Event registration for automatic threshold setting
First Claim
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1. An implantable medical device, comprising:
- a sensor for sensing a first signal in a patient;
detection circuitry for receiving the first signal and determining a parameter corresponding to the first signal;
memory for storing the parameter; and
control circuitry configured to receive a second signal corresponding to a defined first event following storage of the parameter and further configured to determine a threshold from the stored parameter in response to receiving the second signal;
wherein the detection circuitry comprises circuitry for detecting a defined second event in response to the parameter subsequently crossing the determined threshold; and
wherein determining the threshold comprises determining the threshold using a value of the parameter stored at a time prior to the receipt of the second signal.
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Abstract
An implantable medical device includes a sensor for sensing a first signal in a patient, detection circuitry for receiving the first signal, determining a parameter therefrom, and detecting a first event in response to the parameter. The device further includes control circuitry configured to receive a second signal corresponding to a second event and to determine a threshold from the stored parameter in response to receiving the second event signal. The detection circuitry detects the first event in response to the parameter crossing the determined threshold.
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Citations
14 Claims
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1. An implantable medical device, comprising:
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a sensor for sensing a first signal in a patient; detection circuitry for receiving the first signal and determining a parameter corresponding to the first signal; memory for storing the parameter; and control circuitry configured to receive a second signal corresponding to a defined first event following storage of the parameter and further configured to determine a threshold from the stored parameter in response to receiving the second signal; wherein the detection circuitry comprises circuitry for detecting a defined second event in response to the parameter subsequently crossing the determined threshold; and wherein determining the threshold comprises determining the threshold using a value of the parameter stored at a time prior to the receipt of the second signal. - View Dependent Claims (2)
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3. An implantable medical device, comprising:
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a sensor for sensing a first signal in a patient; detection circuitry for receiving the first signal and determining a parameter corresponding to the first signal; memory for storing the parameter; and control circuitry configured to receive a second signal corresponding to a defined first event following storage of the parameter and further configured to determine a threshold from the stored parameter in response to receiving the second signal; wherein the detection circuitry comprises circuitry for detecting a defined second event in response to the parameter subsequently crossing the determined threshold; and further comprising telemetry circuitry coupled to the control circuitry and wherein the second signal comprises an externally generated signal received by the telemetry circuitry. - View Dependent Claims (4)
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5. An implantable medical device, comprising:
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a sensor for sensing a first signal in a patient; detection circuitry for receiving the first signal and determining a parameter corresponding to the first signal; memory for storing the parameter; and control circuitry configured to receive a second signal corresponding to a defined first event following storage of the parameter and further configured to determine a threshold from the stored parameter in response to receiving the second signal; wherein the detection circuitry comprises circuitry for detecting a defined second event in response to the parameter subsequently crossing the determined threshold; and wherein the second signal corresponds to a worsening of the parameter subsequent to a storage of the parameter. - View Dependent Claims (6)
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7. An implantable medical device, comprising:
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a sensor for sensing a first signal in a patient; detection circuitry for receiving the first signal and determining a parameter corresponding to the first signal; memory for storing the parameter; and control circuitry configured to receive a second signal corresponding to a defined first event following storage of the parameter and further configured to determine a threshold from the stored parameter in response to receiving the second signal; wherein the detection circuitry comprises circuitry for detecting a defined second event in response to the parameter subsequently crossing the determined threshold; and wherein the sensor comprises an impedance sensor. - View Dependent Claims (8, 9)
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10. An implantable medical device system, comprising:
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an implanted sensor for sensing a first signal in a patient; detection circuitry for receiving the first signal and determining a parameter corresponding to the first signal; memory for storing the parameter; control circuitry configured to receive a second signal corresponding to a defined first event following storage of the parameter and further configured to determine a threshold from the stored parameter in response to receiving the second signal; an implantable telemetry circuit providing the second signal to the control circuit; and an external telemetry circuit in bidirectional communication with the implantable telemetry circuit, the external telemetry circuit adapted to transmit the second signal to the implantable telemetry circuit; wherein the detection circuitry comprises circuitry for detecting a defined second event in response to the parameter subsequently crossing the determined threshold. - View Dependent Claims (11, 12, 13, 14)
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Specification