Electromagnetic interference alarm
First Claim
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1. A portable medical device electrically coupled to a patient, comprising:
- a sensor for sensing physiologic conditions of the patient;
circuitry coupled to the sensor for providing therapy in response to the sensed physiologic conditions;
a detector coupled to the cardiac device for detecting the presence of electromagnetic interference; and
an alarm coupled to the detector to signal the patient of the implantable medical device of the presence of electromagnetic interference and the magnitude thereof.
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Abstract
An apparatus and method are disclosed including an implantable medical device electrically coupled to a patient, having a sensor for sensing physiologic conditions and circuitry coupled to the sensor for emitting therapy in response to sensed physiologic conditions. A detector is coupled to the cardiac device for detecting the presence of electromagnetic interference and the intensity thereof and an alarm is coupled to the detector to signal the patient of the implantable medical device of the presence of electromagnetic interference.
23 Citations
39 Claims
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1. A portable medical device electrically coupled to a patient, comprising:
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a sensor for sensing physiologic conditions of the patient;
circuitry coupled to the sensor for providing therapy in response to the sensed physiologic conditions;
a detector coupled to the cardiac device for detecting the presence of electromagnetic interference; and
an alarm coupled to the detector to signal the patient of the implantable medical device of the presence of electromagnetic interference and the magnitude thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A cardiac device electrically coupled to a heart, comprising:
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a sensor for sensing physologic signals produced in the heart;
circuitry coupled to the sensor for emitting therapy pulses at an adjustable rate in response to the sensed rate of the physiologic signals;
a detector coupled to the cardiac device for detecting the presence of disruptive electromagnetic interference; and
an alarm of variable intensity coupled to the detector to signal the patient of the medical device that the function of the sensing circuit has been compromised, and to what degree. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. In a medical device electrically coupled to a patient, a method for alerting the patient of the presence of disruptive electromagnetic interference and the intensity thereof, the method comprising:
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sensing at least one physologic signal of a patient;
delivering an electrical stimulation therapy in response to the sensing of the at least one physiologic signal;
detecting the presence of disruptive electromagnetic interference in proximity to the patient; and
signaling the patient of the implantable medical device of the presence of disruptive electromagnetic interference and the intensity thereof. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A computer-readable medium capable of executing the following instructions for performing a method of detecting electromagnetic interference capable of interfering with the operation of a medical device, said method operating under processor control and comprising the following steps:
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instructions for sensing physiologic signals of a patient;
instructions for delivering therapy in response to the sensed physiologic signals;
instructions for detecting the presence of an electromagnetic interference capable of interfering with said sensing of physiologic signals or said delivering of therapy; and
instructions for signaling the patient of the presence of the electromagnetic interference. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39)
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Specification