System and apparatus for remote activation of implantable medical devices
First Claim
1. An integrated activation system for an implantable medical device (IMD), said activation system and said IMD sharing a power source, said activation system comprising:
- a transistor switching circuit configured to gate power from the power source to the IMD; and
a sensing element coupled to said switching circuit, said sensing element configured to;
detect a change in a surrounding environment;
become activated in response to an initial detected change;
draw current from the power source of less than or equal to about 1 nA during inactivation; and
enable an operation interval of said switching circuit in response to said initial detected change, said operation interval serving a basis for said switching circuit to determine whether to gate power to the IMD;
said switching circuit further configured tomonitor sensing element signals during said operation interval; and
gate power to the IMD upon receipt of a pre-determined number of sensing element signals within said operation interval.
1 Assignment
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Accused Products
Abstract
An integrated activation system for an implantable medical device (IMD) sharing a power source, the activation system having a switching circuit and a sensing element coupled to the switching circuit. The switching circuit is configured to gate power from the power source to the IMD. The sensing element is configured to draw current from the power source of less than or equal to about 1 nA during inactivation, enable an operation interval of the switching circuit, and trigger a first state change in the switching circuit. The switching circuit further is configured to gate power to the IMD upon receipt of a pre-determined number of signals from the sensing element.
24 Citations
22 Claims
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1. An integrated activation system for an implantable medical device (IMD), said activation system and said IMD sharing a power source, said activation system comprising:
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a transistor switching circuit configured to gate power from the power source to the IMD; and a sensing element coupled to said switching circuit, said sensing element configured to; detect a change in a surrounding environment; become activated in response to an initial detected change; draw current from the power source of less than or equal to about 1 nA during inactivation; and enable an operation interval of said switching circuit in response to said initial detected change, said operation interval serving a basis for said switching circuit to determine whether to gate power to the IMD; said switching circuit further configured to monitor sensing element signals during said operation interval; and gate power to the IMD upon receipt of a pre-determined number of sensing element signals within said operation interval. - View Dependent Claims (2, 3, 4, 5, 6, 22)
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7. An integrated activation system for an IMD, said activation system and said IMD sharing a power source, said activation system comprising:
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a switching circuit configured to; gate power from the power source to the IMD; and minimize a voltage drop to the power source while gating power to the IMD; and a sensing element coupled to said switching circuit, said sensing element configured to; detect a change in a surrounding environment; become activated in response to an initial detected change; and enable an operation interval of said switching circuit in response to said initial detected change, said operation interval serving a basis for said switching circuit to determine whether to gate power to the IMD; said switching circuit further configured to monitor sensing element signals during said operation interval; and gate power to the IMD upon receipt of a pre-determined number of sensing element signals within said operation interval.
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8. An implantable medical apparatus comprising:
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a power source; an interface integrated circuit (IC) coupled to said power source, said interface IC comprising; a counter sub-circuit; and a timing sub-circuit configured to establish a first time interval; a gating element coupled to said counter sub-circuit and said timing sub-circuit; a first sensing element coupled to said interface IC, said first sensing element configured to detect a change in a surrounding environment; become activated in response to an initial detected change; and enable said timing sub-circuit to start the first time interval in response to the initial detected change; said counter sub-circuit configured to count first sensing element signal transmissions; and a medical device coupled to said interface IC, said gating element configured to pass current from said power source to power said medical device when said counter sub-circuit counts a pre-determined number of first sensing element signal transmissions within said first time interval. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An integrated activation system for an implantable medical sensor, comprising:
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a power source providing the sole power source to the sensor; a sensor activation circuit coupled between the power source and the sensor and comprising; a transistor switching circuit configured to gate power from the power source to the sensor to toggle the sensor on and off; and a sensing element coupled to said switching circuit, said sensing element configured to enable an operation interval of said switching circuit; said switching circuit further configured to monitor sensing element signals during said operation interval; and gate power to the sensor to turn the sensor on upon receipt of a pre-determined number of sensing element signals within the operation interval.
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Specification