Tank filters placed in series with the lead wires or circuits of active medical devices to enhance MRI compatibility
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United States of America Patent
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May 17, 2011
Issued Date -
N/A
app pub date -
Nov 9, 2006
filing date -
Nov 11, 2005
priority date (Note) -
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Abstract
A TANK filter is provided for a lead wire of an active medical device (AMD). The TANK filter includes a capacitor in parallel with an inductor. The parallel capacitor and inductor are placed in series with the lead wire of the AMD, wherein values of capacitance and inductance are selected such that the TANK filter is resonant at a selected frequency. The Q of the inductor may be relatively maximized and the Q of the capacitor may be relatively minimized to reduce the overall Q of the TANK filter to attenuate current flow through the lead wire along a range of selected frequencies. In a preferred form, the TANK filter is integrated into a TIP and/or RING electrode for an active implantable medical device.
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