Event detection using a variable threshold
First Claim
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1. A method of operating a medical device system, the method comprising:
- sensing physiological information of a subject using the medical device, the physiological information associated with heart failure of the subject;
determining a trend of the received physiological information; and
displaying one of an onset threshold indicative of onset of a physiological alert condition associated with heart failure or a reset threshold indicative of an end of the physiological alert condition according to a state of a medical device so that when the onset threshold is displayed the reset threshold is not displayed and vice versa, the method further comprising;
in a first state, comparing the determined trend to the onset threshold, and;
while the determined trend is below the onset threshold, displaying the onset threshold; and
when the determined trend exceeds the onset threshold, displaying the reset threshold and transitioning to a second state;
in the second state, comparing the determined trend to the reset threshold, and;
while the determined trend is above the reset threshold, displaying the determined trend and the reset threshold; and
when the determined trend falls below the reset threshold, displaying the onset threshold and transitioning to the first state.
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Abstract
Devices and methods for detecting an event using a variable threshold. A patient monitoring system can receive physiologic information and compare the information to an onset threshold. When the onset threshold is exceeded, the system shifts to a reset threshold that is different than the onset threshold. When the reset threshold is crossed, the system shifts back to the onset threshold.
15 Citations
20 Claims
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1. A method of operating a medical device system, the method comprising:
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sensing physiological information of a subject using the medical device, the physiological information associated with heart failure of the subject; determining a trend of the received physiological information; and displaying one of an onset threshold indicative of onset of a physiological alert condition associated with heart failure or a reset threshold indicative of an end of the physiological alert condition according to a state of a medical device so that when the onset threshold is displayed the reset threshold is not displayed and vice versa, the method further comprising; in a first state, comparing the determined trend to the onset threshold, and; while the determined trend is below the onset threshold, displaying the onset threshold; and when the determined trend exceeds the onset threshold, displaying the reset threshold and transitioning to a second state; in the second state, comparing the determined trend to the reset threshold, and; while the determined trend is above the reset threshold, displaying the determined trend and the reset threshold; and when the determined trend falls below the reset threshold, displaying the onset threshold and transitioning to the first state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of operating a medical device system, comprising:
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sensing physiological information of a subject; determining at least one physiologic parameter using the received physiological information; determining a first trend of the at least one physiologic parameter using multiple samples of the received physiological information, the at least one physiologic parameter associated with heart failure; displaying one of an onset threshold indicative of onset of a physiological alert condition associated with heart failure or a reset threshold indicative of an end of the physiological alert condition according to a state of the medical device so that when the onset threshold is displayed the reset threshold is not displayed and vice versa, the method further comprising; in a first state, comparing the first trend to the onset threshold, and; while the determined trend is below the onset threshold, displaying the onset threshold; when the first trend exceeds the onset threshold, displaying the reset threshold and transitioning to a second state; in the second state, determining a second trend of the at least one physiologic parameter using the samples detected after the first trend exceeds the onset threshold, comparing the second trend to a reset threshold that is lower than the onset threshold, and; while the second determined trend is above the reset threshold, displaying the second determined trend and the reset threshold; and when the determined second trend falls below the reset threshold, displaying the onset threshold and transitioning to the first state. - View Dependent Claims (11, 12, 13, 14)
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15. A patient monitoring system comprising:
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a display; a sense circuit configured to sense physiologic information of a subject, the physiological information associated with heart failure of the subject; and a physiologic data analyzer circuit configured to; receive the sensed physiological information of a subject, the physiological; determine a trend of the received physiological information; and display one of an onset threshold indicative of onset of a physiological alert condition associated with heart failure or a reset threshold indicative of an end of the physiological alert condition according to a state of the physiologic data analyzer circuit so that when the onset threshold is displayed the reset threshold is not displayed and vice versa, the displaying comprising; in a first state, comparing the determined trend to an onset threshold indicative of onset of a physiological alert condition associated with heart failure, and; while the determined trend is below the onset threshold, displaying the onset threshold; and when the determined trend exceeds the onset threshold, displaying the reset threshold and transitioning to a second state; in the second state, comparing the determined trend to the reset threshold, and; while the determined trend is above the reset threshold, displaying the determined trend and the reset threshold; and when the determined trend falls below the reset threshold, display the onset threshold and transitioning to the first state. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification