Surgery – Diagnostic testing – Respiratory
Patent
1998-09-09
2000-05-09
Hindenburg, Max
Surgery
Diagnostic testing
Respiratory
600538, 600531, A61B 508
Patent
active
060597321
ABSTRACT:
A method of calculating the carbon dioxide elimination of a patient that includes counteracting any inaccuracy or inconsistency in respiratory flow measurements that may be caused by "noise", such as is attributable to respiratory circuit leaks, signal drift, a non-unity respiratory quotient, or another respiratory flow error-inducing factor. The method includes monitoring the respiratory flow and carbon dioxide of the patient during at least a portion of both inspiration and expiration; calculating an inspiratory tidal volume, an inspiratory volume averaged carbon dioxide fraction, an expiratory tidal volume, and an expiratory volume averaged carbon dioxide fraction; and selecting a tidal volume to replace at least one of the inspiratory tidal volume and the expiratory tidal volume. The carbon dioxide elimination of the patient is then calculated with the select tidal volume, the inspiratory volume averaged carbon dioxide fraction, and the expiratory volume averaged carbon dioxide fraction.
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Haryadi Dinesh G.
Jaffe Michael B.
Kuck Kai
Orr Joseph A.
Hindenburg Max
Natnithithadha N
NTC Technology Inc.
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