Alert management for physiological event detection
First Claim
1. A system for managing alerts associated with a target physiological event in a subject, the system comprising:
- a physiological sensor circuit including a sense amplifier circuit to sense a physiological signal;
a signal processor circuit configured to generate a signal metric trend from the sensed physiological signal;
an alert management circuit coupled to the signal processor circuit, the alert management circuit including;
a comparator circuit to detect from the signal metric trend (1) one or more alert onsets using an onset threshold and (2) one or more corresponding alert terminations using a reset threshold;
an alert generator circuit to issue one or more alerts corresponding to the detected one or more alert onsets and one or more alert terminations, and to generate a reference alert characteristic, including an alert timing or an alert statistic, using timing information or a count of the previously issued one or more alerts; and
a parameter adjuster circuit to iteratively adjust the onset or reset threshold, including;
when the reference alert characteristic of the one or more alerts fails to satisfy a specified alert characteristic, adjust the onset or reset threshold until the reference alert characteristic of the one or more alerts corresponding to the adjusted onset or reset threshold satisfies the specified alert characteristic; and
when the reference alert characteristic of the one or more alerts satisfies the specified alert characteristic, determine target onset and reset thresholds for presenting to a user or a process, anda user interface for generating a human-perceptible presentation of the one or more alerts.
1 Assignment
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Accused Products
Abstract
Systems, devices, and methods for managing alerts associated with a target physiological event such as a worsening heart failure event are described. A system may detect one or more alert onsets using an onset threshold, and one or more corresponding alert terminations using a reset threshold. Alerts may be issued corresponding to the detected alert onsets and alert terminations. The system may compare the alerts to a specified alert characteristic, and iteratively adjust the onset or reset threshold until the alerts corresponding to the adjusted onset or reset threshold satisfy the specified alert characteristic. The adjusted onset and reset thresholds may be presented to a user or a process for detecting the target physiological event.
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Citations
20 Claims
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1. A system for managing alerts associated with a target physiological event in a subject, the system comprising:
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a physiological sensor circuit including a sense amplifier circuit to sense a physiological signal; a signal processor circuit configured to generate a signal metric trend from the sensed physiological signal; an alert management circuit coupled to the signal processor circuit, the alert management circuit including; a comparator circuit to detect from the signal metric trend (1) one or more alert onsets using an onset threshold and (2) one or more corresponding alert terminations using a reset threshold; an alert generator circuit to issue one or more alerts corresponding to the detected one or more alert onsets and one or more alert terminations, and to generate a reference alert characteristic, including an alert timing or an alert statistic, using timing information or a count of the previously issued one or more alerts; and a parameter adjuster circuit to iteratively adjust the onset or reset threshold, including; when the reference alert characteristic of the one or more alerts fails to satisfy a specified alert characteristic, adjust the onset or reset threshold until the reference alert characteristic of the one or more alerts corresponding to the adjusted onset or reset threshold satisfies the specified alert characteristic; and when the reference alert characteristic of the one or more alerts satisfies the specified alert characteristic, determine target onset and reset thresholds for presenting to a user or a process, and a user interface for generating a human-perceptible presentation of the one or more alerts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for managing alerts associated with a target physiological event in a subject via an alert management system, the method comprising:
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sensing a physiological signal; generating a signal metric trend from the sensed physiological signal; detecting from the signal metric trend (1) one or more alert onsets using an onset threshold and (2) one or more corresponding alert terminations using a reset threshold; issuing one or more alerts corresponding to the detected one or more alert onsets and one or more alert terminations; generating a reference alert characteristic;
including an alert timing or an alert statistic, using timing information or a count of the previously one or more alerts; anditeratively adjusting the onset or reset threshold via the alert management system, the iterative adjustment including; when the reference alert characteristic of the one or more alerts fails to satisfy a specified alert characteristic;
adjusting the onset or reset threshold until the reference alert characteristic of the one or more alerts corresponding to the adjusted onset or reset threshold satisfies the specified alert characteristic; andwhen the reference alert characteristic of the one or more alerts satisfies the specified alert characteristic, determining target onset and reset thresholds for presenting to a user or a process; and generating a human-perceptible presentation of the one or more alerts. - View Dependent Claims (17, 18, 19, 20)
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Specification