值.

结论:

在阴道分娩过程中,阴道内压力升高会引起视网膜压力和潜在的血管损伤.
视神经外围压力增加可能导致静脉外流阻塞和出血.
后视网膜出血倾向与光盘附近的压力积累有关.

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