鼻腔气流的计算分析及其通过鼻腔扩张器的改变
Kyun Bum Lee1, Jordi Ventosa-Molina2, Jochen Fröhlich1
1Chair for Fluid Dynamics, Technische Universität Dresden, Dresden, Germany.
Computers in biology and medicine
|June 25, 2024
概括
鼻腔扩张器提供有限的空气流改善,在某些情况下可以加剧阻塞. 计算流体动力学 (CFD) 模拟显示,在理想条件下,穿透率增加了24%,但在设计之外的场景中,阻力增加了62%.
科学领域:
- 生物力学 生物力学
- 医疗工程 医疗工程
- 呼吸系统生理学 呼吸系统生理学
背景情况:
- 鼻腔气流阻塞与各种健康问题有关,如打和空调受损.
- 鼻扩展器是流行的非手术干预措施,但由于主观评估,它们的有效性仍在争论中.
- 需要客观的评估方法来准确确定鼻扩展器的疗效.
研究的目的:
- 用计算流体动力学 (CFD) 客观评估鼻腔扩张器对鼻腔气流和空调的影响.
- 分析空气流通路径,摩擦和热湿度交换在一个现实的鼻子模型与隔膜偏差.
- 评估标准鼻腔扩张器的预期 (设计) 和非预期 (非设计) 影响.
主要方法:
- 利用计算流体动力学 (CFD) 模拟来模拟人类鼻腔内的空气流.
- 评估了关键参数,包括空气流通率,摩擦水平,热量和水流.
- 模拟使用标准鼻扩张器在鼻模型上,由于隔膜偏差而导致不对称的鼻孔.
主要成果:
- 在预期的用例 (设计情况) 中,鼻孔透度增加了24%,但摩擦和空调的整体改善是有限的.
- 在设计之外的场景中,扩展器在一个鼻孔中引起了阻塞,鼻腔抵抗增加了62%.
- CFD分析提供了关于流动动态,温度和湿度分布的详细见解,突出了扩展器的各种影响.
结论:
- 在理想的条件下,标准鼻腔扩展器在改善鼻腔气流和空调方面可能只能提供适度的好处.
- 在非理想的鼻腔解剖学 (例如,隔膜偏差) 中使用标准扩展器可以导致显著的鼻腔阻塞和增加抵抗.
- 客观的CFD分析对于了解鼻扩展器的复杂影响和识别潜在的不良结果至关重要.
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