MRI-compatible implantable device

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.

1 - 40 . (canceled) 
     
     
         41 . A band stop filter for an implantable lead wire of an active implantable medical device, which comprises:
 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.   
     
     
         42 . The band stop filter of  claim 41 , wherein the Q of the inductor is relatively high and the Q of the capacitor is relatively low to select the overall Q of the band stop filter. 
     
     
         43 . The band stop filter of  claim 42 , wherein the inductor has a relatively low resistive loss; and wherein the capacitor has a relatively high equivalent series resistance. 
     
     
         44 . The band stop filter of  claim 43 , wherein the overall Q of the band stop filter is selected to attenuate current flow through the lead wire along a range of selected frequencies. 
     
     
         45 . The band stop filter of  claim 44 , wherein the range of selected frequencies includes a plurality of MRI pulsed frequencies. 
     
     
         46 . The band stop filter of  claim 44 , wherein the range of selected frequencies includes an MRI pulsed frequency. 
     
     
         47 . The band stop filter of  claim 41 , wherein the band stop filter is disposed adjacent to a distal tip of the lead wire. 
     
     
         48 . The band stop filter of  claim 41 , wherein the band stop filter is disposed adjacent an electrode. 
     
     
         49 . The band stop filter of  claim 47  or  48 , wherein the band stop filter is connected into a tip electrode. 
     
     
         50 . The band stop filter of  claim 47  or  48 , wherein the band stop filter is connected into at least one of a TIP electrode and a RING electrode. 
     
     
         51 . A band stop filter for a medical diagnostic or therapeutic device comprising:
 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.   
     
     
         52 . The band stop filter of  claim 51 , wherein the Q of the inductor is relatively high and the Q of the capacitor is relatively low to select the overall Q of the band stop filter. 
     
     
         53 . The band stop filter of  claim 52 , wherein the inductor has a relatively low resistive loss. 
     
     
         54 . The band stop filter of  claim 52 , wherein the capacitor has a relatively high equivalent series resistance. 
     
     
         55 . The band stop filter of  claim 52 , wherein the overall Q of the band stop filter is selected to attenuate current flow through the lead wire along a range of selected frequencies. 
     
     
         56 . The band stop filter of  claim 55 , wherein the range of selected frequencies includes a plurality of MRI pulsed frequencies. 
     
     
         57 . The band stop filter of  claim 55 , wherein the range of selected frequencies includes an MRI pulsed frequency. 
     
     
         58 . The band stop filter of  claim 51 , wherein the band stop filter is disposed adjacent to the distal tip of the implantable lead wire. 
     
     
         59 . The band stop filter of  claim 51 , wherein the band stop filter is disposed adjacent an electrode. 
     
     
         60 . The band stop filter of  claim 58  or  59 , wherein the band stop filter is connected into a tip electrode. 
     
     
         61 . The band stop filter of  claim 58  or  59 , wherein the band stop filter is connected into at least one of a TIP electrode and a RING electrode. 
     
     
         62 . The band stop filter of  claim 60 , wherein the overall Q of the band stop filter is selected to attenuate current flow through the implantable lead wire along a range of selected frequencies. 
     
     
         63 . The band stop filter of  claim 51 , wherein the implantable medical device is selected from the group consisting of cardiac pacemakers and implantable cardioverter defibrillators. 
     
     
         64 . The band stop filter of  claim 51 , wherein the implantable medical device is selected from the group consisting of implantable pulse generators, cardioverter/defibrillator/pacemakers and pacemakers. 
     
     
         65 . The band stop filter of  claim 51 , wherein the implantable medical device is selected from the group consisting of neurostimulators, cardiac pacemakers, gastric stimulators and implantable cardioverter defibrillators. 
     
     
         66 . The band stop filter of  claim 51 , wherein the implantable medical device is selected from the group consisting of implantable pulse generators, cardioverter/defibrillator/pacemakers, pacemakers, neurological stimulators and gastrointestinal stimulators. 
     
     
         67 . The band stop filter of  claim 51 , wherein the overall Q of the band stop filter is selected to balance impedance at the selected frequency verses frequency band width characteristics. 
     
     
         68 . The band stop filter of  claim 51 , wherein the overall Q of the band stop filter is selected to balance a desired current flow verses specified frequencies. 
     
     
         69 . The band stop filter of  claim 51 , wherein the Q of the band stop filter is selected to provide a desired current flow at specified frequencies. 
     
