초록 ▼

A cardiopulmonary exercise system for real-time, breath-by-breath acquisition, analysis, display and printing of an individual\s physiologic parameters. A microprocessor based waveform analyzer receives inputs from a CO2 analyzer, an ECG monitor, an O2 analyzer, and a pneumotachograph, and, optional

A cardiopulmonary exercise system for real-time, breath-by-breath acquisition, analysis, display and printing of an individual\s physiologic parameters. A microprocessor based waveform analyzer receives inputs from a CO2 analyzer, an ECG monitor, an O2 analyzer, and a pneumotachograph, and, optionally, can also connect a cycle ergometer, a treadmill, a cardiac stress system, and an ear oximeter. The waveform analyzer provides output data to a host central processor unit to which a CRT display, a graphics copier or hard-copy printer may be connected for providing medical data for assessment of an individual\s heart and lungs, on a real-time basis whereby the level of fitness or underlying organic defects which may effect the cardiopulmonary system can be determined. The pneumotachograph, CO2 analyzer and O2 analyzer and ECG monitor provide analog signals representing flow, CO2 and O2 levels in expired air as well as heart rate. The waveform analyzer, under control of its dedicated microprocessor, performs an A/D conversion with the microprocessor also being used to calculate the tidal volume (VT), minute ventilation (VE), breathing frequency (fB), cardiac frequency (fC), inspiratory time (TI) and total time (TTOT) of last breath, fraction of CO2 in inspired gas (FICO2) and fraction of O2 in inspired gas (FIO2), peak CO2 and O2 (FETCO2 and FETO2), and expired volumes of CO2 and O2 (VCO2 and VO2) breath-by-breath. The system of the preferred embodiment analyzes the individual\s expirate at a sample rate of one hundred samples per second per channel with twelve bit resolution.

대표청구항 ▼

A cardiopulmonary performance testing and display system comprising in combination: (a) a mouthpiece member adapted for placement in a subject\s mouth, said mouthpiece member including means for generating a first analog electrical signal proportional to inspiratory and expiratory gas flow by said s

A cardiopulmonary performance testing and display system comprising in combination: (a) a mouthpiece member adapted for placement in a subject\s mouth, said mouthpiece member including means for generating a first analog electrical signal proportional to inspiratory and expiratory gas flow by said subject; (b) first gas analyzing means coupled to said mouthpiece member for producing a second analog electrical signal proportional to the level of carbon dioxide in said expiratory gas flow; (c) second gas analyzing means coupled to said mouthpiece member for producing a third analog electrical signal proportional to the level of oxygen in said expiratory gas flow; (d) waveform analyzer means including (1) a first computer programmed to perform arithmetic operations in accordance with a stored program of instructions; (2) means controlled by said computer means and connected to the first-named means, and said first and second gas analyzer means for sampling said first, second and third analog electrical signals in a predetermined sequence and converting said first, second and third analog electrical signals into digital quantities representative of said analog electrical signals during the sampling interval of each; (3) means in said first computer for at least temporarily storing said digital quantities as operands for said arithmetic operations; (e) means for displaying the results of said arithmetic operations; (f) second computer means remote from said first microprocessor means connected in a controlling relationship to said means for displaying; and (g) means for transmitting said results of said arithmetic operations from said first computer means to said second computer means.