发明名称 |
Carbon dioxide measurement from expired gases in a partial rebreathing anesthesia circuit |
摘要 |
A method of determining arterial carbon dioxide tension from mixed expired gases of a patient utilizing a partial rebreathing anesthesia circuit. An electrode is inserted into expired gases of a patient to measure expired carbon dioxide tension. An output signal from the electrode, which indicates expired carbon dioxide tension, has a very high impedance. By reducing the impedance of the output signal, a more usable signal is obtained. Also, the signal must be converted to a relatively linear function, which is then scaled to give a visual indication proportionate to the arterial carbon dioxide tension. The electrode is pre-calibrated by gases having known percentages of carbon dioxide. The scaling factor is included to compensate for differences between the expired carbon dioxide tension and arterial carbon dioxide tension.
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申请公布号 |
US4269194(A) |
申请公布日期 |
1981.05.26 |
申请号 |
US19790040056 |
申请日期 |
1979.05.17 |
申请人 |
RAYBURN, ROBERT L.;WATSON, ROBERT L.;ELBEL, CHARLES R.;SCHWEICKARDT, KARL W. |
发明人 |
RAYBURN, ROBERT L.;WATSON, ROBERT L.;ELBEL, CHARLES R.;SCHWEICKARDT, KARL W. |
分类号 |
A61B5/083;A61M16/10;G01N33/497;(IPC1-7):A61B5/08 |
主分类号 |
A61B5/083 |
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地址 |
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