在16个非人类灵长类动物的气道模型中,吸入暴露和颗粒沉积使用计算流体-颗粒动力学来进行全米推断
Yuichiro Suda1, Kazuki Kuga2, Nguyen Dang Khoa2
1Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Fukuoka, 816-8580, Japan.
Computer methods and programs in biomedicine
|March 14, 2026
概括
在身上进行的计算流体粒子动力学 (CFPD) 模拟显示了吸入暴露的显著个体间变异性. 纳入年龄和形态学可以改善从子到人类的数据推断,以便更好地进行吸入研究.
科学领域:
- 吸入毒理学和生物物理学
- 对比解剖学和生理学的比较.
- 计算机建模和模拟.
背景情况:
- 非人类灵长类动物是有价值的人类替代品,但它们的使用受到伦理和实际问题的限制.
- 计算流体粒子动力学 (CFPD) 为吸入研究提供了一个替代方案,但需要强大的验证.
- 之前的CFPD研究经常使用小样本大小,限制了研究结果的概括性.
研究的目的:
- 用CFPD分析大量的吸入暴露.
- 通过全米比较来确定人类和子吸入暴露之间的关系.
- 为了提高使用灵长类动物模型进行人类吸入暴露评估的可靠性.
主要方法:
- 从CT数据重建了16种的上呼吸道模型.
- 稳定状态空气流和粒子运输模拟使用高分辨率,独立于电网的网格.
- 通过拉格朗的粒子追踪对11个微粒大小的粒子吸收和沉积效率的评估.
主要成果:
- 气道几何学显著影响空气流阻力,速度和壁切应力,导致粒子沉积的个体间变化.
- 在和儿科人类气道模型之间观察到形态相似之处.
- 通过修改的斯托克斯数来使沉积效率正常化,减少了变化,并改善了预测建模.
结论:
- 年龄和形态是准确的吸入数据的跨物种推断的关键因素.
- 对的CFPD分析为更可靠的吸入暴露评估提供了基础.
- 这项研究验证并增强了从子到人类的吸入数据的推断.
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