DETECTING PROXIMITY TO MRI SCANNER
First Claim
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1. A system comprising:
- an implantable medical device (IMD) configured to be implanted into a subject, the IMD including a first therapy mode and a second therapy mode, the second therapy mode different than the first therapy mode;
a plurality of scanner field sensors configured to receive separate indications of a scanner field; and
wherein the IMD is configured to receive each of the separate indications of the scanner field, to switch from the first therapy mode to the second therapy mode using one or more of the plurality of scanner field sensors, and to switch from the second therapy mode to the first therapy mode using each of the plurality of scanner field sensors.
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Abstract
A plurality of separate indications of a scanner field can be received using a corresponding plurality of scanner field sensors of an implantable medical device (IMD). In an example, the IMD can be switched from a first therapy mode to a second therapy mode using one or more of the plurality of scanner field sensors, and from the second therapy mode back to the first therapy mode using each of the plurality of scanner field sensors. In certain examples, shock therapy can be terminated or inhibited using a detected proximity of the IMD to a magnetic resonance imaging (MRI) scanner, or antitachycardia pacing (ATP) can be terminated or inhibited using a detected active scan of the MRI scanner.
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Citations
20 Claims
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1. A system comprising:
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an implantable medical device (IMD) configured to be implanted into a subject, the IMD including a first therapy mode and a second therapy mode, the second therapy mode different than the first therapy mode; a plurality of scanner field sensors configured to receive separate indications of a scanner field; and wherein the IMD is configured to receive each of the separate indications of the scanner field, to switch from the first therapy mode to the second therapy mode using one or more of the plurality of scanner field sensors, and to switch from the second therapy mode to the first therapy mode using each of the plurality of scanner field sensors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system comprising:
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an implantable medical device (IMD) configured to be implanted into a subject, the IMD including a first mode and a magnetic resonance imaging (MRI) mode; a plurality of scanner field sensors configured to receive separate indications of a scanner field, the plurality of scanner field sensors including at least one static magnetic field sensor and at least one active magnetic or electric field sensor; and wherein the IMD is configured to receive each of the separate indications of the scanner field, to switch from the first mode to the MRI mode using one or more of the plurality of scanner field sensors, and to switch from the MRI mode to the first mode using each of the plurality of scanner field sensors. - View Dependent Claims (11, 12, 13)
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14. A method including:
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receiving each of a plurality of separate indications of a scanner field using a corresponding plurality of scanner field sensors of an IMD; switching an IMD from a first therapy mode to a second therapy mode using one or more of the plurality of scanner field sensors; and switching the IMD from the second therapy mode to the first therapy mode using each of the plurality of scanner field sensors. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification