Human Cavity Gas Measurement Device And Method
First Claim
1. A device configured to measure free gas in a body cavity, comprising a light emitter (1, 2) configured to emit light towards said body cavity from outside said body cavity,characterized bya light receiver (4) configured to collect scattered light from tissue surrounding said body cavity, configured to observe at least one wavelength window specific for a free gas in the body cavity;
- anda calculating means for assessing a concentration of said free gas in said body cavity from said collected scattered light, based on optical absorption spectroscopy.
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Abstract
A device and method for gas measurements in body cavities are provided. These may be any body cavity containing a free gas, where there is an interest in detecting and/or measuring the concentration of said free gas by means of a non-invasive or minimally invasive method. According to an exemplary embodiment measurement of free oxygen in cranium cavities is performed by scattering media absorption spectroscopy, and in particular variations of such oxygen. This is particularly useful for diagnostic purposes based on the measurements, for instance for detecting sinusitis or the like.
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Citations
49 Claims
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1. A device configured to measure free gas in a body cavity, comprising a light emitter (1, 2) configured to emit light towards said body cavity from outside said body cavity,
characterized by a light receiver (4) configured to collect scattered light from tissue surrounding said body cavity, configured to observe at least one wavelength window specific for a free gas in the body cavity; - and
a calculating means for assessing a concentration of said free gas in said body cavity from said collected scattered light, based on optical absorption spectroscopy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method of non-invasively measuring free gas in a body cavity, comprising emitting light towards said body cavity from outside said body cavity,
characterized by collecting scattered light from tissue surrounding said body cavity, to thereby observe at least one wavelength window specific for a free gas in the body cavity; - and
assessing a concentration of said free gas in said body cavity from said collected scattered light, based on optical absorption spectroscopy. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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Specification