Abstract
Piezoelectric film-based respiratory belts are described and tested. To the extent that a two-degree of freedom model consisting of rib cage and abdominal motion is able to assist in quantifying ventilation, the piezoelectric belts can monitor flow in a manner analogous to the monitoring of volume with two magnetometer pairs or two respiratory inductive plethysmograph belts. The piezoelectric belts are shown to measure flow linearly when compared with a screen pneumotachometer to a flow of at least 2.6 L/s. There is no phase shift between the peak flow of belts and the pneumotachometer up to a frequency of at least 9.2 Hz. During normal ventilation, 68 and 95% of the peak flows measured with the belts fall within ±10 and 20%, respectively, of the flows measured with a screen pneumotachometer.
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Askanazi J, Silvcrbcrg PA, Foster RJ, et al. Effects of respiratory apparatus on breathing pattern. J Appl Physiol 1980;48:577–580
Konno K, Mead J. Measurement of the separate volume changes of rib cage and abdomen during breathing. J Appl Physiol 1967;22:407–422
Mead J, Peterson N, Grimby G, Mead J. Pulmonary ventilation measured from body surface movements. Science 1967;156:1383–1384
Cohn MA, Rao ASV, Broudy M, et al. The respiratory inductive plethysmograph: a new non-invasive monitor of respiration. Bull Eur Physiopathol Respir 1982;18:643–658
Zimmerman PV, Connellan SJ, Middleton HC, et al. Postural changes in ribcage and abdominal volume-motion coefficients and their effect on the calibration of a respiratory indicative plethysmograph. Am Rev Respir Dis 1983;127:209–214
Smith JC, and Mead J. Three degree of freedom description of movement of the human chest wall. J Appl Physiol 1986;60:928–934
East KA, East TD, Mathews VJ, Waterfall BT. Computerized artifact detection for ventilatory inductance plethysmographic apnea monitors. J Clin Monit 1989; 5:170–176
Pennock BE, Cox CP, Rogers RM, et al. A noninvasive technique for measurement of change in specific airway resistance. J Appl Physiol 1979;46:399–406
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Pennock, B.E. Rib cage and abdominal piezoelectric film belts to measure ventilatory airflow. J Clin Monitor Comput 6, 276–283 (1990). https://doi.org/10.1007/BF02842487
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DOI: https://doi.org/10.1007/BF02842487