Abstract
The authors have previously described an automated system for measuring total respiratory resistance. The technique used by this system involves a transient, externally applied increase in resistance to breathing. The utility of this technique is limited by a number of assumptions and to free it from the constraints imposed by one of these assumptions a new method for analysing the data was developed. The paper describes the new method of analysis and presents data comparing the resulting Rrss with those computed using the old method.
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Bates, J. H. T., Sly, P. D. andOkubo, S. (1987) General method for describing and extrapolating monotonic transients and its application to respiratory mechanics.Med. & Biol. Eng. & Comput.,25, 131–135.
Chiang, S. T., Tsau, D., Green, J., Wang, S. S., Wang, W. F. andYang, Y. C. (1987) Online computerized system for determining total respiratory resistance.J. Biomed. Eng. Soc., Rep. of China,7, 157–164.
Chiang, S. T., Green, J. andKao, Y. C. (1988) Determination of total respiratory resistance in health and disease by added external resistance.Chest,93, 537–540.
Clements, J. A., Sharp, J. T., Johnson, R. P. andElam, J. O. (1959) Estimation of pulmonary resistance by repetitive interruption of airflow.J. Clin. Invest.,38, 1262–1270.
Green, J., Chiang, S. T., Wang, W. F., Yang, Y. C. andKao, Y. C. (1988) Volume and pressure during transient added resistance.Respirat. Physiol.,74, 239–251.
Jackson, A. C., Milhorn, H. T. andNorman, J. R. (1974) A reevaluation of the interrupter technique for airway resistance measurement.J. Appl. Physiol.,36, 264–268.
Mead, J. andAgostoni, E. (1964) Dynamics of breathing. InHandbook of physiology, Section 3: Respiration. Vol. 1.Fenn, W. O. andRahn, H. (Eds.), American Physiological Society, Washington DC, 411–427.
Morris, M. J. andLane, D. J. (1981) Tidal expiratory flow patterns in airflow obstruction.Thorax,36, 135–142.
Quanjer, P. H. (1971) Plethysmographic evaluation of airway obstruction. Dissertation, Groningen, 72.
Sachs, L. (1984)Applied statistics, a handbook of techniques, 2nd edn. Springer-Verlag, New York.
Shaw, C. F., Chiang, S. T., Hsieh, Y. C., Milic-Emili, J. andLenfant, C. (1983) A new method for measurement of respiratory resistance.J. Appl. Physiol.,54, 594–597.
Shephard, R. J. (1963) Mechanical characteristics of the human airway in relation to use of the interrupter valve.Clin. Sci.,25, 263–280.
Silverman, L., Lee, G., Plotkin, T., Amory, L. andYancey, A. R. (1945) Fundamental factors in the design of protective respiratory equipment. Inspiratory and expiratory air flow measurements on human subjects with and without resistance at several work rates. Report 5732, Office Sci. Res. Develop., 1st Aug. 1945.
Sobol, B. J. (1970) A simple, rapid technique for assessing airway resistance during quiet breathing.Am. Rev. Respirat. Dis.,102, 970–974.
Sobol, B. J. (1973) A method of assuring maximal flow in forced expiratory manoeuvers.Chest,64, 472–475.
Swanberg, J. W. andKampe, G. (1979) Extension of Sobol method in airways resistance measurement. Paper #18.2 inProc. 32nd Ann. Conf. on Eng. in Med. & Biol.,21, 154.
Yamashiro, S. M. andGrodins, F. S. (1971) Optimal regulation of respiratory airflow.J. Appl. Physiol.,30, 597–602.
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Green, J., Chiang, S.T. & Yang, Y.C. Improved computation of respiratory resistance as measured by transiently increased resistance. Med. Biol. Eng. Comput. 28, 50–53 (1990). https://doi.org/10.1007/BF02441677
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DOI: https://doi.org/10.1007/BF02441677