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一个微型人性化芯片通风器,用于检查机械通风的有害影响
Basia Gabela-Zuniga1,2, Vasudha C Shukla1,2, Christopher Bobba1,2
1Department of Biomedical Engineering, The Ohio State University, Columbus, Ohio, USA. ghadiali.1@osu.edu.
Lab on a chip
|August 20, 2024
概括
一个新的呼吸器芯片模型揭示了在通风过程中不同的机械力如何导致肺损伤. 气道重新开放的力量,而不是过度拉伸,是障碍物损伤的主要原因,并在呼吸机引起的肺损伤 (VILI) 中延迟恢复.
科学领域:
- 生物医学工程 生物医学工程
- 呼吸系统生理学 呼吸系统生理学
- 细胞力学 细胞力学
背景情况:
- 机械通风对于呼吸衰竭患者至关重要.
- 在机械通风过程中,肺部通风不均,可能导致呼吸器诱导的肺损伤 (VILI).
- 现有的肺芯片模型很难复制VILI的机制和恢复.
研究的目的:
- 开发一种新的人性化*体外*呼吸器芯片 (VOC) 模型.
- 模拟和分析导致VILI的独特机械力.
- 为了实时调查损伤性机械通风期间和之后的屏障完整性变化.
主要方法:
- 开发了一种新型的人性化*体外*呼吸机芯片 (VOC) 模型.
- 使用过体/内皮体电阻测量.
- 应用的单个和同时的机械力 (barotrauma,volutrauma,atelectrauma).
主要成果:
- 压力应力 (barotrauma) 并没有显著影响屏障完整性.
- 过度伸缩 (volutrauma) 降低了屏障完整性,并迅速恢复.
- 气道重新开放的力量 (atelectrauma) 导致了快速的屏障破坏和延迟的恢复.
- 综合体外伤和心电创伤显示,心电创伤是障碍破坏的主要驱动因素.
结论:
- 新的VOC系统准确地模拟了与VILI相关的力及其对肺壁垒完整性的影响.
- 呼吸道重新开放时的表面张力是与VILI相关的屏障损伤的主要原因.
- 该模型可以实时监测VILI机制,并评估潜在的治疗方法.
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