MRI-compatible implantable device
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Accused Products
Abstract
A medical device containing a device for connecting the medical device to a substrate, for furnishing electrical impulses from the medical device to the substrate, for ceasing the furnishing of electrical impulses to the substrate, for receiving pulsed radio frequency fields, for transmitting and receiving optical signals, and for protecting the substrate and the medical device from currents induced by the pulsed radio frequency fields. The medical device contains a control circuit comprised of a parallel resonant frequency circuit.
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Citations
130 Claims
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1-40. -40. (canceled)
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41. A band stop filter for an implantable lead wire of an active implantable medical device, which comprises:
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a) a lead wire having a length extending between and to a proximal end and a distal end; and b) at least one band stop filter comprising a capacitor in parallel with an inductor, said parallel capacitor and inductor combination placed in series with the lead wire somewhere along the length between and to the proximal end and the distal end of the lead wire wherein values of capacitance and inductance have been selected such that the band stop filter is resonant at a selected frequency and further wherein the overall Q of the band stop filter is selected to balance impedance at the selected frequency verses frequency band width characteristics. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50)
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51. A band stop filter for a medical diagnostic or therapeutic device comprising:
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an active implantable medical device and an implantable lead wire having a length extending therefrom between and to a proximal end and a distal end and adapted to be in contact with biological cells, the band stop filter comprising; at least one band stop filter associated with the lead wire, for attenuating current flow through the lead wire at a selected frequency, wherein the band stop filter comprises a capacitor in parallel with an inductor, said parallel capacitor and inductor placed in series with the lead wire somewhere along the length between and to the proximal end and the distal end of the lead wire; wherein values of capacitance and inductance are selected such that the band stop filter is resonant at the selected frequency. - View Dependent Claims (52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 128)
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70. A band stop filter for an implantable lead wire of an active implantable medical device, which comprises:
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a) lead wires each having a length extending between and to a proximal end and a distal end; and b) at least one band stop filter comprising a capacitor and an inductor to provide a parallel-resonant circuit, said capacitor and inductor placed in the path of the lead wires somewhere along their length between and to the proximal ends and the distal ends of the lead wires wherein values of capacitance and inductance have been selected such that the band stop filter is resonant at a selected frequency and further wherein the overall Q of the band stop filter is selected to balance impedance at the selected frequency verses frequency band width characteristics. - View Dependent Claims (71, 72, 73, 74, 75, 76, 77, 78, 79)
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80. A band stop filter for a medical diagnostic or therapeutic device comprising
an active implantable medical device and implantable lead wires each having a length extending therefrom between and to a proximal end and a distal end and adapted to be in contact with biological cells, the band stop filter comprising: -
at least one band stop filter associated with the lead wires, for attenuating current flow through the lead wires at a selected frequency, wherein the band stop filter comprises a capacitor and an inductor to provide a parallel-resonant circuit, said capacitor and inductor placed in the path of the lead wires somewhere along their length between and to the proximal ends and the distal ends of the lead wires wherein values of capacitance and inductance are selected such that the band stop filter is resonant at the selected frequency. - View Dependent Claims (81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 129)
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99. A filter for implantable lead wires of an active implantable medical device, which comprises:
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lead wires each having a length extending between and to a proximal end and a distal end; and at least one filter comprising a parallel-resonant circuit including a capacitor and an inductor, said parallel-resonant circuit placed within the path of the leads; wherein values of capacitance and inductance have been selected such that the filter is resonant at a selected frequency; and further wherein the Q of the filter is selected to provide the desired current flow, or lack thereof, at specified frequencies. - View Dependent Claims (100, 101, 102, 103, 104, 105, 106, 107, 108)
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109. A filter for a medical diagnostic or therapeutic device comprising
an active implantable medical device and implantable lead wires each having a length extending therefrom between and to a proximal end and a distal end and adapted to be in contact with biological cells, the filter comprising: -
at least one filter associated with the lead wires, for attenuating current flow through the lead wires at a selected frequency, wherein the filter comprises a parallel-resonant circuit including a capacitor and an inductor, said parallel-resonant circuit placed within the path of the lead wires; wherein values of capacitance and inductance are selected such that the filter is resonant at the selected frequency. - View Dependent Claims (110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 130)
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Specification