Abstract
The effects of the physical parameters of the parenchyma and airways on the temporal relationships between the volume flow rate and the linear velocity of airflow in the trachea during coughing were studied using a mathematical model. It was shown that the relationship between the volume flow rate and the duration of the act of conghing can be used for assessment of inertial and viscous properties of the posterior wall of the trachea and for assessment of the parameter characterizing the nonlinearity of the intrapulmonary airway resistance. Computations indicated that the linear air velocity in the trachea and, therefore, the cough efficiency depend weakly on the physical properties of the posterior wall of the trachea and lung parenchyma.
Similar content being viewed by others
REFERENCES
King, N.A., Brock, G., and Lundell, C., Clearance of Mucus by Simulated Cough, J. Appl. Physiol., 1985, vol. 58, no. 6, p. 1776.
Langlangs, I., The Dynamics of Cough in Health and in Chronic Bronchitis, Thorax, 1967, vol. 22, p. 88.
Scherer, P.W. and Burtz, L., Fluid Mechanical Experiments Relevant to Coughing, J. Biomechanics, 1997, vol. 11, p. 183.
Scherer, P.W., Mucus Transport by Cough, Chest, 1981, vol. 80, no. 6, Suppl., p. 830.
Lyubimov, G.A., The Mechanics of Cough, Fiziol. Chel., 1999, vol. 25, no. 5, p. 81.
Lyubimov, G.A. and Skobeleva, I.M., Mathematical Model of Forced Expiration, Izv. Akad. Nauk SSSR., Mekh. Zhidk. Gaza, 1991, no. 4, p. 3.
Lyubimov, G.A. and Skobeleva, I.M., A Mathematical Model Describing the Act of Coughing in a Homogenous Lung, Izv. Akad. Nauk SSSR., Mekh. Zhidk. Gaza, 2000, no. 6, p. 3.
Kuznetsova, V.K. and Lyubimov, G.A., Assessment of the Physical Properties of Human Lungs Based on Analysis of the Airway Resistance, Fiziol. Chel., 1985, vol. 11, p. 55.
Lyubimov, G.A., Modeling the Development of the Breathing Muscles Force during Forced Expiration, Fiziol. Chel., 1991, vol. 17, no. 1, p. 104.
Rukovodstvo po klinicheskoi fiziologii dykhaniya (A Manual on Clinical Physiology of Breathing), Shik, L.L. and Kanaev, N.N., Eds., Leningrad: Meditsina, 1980.
Ross, B.B., Gramiak, R., and Rahn, H., Physical Dynamics of the Cough Mechanism, J. Appl. Physiol., 1955, vol. 8, p. 264.
Kuznetsova, V.K., Lyubimov, G.A., and Kameneva, M.Yu., Dynamics of the Resistance to the Air Flow at the Phase of Its Increase during Forced Expiration at Various Disturbances of the Breathing Dynamics, Pulmonologiya, 1995, no. 4, p. 36.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Lyubimov, G.A., Skobeleva, I.M. Effects of Physical Properties of the Lung Parenchyma and Airways on Cough Efficiency. Human Physiology 27, 447–453 (2001). https://doi.org/10.1023/A:1010914920073
Issue Date:
DOI: https://doi.org/10.1023/A:1010914920073