ORAL-NASAL CANNULA SYSTEM ENABLING CO2 AND BREATH FLOW MEASUREMENT
First Claim
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1. An oral-nasal cannula comprising:
- at least one nasal breath inlet for carbon dioxide (CO2) sampling; and
at least one nasal breath inlet for flow measurement, wherein said at least one nasal breath inlet for flow measurement is separated from said at least one nasal breath inlet for CO2 sampling, such that said cannula is configured to facilitate CO2 sampling and flow measurement essentially without cross-interference.
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Abstract
An oral-nasal cannula comprising at least one nasal breath inlet for carbon dioxide (CO2) sampling; and at least one nasal breath inlet for flow measurement, wherein said at least one nasal breath inlet for flow measurement is separated from said at least one nasal breath inlet for CO2 sampling, such that said cannula is configured to facilitate CO2 sampling and flow measurement essentially without cross-interference.
53 Citations
28 Claims
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1. An oral-nasal cannula comprising:
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at least one nasal breath inlet for carbon dioxide (CO2) sampling; and at least one nasal breath inlet for flow measurement, wherein said at least one nasal breath inlet for flow measurement is separated from said at least one nasal breath inlet for CO2 sampling, such that said cannula is configured to facilitate CO2 sampling and flow measurement essentially without cross-interference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An oral-nasal cannula system comprising:
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a CO2 sampling sub-system; and a breath flow measurement sub-system, wherein said CO2 sampling sub-system and said breath flow measurement sub-system are configured to operate independently, essentially without cross-interference. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 26, 28)
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25. A method for sampling CO2 and measuring breath flow, essentially without cross-interference, the method comprising:
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sampling breath for CO2 analysis from at least one nasal breath inlet of an oral-nasal cannula; and collecting breath for breath flow measurement from at least one nasal inlet of the oral-nasal cannula, wherein said at least one nasal breath inlet for flow measurement is separated from said at least one nasal breath inlet for CO2 sampling, such that sampling CO2 and measuring breath flow are essentially not cross-interfering. - View Dependent Claims (27)
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Specification