IMPLANTABLE DEVICE FAILSAFE MODE FOR MRI
First Claim
Patent Images
1. An apparatus comprising:
- an implantable medical device, comprising;
a primary controller circuit;
a safety core circuit, separate from the primary controller circuit, the safety core circuit configured to operate independently from the primary controller circuit;
a safety core operating mode storage circuit, coupled to the safety core circuit, the safety core operating mode storage circuit configured to store safety core operating mode information to control whether the safety core circuit is configured to operate in a normal first safety core operating mode or to operate in a magnetic resonance imaging (MRI) second safety core operating mode that is associated with different functionality than the first safety core operating mode; and
a reset controller circuit, coupled to the primary controller circuit and the safety core circuit, the reset controller circuit configured to transition control of operating the implantable medical device from the primary controller circuit to the safety core circuit when a fault or error condition is detected.
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Abstract
An implantable device, such as a pacer, defibrillator, or other cardiac rhythm management device, can include a failsafe backup, such as a separate and independent safety core that can assume control over operation of the implantable device from a primary controller. In an example, the safety core can include a normal first safety core operating mode and a magnetic resonance imaging (MRI) second safety core operating mode that can provide different functionality from the normal first safety core operating mode.
32 Citations
20 Claims
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1. An apparatus comprising:
an implantable medical device, comprising; a primary controller circuit; a safety core circuit, separate from the primary controller circuit, the safety core circuit configured to operate independently from the primary controller circuit; a safety core operating mode storage circuit, coupled to the safety core circuit, the safety core operating mode storage circuit configured to store safety core operating mode information to control whether the safety core circuit is configured to operate in a normal first safety core operating mode or to operate in a magnetic resonance imaging (MRI) second safety core operating mode that is associated with different functionality than the first safety core operating mode; and a reset controller circuit, coupled to the primary controller circuit and the safety core circuit, the reset controller circuit configured to transition control of operating the implantable medical device from the primary controller circuit to the safety core circuit when a fault or error condition is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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operating an implantable medical device under control of a primary controller circuit to provide a diagnostic or therapy to a subject; detecting a fault or error condition in the implantable medical device; and in response to the detected fault or error condition, automatically transitioning operation of the implantable medical device from control by the primary controller circuit to control by a separate back-up circuit including a normal first operating mode and an MRI second operating mode that is associated with different functionality than the first operating mode. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification