Surgery – Truss – Pad
Patent
1980-11-03
1983-01-18
Howell, Kyle L.
Surgery
Truss
Pad
128719, 128725, A61B 508
Patent
active
043687407
ABSTRACT:
A physiologic analyzer is disclosed for continuous measurement of a subject's metabolic functions in which signals from ventilatory flow rate sensors and gas analyzers are processed to provide continuous measurement of the subject's ventilatory volume, carbon dioxide production, oxygen consumption, respiratory exchange ratio, and other metabolic functions of interest. An expiratory oxygen concentration sampler is enabled only when oxygen concentration deviates from the inspired value. When enabled, the sampler provides at its output a series of discrete signals proportional to successive instantaneous values of oxygen concentration in expired breath. A similar sampler is used in the processing of the carbon dioxide concentration signals. A respiratory cycle timer measures elapsed time between successive inspirations and provides a breath duration signal which is used for rate computations. Interpretation and analysis of test results is greatly facilitated by displaying all metabolic measurements as a function of oxygen consumption.
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Article from Journal of Applied Physiology, vol. 38, No. 5, May 1975, Entitled Breath-by-Breath Analysis of Ventilation and Pulmonary Gas Exchange by Digital Computer.
Acta Physiologica Scandinavica Supplementum 415, from the Departments of Aviation and Naval Medicine, entitled Dynamics of Pulmonary Gas Exchange and Heart Rate Changes at Start and End of Exercise, by Linnarsson.
Chickering Robert B.
Grunewald Glen R.
Hanley John C.
Howell Kyle L.
Warren Manfred M.
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