ADAPTIVE ALARM SYSTEM
First Claim
1. An adaptive alarm system is responsive to a physiological parameter so as to generate an alarm threshold that adapts to baseline drift in the parameter so as to reduce false alarms without a corresponding increase in missed true alarms, the adaptive alarm system comprising:
- a parameter derived from a physiological measurement system having a sensor in communication with a living being;
a baseline processor that calculates a parameter baseline from an average value of the parameter;
a plurality of parameter limits that specify an allowable range of the parameter;
an adaptive threshold processor that calculates an adaptive threshold from the parameter baseline and the parameter limits;
an alarm generator responsive to the parameter and the adaptive threshold so as to trigger an alarm indicative of the parameter crossing the adaptive threshold; and
the adaptive threshold responsive to the parameter baseline so as to increase in value as the parameter baseline drifts to a higher parameter value and to decrease in value as the parameter baseline drifts to a lower parameter value.
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Abstract
An adaptive alarm system is responsive to a physiological parameter so as to generate an alarm threshold that adapts to baseline drift in the parameter and reduce false alarms without a corresponding increase in missed true alarms. The adaptive alarm system has a parameter derived from a physiological measurement system using a sensor in communication with a living being. A baseline processor calculates a parameter baseline from a parameter trend. Parameter limits specify an allowable range of the parameter. An adaptive threshold processor calculates an adaptive threshold from the parameter baseline and the parameter limits. An alarm generator is responsive to the parameter and the adaptive threshold so as to trigger an alarm indicative of the parameter crossing the adaptive threshold. The adaptive threshold is responsive to the parameter baseline so as to increase in value as the parameter baseline drifts to a higher parameter value and to decrease in value as the parameter baseline drifts to a lower parameter value.
412 Citations
20 Claims
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1. An adaptive alarm system is responsive to a physiological parameter so as to generate an alarm threshold that adapts to baseline drift in the parameter so as to reduce false alarms without a corresponding increase in missed true alarms, the adaptive alarm system comprising:
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a parameter derived from a physiological measurement system having a sensor in communication with a living being; a baseline processor that calculates a parameter baseline from an average value of the parameter; a plurality of parameter limits that specify an allowable range of the parameter; an adaptive threshold processor that calculates an adaptive threshold from the parameter baseline and the parameter limits; an alarm generator responsive to the parameter and the adaptive threshold so as to trigger an alarm indicative of the parameter crossing the adaptive threshold; and the adaptive threshold responsive to the parameter baseline so as to increase in value as the parameter baseline drifts to a higher parameter value and to decrease in value as the parameter baseline drifts to a lower parameter value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An adaptive alarm method comprising:
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measuring a physiological parameter; establishing a baseline for the parameter; adjusting an alarm threshold according to drift of the baseline; and triggering an alarm in response to the parameter measurement crossing the alarm threshold. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An adaptive alarm system comprising:
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a baseline processor that inputs a parameter and outputs a baseline according to a trend of the parameter; an adaptive threshold processor that establishes an alarm threshold at a delta difference from the baseline; and an alarm generator triggers an alarm based upon a parameter transient from the baseline crossing the alarm threshold. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification