Nuisance alarm reductions in a physiological monitor
First Claim
1. A method for controlling an alarm in a medical diagnostic apparatus, the method comprising:
- measuring a value of a physiological parameter to obtain a measured value;
determining a dynamic threshold value correlative to the measured value;
establishing a condition value based at least in part on an integrated product of the extent by which the dynamic threshold value is passed by the measured value over a period of time; and
triggering an alarm when the condition value exceeds a threshold level.
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Abstract
A method and apparatus for controlling alarms in a medical diagnostic apparatus where an alarm is generated when a measured value for a physiological parameter is outside a specified range. The method continuously calculates a baseline value, and establishes dynamic thresholds that are related to and continuously track the baseline value. The method determines the amount of time the measured value is past the dynamic threshold, and the amount by which the threshold is passed. Alarms are triggered based upon a combination of the amount of time and the amount by which the threshold is passed. Preferably, the combination is an integral or some function of an integral.
269 Citations
22 Claims
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1. A method for controlling an alarm in a medical diagnostic apparatus, the method comprising:
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measuring a value of a physiological parameter to obtain a measured value; determining a dynamic threshold value correlative to the measured value; establishing a condition value based at least in part on an integrated product of the extent by which the dynamic threshold value is passed by the measured value over a period of time; and triggering an alarm when the condition value exceeds a threshold level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A medical diagnostic apparatus, comprising:
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a sensor configured to deliver a signal based at least in part on a physiological parameter; a processor configured to determine a measured value of the physiological parameter based at least in part on the signal, to determine a dynamic threshold value correlative to the measured value and a condition value based at least in part on an integrated product of the extent by which the dynamic threshold value is passed by the measured value over a period of time, and to trigger an alarm when the condition value exceeds a threshold level. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification