Gas monitor having trend indicators
First Claim
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1. A cutaneous gas monitor system comprising:
- means for sampling a gas mixture;
means for determining a substanially current partial pressure of a constituent gas in the gas mixture;
means for recording a series of stored partial pressures;
means for adjustably selecting a historical value using the series of stored partial pressures;
means for inputting at least one adjustably selected reference value to the monitor;
means for comparing the current partial pressure, the historic value and the selected reference value to determine when the trend of the current partial pressure as a function of time exceeds the selected reference value;
a display means for signalling the trend of the current partial pressure when the trend as a function of time exceeds the selected reference value.
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Abstract
An improved device for determining the trend of the partial pressure of a gas, such as oxygen or carbon dioxide, which diffuses outwardly through a patient'"'"'s skin. The device, such as a cutaneous gas monitor, generates over time a series of partial pressure input values that are compared to one another for determining a trend in the partial pressure. This trend is communicated to the operator of the device.
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Citations
3 Claims
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1. A cutaneous gas monitor system comprising:
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means for sampling a gas mixture; means for determining a substanially current partial pressure of a constituent gas in the gas mixture; means for recording a series of stored partial pressures; means for adjustably selecting a historical value using the series of stored partial pressures; means for inputting at least one adjustably selected reference value to the monitor; means for comparing the current partial pressure, the historic value and the selected reference value to determine when the trend of the current partial pressure as a function of time exceeds the selected reference value; a display means for signalling the trend of the current partial pressure when the trend as a function of time exceeds the selected reference value. - View Dependent Claims (2, 3)
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Specification