Method for continuous measurement of flux of gases in the lungs during breathing
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United States of America Patent
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Mar 29, 2011
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app pub date -
Mar 21, 2003
filing date -
Mar 28, 2002
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Abstract
A method of calculating the flux of any gas (x) in a CBC circuit for a ventilated or a spontaneous breathing subject, for example said gas(x) being; a) an anesthetic such as but limited to; i)N.sub.2O; ii) sevoflurane; iii) isoflurane; iv) halothane; v) desflurame; or the like b) Oxygen; c) Carbon dioxide; or the like utilizing the following relationships; Flux of gas(x)=SGF (F.sub.SX-F.sub.EX) wherein SGF=Source of gas flow into the breathing circuit (CBC circuit) in liters/minute as read from the gas flow meter as set by the anesthesiologist; F.sub.SX=Fractional concentration of gas X in the source gas (which is set by the anesthesiologist); F.sub.EX=Fractional concentration of gas X in the end expired gas as determined by a portable gas analyzer, or the like.
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