PMID: 3745063Aug 1, 1986Paper

Speed of stress wave propagation in lung

Journal of Applied Physiology
R T YenG Butterman

Abstract

The speed of stress waves in the lung parenchyma was investigated to understand why, among all internal organs, the lung is the most easily injured when an animal is subjected to an impact loading. The speed of the sound is much less in the lung than that in other organs. To analyze the dynamic response of the lung to impact loading, it is necessary to know the speed of internal wave propagation. Excised lungs of the rabbit and the goat were impacted with water jet at dynamic pressure in the range of 7-35 kPa (1-5 psi) and surface velocity of 1-15 m/s. The stress wave was measured by pressure transducer. The distance between the point of impact and the sensor at another point on the far side of the lung and the transit time of the stress wave were measured. The wave speed in the goat lung was found to vary from 31.4 to 64.7 m/s when the transpulmonary pressure Pa-Ppl was varied from 0 to 20 cmH2O where Pa represents airway pressure and Ppl represents pleural pressure. In rabbit lung the wave speed varied from 16.5 to 36.9 m/s when Pa-Ppl was varied from 0 to 16 cmH2O. Using measured values of the bulk modulus, shear modulus, and density of the parenchyma, reasonable agreement between theoretical and experimental wave speeds wer...Continue Reading

Citations

Jul 21, 1999·Journal of Biomechanical Engineering·J J CriscoR D McGovern
Aug 19, 2015·Medical & Biological Engineering & Computing·Ying PengThomas J Royston
Oct 23, 2002·Journal of Applied Physiology·R PaciejR Murphy
Aug 26, 2010·Biomechanics and Modeling in Mechanobiology·F Scott GayzikJoel D Stitzel
Jul 1, 2020·Biomechanics and Modeling in Mechanobiology·J D Clayton
May 6, 2008·Proceedings of the National Academy of Sciences of the United States of America·Sungsoo NaNing Wang
Oct 4, 2014·Journal of Vibration and Acoustics·Zoujun DaiThomas J Royston

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