小型猪气道树模型中产生的压力损失和声音

M. K. Azad, Amirtahà Taebi, Joseph H Mansy, H. Mansy
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引用次数: 0

摘要

背景:肺听诊是诊断各种呼吸系统疾病的常用工具。以前的研究已经记录了人类肺部声音的许多细节。然而,关于动物气道内声音产生和压力损失的信息很少。由于动物气道的形态可能与人类有很大的不同,因此动物气道内的肺音和压力损失特征可能不同。目的:本研究的目的是研究基于物理测量提取的几何细节的微型猪气道树模型的气管声和静压损失。方法:在本研究中,记录了在不同流量的微型猪气道树中测量的气管静压损失和声音产生。结果:结果表明,随着流量的增加,气管处的静压和录制声音的振幅增大。在流速为0.2-0.55 lit/s时,主导频率约为1840-1870 Hz。结论:在流量为0.20 ~ 0.55 lit/s范围内,所测声音的主导频率基本一致。需要进一步研究不同进口流量和脉动流条件下的声生成。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Pressure Loss and Sound Generated In a Miniature Pig Airway Tree Model
Background: Pulmonary auscultation is a common tool for diagnosing various respiratory diseases. Previous studies have documented many details of pulmonary sounds in humans. However, information on sound generation and pressure loss inside animal airways is scarce. Since the morphology of animal airways can be significantly different from human, the characteristics of pulmonary sounds and pressure loss inside animal airways can be different. Objective: The objective of this study is to investigate the sound and static pressure loss measured at the trachea of a miniature pig airway tree model based on the geometric details extracted from physical measurements. Methods: In the current study, static pressure loss and sound generation measured in the trachea was documented at different flow rates of a miniature pig airway tree. Results: Results showed that the static pressure and the amplitude of the recorded sound at the trachea increased as the flow rate increased. The dominant frequency was found to be around 1840-1870 Hz for flow rates of 0.2-0.55 lit/s. Conclusion: The results suggested that the dominant frequency of the measured sounds remained similar for flow rates from 0.20 to 0.55 lit/s. Further investigation is needed to study sound generation under different inlet flow and pulsatile flow conditions.
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