US Patent No: 5,738,106
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Capnometer
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Apr 14, 1998
Issued date -
Feb 23, 1996
filing date -
08/605,928
serial no -
In Force
status
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Abstract
The capnometer of the invention is an equipment which detects a signal which time-varies in accordance with a carbon dioxide concentration from a respiration gas, thereby calculating the carbon dioxide concentration. The capnometer has: carbon dioxide concentration calculating device for detecting the maximum value for each expiration from a concentration signal corresponding to the calculated carbon dioxide concentration, for comparing the maximum value with concentration signals respectively corresponding to a plurality of predetermined concentration ranges, and for outputting one of different control signals for the concentration ranges; and reporting device for outputting a sound corresponding to the carbon dioxide concentration, in accordance with the control signal.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,653,498 Pulse oximeter monitor | 309 | 1986 | |
| 4,907,166 Multichannel gas analyzer and method of use | 26 | 1987 | |
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| 5,081,998 Optically stabilized infrared energy detector | 50 | 1990 | |
| 5,095,913 Shutterless optically stabilized capnograph | 62 | 1990 | |
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| 5,363,857 Metabolic analyzer | 39 | 1993 | |
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| 4,423,739 End tidal carbon dioxide gas analyzer | 57 | 1981 | |
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| 4,269,194 Carbon dioxide measurement from expired gases in a partial rebreathing anesthesia circuit | 22 | 1979 | |
| 5,095,896 Audio-capnometry apparatus | 13 | 1991 | |