System and method for controlling an implantable medical device subject to magnetic field or radio frequency exposure
First Claim
1. A method for operating a system for controlling delivery of a therapy by an implantable medical device susceptible to malfunctioning during exposure to at least one of a magnetic field or a Radio Frequency field, the method comprising the steps of:
- detecting exposure of the implantable device to the at least one of the magnetic field or the Radio Frequency field using a sensing device;
when the at least one field being detected exceeds a corresponding predetermined threshold level, generating an input signal at a microcontroller; and
automatically triggering, in response to the generated input signal, (i) a safety mode enabling a predetermined safety mode operation during which the implantable medical device ceases performance of its therapy without ceasing all operation of the implantable medical device, and (ii) after expiration of a predetermined safety mode time interval when the at least one field being detected falls below its corresponding predetermined threshold level or a predetermined period of time elapses, a self testing mode enabling a predetermined self testing operation to verify proper operation of the implantable medical device.
2 Assignments
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Accused Products
Abstract
A system for controlling an implantable medical device (e.g., a drug delivery device) susceptible to malfunctioning during exposure to a magnetic field and/or Radio Frequency field (e.g., during a magnetic resonance imaging procedure) and a method for operating the same. Exposure of the implantable device to the magnetic field and/or the Radio Frequency field is detected using the sensing device. When the detected magnetic field and/or Radio Frequency field exceeds a corresponding predetermined threshold level, an input signal is generated at the microcontroller. In response to the generated input signal, the microcontroller automatically triggers (i) a safety mode enabling a predetermined safety mode operation that alters some operation, without ceasing all operation, of the implantable medical device and/or (ii) after expiration of a predetermined safety mode time interval when the at least one field being detected falls below its corresponding predetermined threshold level or a predetermined period of time elapses, a self testing mode enabling a predetermined self testing operation to verify proper operation of the implantable medical device. Preferably, both the safety and self testing modes are automatically triggered.
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Citations
10 Claims
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1. A method for operating a system for controlling delivery of a therapy by an implantable medical device susceptible to malfunctioning during exposure to at least one of a magnetic field or a Radio Frequency field, the method comprising the steps of:
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detecting exposure of the implantable device to the at least one of the magnetic field or the Radio Frequency field using a sensing device; when the at least one field being detected exceeds a corresponding predetermined threshold level, generating an input signal at a microcontroller; and automatically triggering, in response to the generated input signal, (i) a safety mode enabling a predetermined safety mode operation during which the implantable medical device ceases performance of its therapy without ceasing all operation of the implantable medical device, and (ii) after expiration of a predetermined safety mode time interval when the at least one field being detected falls below its corresponding predetermined threshold level or a predetermined period of time elapses, a self testing mode enabling a predetermined self testing operation to verify proper operation of the implantable medical device. - View Dependent Claims (2, 3)
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4. A method for operating a system for controlling an implantable medical device susceptible to malfunctioning during exposure to at least one of a magnetic field or a Radio Frequency field, the method comprising the steps of:
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detecting exposure of the implantable device to the at least one of the magnetic field or the Radio Frequency field using a sensing device; when the at least one field being detected exceeds a corresponding predetermined threshold level, generating an input signal at a microcontroller; and automatically triggering, in response to the generated input signal, (i) a safety mode enabling a predetermined safety mode operation including calculating memory checksums, and (ii) after expiration of a predetermined safety mode time interval when the at least one field being detected falls below its corresponding predetermined threshold level or a predetermined period of time elapses, a self testing mode enabling a predetermined self testing operation to verify proper operation of the implantable medical device including verifying the checksums calculated during the safety mode. - View Dependent Claims (5)
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6. A system for controlling delivery of a therapy by an implantable device susceptible to malfunctioning during exposure to at least one of a magnetic field or Radio Frequency field, the system comprising:
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a sensing device for detecting exposure of the implantable drug delivery device to the at least one of the magnetic field or the Radio Frequency field; and a microcontroller electrically connected to the sensing device, the microcontroller receiving an input signal when the at least one field being detected exceeds a corresponding predetermined threshold level;
the microcontroller automatically triggering, in response to the input signal, (i) a safety mode enabling a predetermined safety mode operation during which the implantable medical device ceases performance of its therapy without ceasing all operation of the implantable medical device, and (ii) after expiration of a predetermined safety mode time interval when the at least one field being detected falls below its corresponding predetermined threshold level or a predetermined period of time elapses, a self testing mode enabling a predetermined self testing operation to verify proper operation of the implantable medical device. - View Dependent Claims (7, 8)
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9. A system for controlling an implantable device susceptible to malfunctioning during exposure to at least one of a magnetic field or Radio Frequency field, the system comprising:
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a sensing device for detecting exposure of the implantable drug delivery device to the at least one of the magnetic field or the Radio Frequency field; and a microcontroller electrically connected to the sensing device, the microcontroller receiving an input signal when the at least one field being detected exceeds a corresponding predetermined threshold level;
the microcontroller automatically triggering, in response to the generated input signal, (i) a safety mode enabling a predetermined safety mode operation including calculating memory checksums, and (ii) after expiration of a predetermined safety mode time interval when the at least one field being detected falls below its corresponding predetermined threshold level or a predetermined period of time elapses, a self testing mode enabling a predetermined self testing operation to verify proper operation of the implantable medical device including verifying the checksums calculated during the safety mode. - View Dependent Claims (10)
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Specification