| 摘要 |
PROBLEM TO BE SOLVED: To provide an airway gas analyzer capable of analyzing local airway gas by being inserted in an airway of a lung, etc.SOLUTION: An infrared light source 1 and a near-infrared laser light source 2 are combined by a beam splitter 3 and are made incident to a hollow optical fiber 4. The tip of the hollow optical fiber 4 is inserted in the inside of a lung through a catheter 5. A gas cell 6 is attached to the tip of the fiber, and gas to be measured flows into the inside through a gas introduction hole 8. Light reflected by a reflector 9 at a terminal of the gas cell 6 is discriminated into infrared light and near-infrared light by a wavelength selective beam splitter 10, and is detected by an infrared detector 11 and a Raman spectrometer 12. The infrared detector 11 can analyze mainly a concentration of carbon dioxide by an infrared absorption spectroscopic method, and the Raman spectrometer 12 can analyze mainly a concentration of oxygen by a Raman spectroscopic method. Thus, it is possible to analyze local airway gas in the inside of a lung.SELECTED DRAWING: Figure 1 |
