Surgery – Truss – Pad
Patent
1990-01-25
1992-07-14
Cohen, Lee S.
Surgery
Truss
Pad
128719, 128725, 346 33OME, A61B 508
Patent
active
051294010
ABSTRACT:
A gas analyzer system and method for detecting and displaying information of gases in a respiratory gas stream, comprising an optical bench including a gas pathway for the flow of a gas stream through the optical bench, a flow shaping inlet at the entrance to the optical bench's gas pathway, two infrared detection channel assemblies for measuring the partial pressures of the gases 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 pressures of the gases 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 gasses, and characterization information with respect to the optical bench components; analog input circuitry for processing the signals output from the optical bench for input to analog processing circuitry; analog processing circuitry for processing and correcting at least the detected partial pressures of the gases 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 to display processing circuitry; display processing circuitry for processing the signals for display of at least the corrected partial pressure of one gas on a cathode ray tube.
REFERENCES:
patent: 4094310 (1978-06-01), McEachern et al.
patent: 4440177 (1984-04-01), Anderson et al.
Jacobsen et al., "Switching device . . . Signals", Med. & Biol. Eng & Comput. Jul. 1979, 17, No. 4, 536-538 (Copy 128/725).
Modesto et al., "Drift-free . . . Studies", Med & Biol. Eng & Comput., Jul 1982, 20, No. 4, 457-460 (Copy 128/725).
Datascope "Accuccp Co.sub.2 /O.sub.2 Monitor", 1983 (Copy 128/719).
Braig James R.
Corenman James E.
Gallup David A.
Goldberger Daniel S.
Richards Edward M.
Cohen Lee S.
Nellcor, Inc.
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