Pulmonary Ventilation Measured from Body Surface Movements

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Science  09 Jun 1967:
Vol. 156, Issue 3780, pp. 1383-1384
DOI: 10.1126/science.156.3780.1383


Changes in anteroposterior diameters of the rib cage and abdomen are sensed with magnetometers and summed to give outputs which are very nearly linearly related to changes in lung volume. The volume events of breathing can be measured without recourse to a mouthpiece or face mask, other than for calibration, and with minimal encumbrance to the subject.