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Noninvasive optical determination of partial pressure of carbon dioxide
Noninvasive optical determination of partial pressure of carbon dioxide
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机译:二氧化碳分压的非侵入式光学测定
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摘要
Herein is disclosed a sensor for noninvasive measurement of the partial pressure of CO2 (pCO2) in the skin of a human. The sensor comprises a housing, a gas measuring chamber for measuring gases, at least one chimney for communication of gases diffusing through the skin to the gas measuring chamber, a broad band light source transmitting light into the gas measuring chamber and a detector system comprising a first and a second photodetector. The first photodetector detects light at a wavelength wherein CO2 absorbs light and the second photodetector acts as a zero reference detector by measuring light in a freeband where no gases absorb light.
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