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单通道系统以描述血液物种和血红素对流动诱导的血液溶解的影响

Sailahari V Ponnaluri¹, Moustafa Meki¹, Luke H Herbertson¹

¹Division of Applied Mechanics, Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Maryland, USA.

Artificial organs

|August 23, 2025

概括

这项研究开发了一种微喷嘴系统,以改进体外血液溶解测试. 结果显示血液溶解随流量和血位数的增加而增加,

科学领域:

生物医学工程
材料科学
流体动力学

背景情况:

在体外血液溶解测试对于血的发展至关重要.
目前的ASTM F1841标准测试参数由于血液种类,抗凝剂和制备方法的变化,可能会产生不一致的血液溶解结果.

研究的目的:

为了提高体外血液溶解测试的灵敏度.
研究血液物种和血红素 (HCT) 对流动诱导的血液溶解的影响.
开发一个标准化的微喷嘴测试系统,用于可重复的血液溶解评估.

主要方法:

使用压力驱动的单通微喷嘴系统,血液暴露时间短.
猪,牛,绵羊和人类的血液通过250和410μm喷嘴尖进行了35%的HCT测试.
测量了无血血红蛋白 (pfHb) 度以量化血解;进一步分析了不同水平的猪血 (25%, 35%, 45%).

主要成果:

微喷嘴系统表现出高重复性和可重复性,流量变化系数低 (<0.5%) 和pfHb水平低 (<16%).
在所有测试物种中,血液溶解与流量显著增加.
羊和牛的血液表现出最低的血液溶解,而人类的血液显示出最高的血液溶解;血液溶解也随着HCT的上升而非线性地增加.

结论:

开发的微喷嘴模型提供了一种敏感且可重复的方法来评估流动诱导的血液溶解.
这种系统可用于研究影响血液溶解的其他因素.
这些发现支持计算流体动力学 (CFD) 溶血模拟的进步.

关键词:

血红素机械血液溶解一次通行证其他物种

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相关概念视频

Blood Flow

Blood Flow

Blood is pumped by the heart into the aorta, the largest artery in the body, and then into increasingly smaller arteries, arterioles, and capillaries. The velocity of blood flow decreases with increased cross-sectional blood vessel area. As blood returns to the heart through venules and veins, its velocity increases. The movement of blood is encouraged by smooth muscle in the vessel walls, the movement of skeletal muscle surrounding the vessels, and one-way valves that prevent backflow.