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相关概念视频

Atelectasis II: Pathophysiology01:10

Atelectasis II: Pathophysiology

Atelectasis develops when alveoli lose their air and collapse inward. Because lung tissue is naturally elastic, these air sacs shrink rather than remaining open. Collapsed alveoli are no longer ventilated, reducing their role in gas exchange. Blood flow may continue in these regions, creating a ventilation–perfusion mismatch. Clinical findings include decreased breath sounds, dullness to percussion, reduced chest expansion, and decreased tactile fremitus as sound transmission through collapsed...
Acute Respiratory Failure-II01:21

Acute Respiratory Failure-II

Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:

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Preparation and Structural Evaluation of Epithelial Cell Monolayers in a Physiologically Sized Microfluidic Culture Device
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使用肺内皮微生理系统建模败血症相关的ARDS.

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    概括
    此摘要是机器生成的。

    这项研究使用肺内皮微生理系统 (MPS) 来分析败血症患者的血. 该MPS揭示了内皮通透性和炎症标记的增加,这表明了研究急性呼吸困扰综合征 (ARDS) 的新方法.

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    科学领域:

    • 生物医学工程 生物医学工程
    • 关键护理医学 关键护理医学
    • 血管生物学 血管生物学

    背景情况:

    • 来自非肺源的急性呼吸窘迫综合征 (ARDS) 涉及内皮激活,难以在重症监护中评估.
    • 临床前模型往往无法转化为人类疗法,因为在炎症反应中存在物种间的差异.
    • 微生理系统 (MPS) 对人类反应提供了更高的忠诚度,并且比传统文化更好地预测药物的疗效.

    研究的目的:

    • 调整肺内皮MPS以评估败血症患者血对内皮功能的影响.
    • 使用MPS评估内皮透性,粘附分子表达和炎症性细胞因子产生.

    主要方法:

    • 使用基于LumeNEXT平台的肺内皮MPS.
    • 发光物被用来自重症败血症患者和健康捐赠者的血进行化.
    • 测量了内皮通透性,ICAM-1表达和细胞因子水平 (IL-6,IL-18,sVEGF-R1).这些都被测量了.

    主要成果:

    • 败血症等离子体诱导了光层收缩,细胞覆盖的丧失和缺陷.
    • 显著增加的内皮通透性和ICAM-1表达被观察到与败血症等离子体.
    • 在败血症血中发现IL-6,IL-18和可溶性VEGF-R1度升高.

    结论:

    • 肺内皮MPS有效地模拟了败血症引起的内皮功能障碍.
    • 这种MPS方法可能允许详细调查驱动ARDS在败血症患者的机制.
    • 它为了解严重疾病中的内皮细胞反应提供了一个有前途的平台.