Nuisance alarm reductions in a physiological monitor
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Accused Products
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.
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Citations
33 Claims
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1-21. -21 (cancelled)
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22. A method for controlling an alarm in a medical diagnostic apparatus, said apparatus monitoring a measured value, said method comprising:
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measuring a value of a physiological parameter;
continuously calculating a baseline value derived from said physiological parameter;
automatically establishing a dynamic threshold value, wherein said dynamic threshold value is derived from and remains functionally related with said baseline value;
establishing a condition value from a combination of said measured value and said dynamic threshold value, wherein said condition value comprises an integrated product of the extent by which said dynamic threshold value is exceeded by said measured value over a quantity of time said dynamic threshold value is exceeded by said measured value; and
triggering an alarm when said condition value exceeds a predetermined level. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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23. A method for controlling an alarm in a medical diagnostic apparatus, said apparatus monitoring a measured value, said method comprising:
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measuring a value of a physiological parameter in the presence of measurement bias;
continuously calculating a baseline value derived from said physiological parameter;
automatically establishing a dynamic threshold value, wherein said dynamic threshold value is derived from and remains functionally related with said baseline value;
establishing a condition value from a combination of said measured value and said dynamic threshold value, wherein said condition value comprises an integrated product of the extent by which said dynamic threshold value is exceeded by said measured value over a quantity of time said dynamic threshold value is exceeded by said measured value; and
triggering an alarm when said condition value exceeds a predetermined level.
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Specification