Method for calibrating a carbon dioxide monitor

Details Method for calibrating a carbon dioxide monitor Method for calibrating a carbon dioxide monitor

1993-12-23

1995-02-07

Kamm, William E.

Surgery

Truss

Pad

128725, 73 233, A61B 508

Patent

active

053868331

ABSTRACT:
An apparatus periodically measures the carbon dioxide content of the breath of a medical patient. The need to recalibrate the apparatus is determined by comparing the carbon dioxide measurements taken at different times during the respiratory cycle to corresponding reference levels. These levels often occur when the apparatus no longer is measuring accurately. When recalibration is indicated the apparatus waits until the patient begins inhaling so that the recalibration does not interfere with measuring the carbon dioxide during exhalation. The apparatus then measures the carbon dioxide content of the ambient air to define an offset value used in patient monitoring.

REFERENCES:
patent: 4578762 (1986-03-01), Wong
patent: 5060656 (1991-10-01), Howard

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