     
         70 . A band stop filter for an implantable lead wire of an active implantable medical device, which comprises:
 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.   
     
     
         71 . The band stop filter of  claim 70 , wherein the Q of the inductor is relatively high and the Q of the capacitor is relatively low to select the overall Q of the band stop filter. 
     
     
         72 . The band stop filter of  claim 71 , wherein the inductor has a relatively low resistive loss; and wherein the capacitor has a relatively high equivalent series resistance. 
     
     
         73 . The band stop filter of  claim 72 , wherein the overall Q of the band stop filter is selected to attenuate current flow through the lead wires along a range of selected frequencies. 
     
     
         74 . The band stop filter of  claim 73 , wherein the range of selected frequencies includes a plurality of MRI pulsed frequencies. 
     
     
         75 . The band stop filter of  claim 73 , wherein the range of selected frequencies includes an MRI pulsed frequency. 
     
     
         76 . The band stop filter of  claim 70 , wherein the band stop filter is disposed adjacent to a distal tip of a lead wire. 
     
     
         77 . The band stop filter of  claim 70 , wherein the band stop filter is disposed within the path of the leads adjacent an electrode. 
     
     
         78 . The band stop filter of  claim 76  or  77 , wherein the band stop filter is connected into a tip electrode. 
     
     
         79 . The band stop filter of  claim 76  or  77 , wherein the band stop filter is connected into at least one of a TIP electrode and a RING electrode. 
     
     
         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.   
     
     
         81 . The band stop filter of  claim 80 , wherein the Q of the inductor is relatively high and the Q of the capacitor is relatively low to select the overall Q of the band stop filter. 
     
     
         82 . The band stop filter of  claim 81 , wherein the inductor has a relatively low resistive loss. 
     
     
         83 . The band stop filter of  claim 81 , wherein the capacitor has a relatively high equivalent series resistance. 
     
     
         84 . The band stop filter of  claim 81 , wherein the overall Q of the band stop filter is selected to attenuate current flow through the lead wire along a range of selected frequencies. 
     
     
         85 . The band stop filter of  claim 84 , wherein the range of selected frequencies includes a plurality of MRI pulsed frequencies. 
     
     
         86 . The band stop filter of  claim 84 , wherein the range of selected frequencies includes an MRI pulsed frequency. 
     
     
         87 . The band stop filter of  claim 80 , wherein the band stop filter is disposed adjacent to the distal tip of an implantable lead wire. 
     
     
         88 . The band stop filter of  claim 80 , wherein the band stop filter is disposed within the path of the leads adjacent an electrode 
     
     
         89 . The band stop filter of  claim 87  or  88 , wherein the band stop filter is connected into a tip electrode. 
     
     
         90 . The band stop filter of  claim 87  or  88 , wherein the band stop filter is connected into at least one of a TIP electrode and a RING electrode. 
     
     
         91 . The band stop filter of  claim 89 , wherein the overall Q of the band stop filter is selected to attenuate current flow through the implantable lead wire along a range of selected frequencies. 
     
     
         92 . The band stop filter of  claim 80 , wherein the implantable medical device is selected from the group consisting of cardiac pacemakers and implantable cardioverter defibrillators. 
     
     
         93 . The band stop filter of  claim 80 , wherein the implantable medical device is selected from the group consisting of implantable pulse generators, cardioverter/defibrillator/pacemakers and pacemakers. 
     
     
         94 . The band stop filter of  claim 80 , wherein the implantable medical device is selected from the group consisting of neurostimulators, cardiac pacemakers, gastric stimulators and implantable cardioverter defibrillators. 
     
     
         95 . The band stop filter of  claim 80 , wherein the implantable medical device is selected from the group consisting of implantable pulse generators, cardioverter/defibrillator/pacemakers, pacemakers, neurological stimulators and gastrointestinal stimulators. 
     
     
         96 . The band stop filter of  claim 80 , wherein the overall Q of the band stop filter is selected to balance impedance at the selected frequency verses frequency band width characteristics. 
     
     
         97 . The band stop filter of  claim 80 , wherein the overall Q of the band stop filter is selected to balance a desired current flow verses specified frequencies. 
     
     
         98 . The band stop filter of  claim 80 , wherein the Q of the band stop filter is selected to provide a desired current flow at specified frequencies. 
     
     
         99 . A filter for implantable lead wires of an active implantable medical device, which comprises:
 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.   
     
