New method of respiratory gas analysis: light spectrometer
| Autor: | R. B. Fraser, S. Z. Turney |
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| Rok vydání: | 1985 |
| Předmět: | |
| Zdroj: | Journal of Applied Physiology. 59:1001-1007 |
| ISSN: | 1522-1601 8750-7587 |
| DOI: | 10.1152/jappl.1985.59.3.1001 |
| Popis: | A multigas concentration analyzer particularly suited for respiratory gas analysis has been developed using a new principle based on the measurement of the intensity of light emitted by excited atoms or ions in a direct current glow discharge. This glow discharge spectral emission gas analyzer (GDSEA), or light spectrometer, simultaneously measures O2, N2, CO2, He, and N2O gas concentrations with a 0–90% response time of 100 ms and a sample rate of less than 20 ml/min in a short gas sample line configuration. Mole accuracy and resolution of the GDSEA using a short sample line were determined in the laboratory to be +/- 0.15 to +/- 0.7% and 0.02–0.05%, respectively. In the clinical setting a comparative evaluation was made with a mass spectrometer in a long sample line, computerized, multibed, respiratory monitoring system. Results indicate a close agreement between the two instruments with differences in mixed inspiratory or expiratory O2 and CO2 concentrations of less than 2% and of derived variables, such as O2 consumption, CO2 production, and respiratory exchange ratio, of less than 5%. |
| Databáze: | OpenAIRE |
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