A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
326/13.6
A61B 5/08 (2006.01) G01N 1/22 (2006.01) G01N 1/34 (2006.01)
Patent
CA 1324638
MULTICHANNEL GAS ANALYZER AND METHOD OF USE ABSTRACT An improved gas analyzer system and method for detecting and displaying information with respect to gases of interest in a respiratory gas stream, with the system comprising an optical bench further comprising a gas pathway for the flow of a gas stream through the optical bench, a flow shaping inlet at the gas entrance to the optical bench's gas pathway, two infrared detection channel assemblies for measur- ing the partial pressures of the gases of interest in the respiratory gas stream, a pressure sensor for measuring the pressure within the gas pathway, a temperature sensor for measuring the temperature within the optical bench, and a flow rate sensor for measuring the gas flow rate through the gas pathway, circuitry for processing the detected partial pres- sures of the gases of interest and the measured values for pressure, temperature, and flow rate, and for providing output signals indicative of processed measured values, the detected partial pressures of the gas of interest, and characterization infor- mation with respect to the optical bench components; analog input circuitry for processing the signals output from the optical bench for input to the analog processing circuitry; analog processing circuitry for processing the signals input thereto and correct- ing at least the detected partial pressures of the gases of interest signals for collision broadening, temperature, pressure in the gas pathway, barometric pressure, cross-correction, and characterization of the optical bench components, and providing output signals indicative of the corrected partial pressures of the gases of interest to the display processing circuitry; display processing circuitry for processing the signals input thereto for display of at least the corrected partial pressure of one gas of interest on a cathode ray tube as numerical and/or scrolling graphical data, for output to analog and digital output connections, and for alarms; and a power supply for powering the system.
616565
Braig James R.
Corenman James E.
Gallup David A.
Goldberger Daniel S.
Richards Edward M.
Gowling Lafleur Henderson Llp
Nellcor Inc.
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