     
         100 . The filter of  claim 99 , wherein the Q of the inductor is relatively high and the Q of the capacitor is relatively low to select the overall Q of the filter. 
     
     
         101 . The filter of  claim 100 , wherein the inductor has a relatively low resistive loss; and wherein the capacitor has a relatively high equivalent series resistance. 
     
     
         102 . The filter of  claim 101 , wherein the overall Q of the filter is selected to attenuate current flow through the lead wires along a range of selected frequencies. 
     
     
         103 . The filter of  claim 102 , wherein the range of selected frequencies includes a plurality of MRI pulsed frequencies. 
     
     
         104 . The filter of  claim 102 , wherein the range of selected frequencies includes an MRI pulsed frequency. 
     
     
         105 . The filter of  claim 99 , wherein the filter is disposed adjacent to a distal tip of a lead wire. 
     
     
         106 . The filter of  claim 99 , wherein the filter is disposed within the path of the leads adjacent an electrode. 
     
     
         107 . The filter of  claim 105  or  106 , wherein the filter is connected into a tip electrode. 
     
     
         108 . The filter of  claim 105  or  106 , wherein the filter is connected into at least one of a TIP electrode and a RING electrode. 
     
     
         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.   
     
     
         110 . The filter of  claim 109 , wherein the Q of the inductor is relatively high and the Q of the capacitor is relatively low to select the overall Q of the filter. 
     
     
         111 . The filter of  claim 110 , wherein the inductor has a relatively low resistive loss. 
     
     
         112 . The filter of  claim 110 , wherein the capacitor has a relatively high equivalent series resistance. 
     
     
         113 . The filter of  claim 110 , wherein the overall Q of the filter is selected to attenuate current flow through the lead wires along a range of selected frequencies. 
     
     
         114 . The filter of  claim 113 , wherein the range of selected frequencies includes a plurality of MRI pulsed frequencies. 
     
     
         115 . The filter of  claim 113 , wherein the range of selected frequencies includes an MRI pulsed frequency. 
     
     
         116 . The filter of  claim 109 , wherein the filter is disposed adjacent to the distal tip of an implantable lead wire. 
     
     
         117 . The filter of  claim 109 , wherein the filter is disposed within the path of the leads adjacent an electrode. 
     
     
         118 . The filter of  claim 116  or  117 , wherein the filter is connected into a tip electrode. 
     
     
         119 . The filter of  claim 116  or  117 , wherein the filter is connected into at least one of a TIP electrode and a RING electrode. 
     
     
         120 . The filter of  claim 118 , wherein the overall Q of the filter is selected to attenuate current flow through an implantable lead wire along a range of selected frequencies. 
     
     
         121 . The filter of  claim 109 , wherein the implantable medical device is selected from the group consisting of cardiac pacemakers and implantable cardioverter defibrillators. 
     
     
         122 . The filter of  claim 109 , wherein the implantable medical device is selected from the group consisting of implantable pulse generators, cardioverter/defibrillator/pacemakers and pacemakers. 
     
     
         123 . The filter of  claim 109 , wherein the implantable medical device is selected from the group consisting of neurostimulators, cardiac pacemakers, gastric stimulators and implantable cardioverter defibrillators. 
     
     
         124 . The filter of  claim 109 , wherein the implantable medical device is selected from the group consisting of implantable pulse generators, cardioverter/defibrillator/pacemakers, pacemakers, neurological stimulators and gastrointestinal stimulators. 
     
     
         125 . The filter of  claim 109 , wherein the overall Q of the filter is selected to balance impedance at the selected frequency verses frequency band width characteristics. 
     
     
         126 . The filter of  claim 109 , wherein the overall Q of the filter is selected to balance a desired current flow verses specified frequencies. 
     
     
         127 . The filter of  claim 109 , wherein the Q of the filter is selected to provide a desired current flow at specified frequencies. 
     
     
         128 . The band stop filter of  claim 61 , wherein the overall Q of the band stop filter is selected to attenuate current flow through the implantable lead wire along a range of selected frequencies. 
     
     
         129 . The band stop filter of  claim 90 , wherein the overall Q of the band stop filter is selected to attenuate current flow through an implantable lead wire along a range of selected frequencies. 
     
     
         130 . The filter of  claim 119 , wherein the overall Q of the filter is selected to attenuate current flow through an implantable lead wire along a range of selected frequencies.