玻璃切除术输液管中的层状流是潜在有害的吗?
Tommaso Rossi1, Giorgio Querzoli2, Pier Giuseppe Ledda2
1IRCCS - Fondazione Bietti ONLUS - Roma, Italy.
Translational vision science & technology
|November 19, 2025
概括
玻璃切除术输液小可以在视网膜上产生显著的喷射流,压力和剪切应力. 这种流动在几分钟内增加了视网膜组织中的炎症和亡标志物.
科学领域:
- 眼科医生 眼科 眼科
- 生物医学工程 生物医学工程
- 流体动力学 流体动力学
背景情况:
- 玻璃切除手术使用输液小来维持眼内压力.
- 输液的流体动力学,特别是喷射流,尚未完全理解.
- 输注喷气冲击造成的潜在视网膜损伤需要进行调查.
研究的目的:
- 为了模拟25G玻璃切除术输液小管的喷射流.
- 为了计算输注喷气的视网膜压力和剪切应力.
- 为了评估猪视网膜对这种局部压力的生物反应.
主要方法:
- 计算流体动力学 (CFD) 用于模拟流体,压力和剪切应力.
- 活体猪眼睛通过25G管经过10毫升/分钟的流量进行了1或3分钟的试验.
- 测量了与炎症,氧化应激和亡相关的蛋白质的RNA转录.
主要成果:
- 10毫升/分钟的输液流量产生了1.33米/秒的喷气速度,在1毫米宽的区域中,压力增加超过2毫米升.
- 观察到p65,NF-κB,casp3,p53,iNOS,Keap1,Nrf2,GFAP,IL-1β和NOX4的RNA转录的显著增加,这些转录的结果是:
- 这些分子变化发生在流动启动后1到3分钟内.
结论:
- 25G玻璃切除术输液小产生高速喷射,对视网膜产生显著的冲击压力.
- 输液喷气可以破坏外科视图并产生气泡.
- 视网膜组织显示出快速的生物反应,在流暴露后不久,炎症,氧化应激和亡标志物增加.
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