摘要:
A shielded component or network for an active medical device (AMD) implantable lead includes (1) an implantable lead having a length extending from a proximal end to a distal end, all external of an AMD housing, (2) a passive component or network disposed somewhere along the length of the implantable lead, the passive component or network including at least one inductive component having a first inductive value, and (3) an electromagnetic shield substantially surrounding the inductive component or the passive network. The first inductive value of the inductive component is adjusted to a account for a shift in its inductance to a second inductive value when shielded.
摘要:
An energy management system that facilitates the transfer of high frequency energy induced on an implanted lead or a leadwire includes an energy dissipating surface associated with the implanted lead or the leadwire, a diversion or diverter circuit associated with the energy dissipating surface, and at least one non-linear circuit element switch for diverting energy in the implanted lead or the leadwire through the diversion circuit to the energy dissipating surface. In alternate configurations, the switch may be disposed between the implanted lead or the leadwire and the diversion circuit, or disposed so that it electrically opens the implanted lead or the leadwire when diverting energy through the diversion circuit to the energy dissipating surface. The non-linear circuit element switch is typically a PIN diode. The diversion circuit may be either a high pass filter or a low pass filter.
摘要:
An energy management system that facilitates the transfer of high frequency energy induced on an implanted lead or a leadwire includes an energy dissipating surface associated with the implanted lead or the leadwire, a diversion or diverter circuit associated with the energy dissipating surface, and at least one switch for diverting energy in the implanted lead or the leadwire through the diversion circuit to the energy dissipating surface. In alternate configurations, the switch may be disposed between the implanted lead or the leadwire and the diversion circuit, or disposed so that it electrically opens the implanted lead or the leadwire when diverting energy through the diversion circuit to the energy dissipating surface. The switch may comprise a single or multi-pole double or single throw switch. The diversion circuit may be either a high pass filter or a low pass filter.
摘要:
A lead extending exteriorly from an active implantable medical device (AIMD) is at least partially ensheathed within an electromagnetic interference (EMI) shield. The AIMD has a conductive equipotential surface to which the EMI shield may be conductively coupled. An impeding circuit may be provided for raising the high frequency impedance of the lead. An energy diversion circuit may also be provided for conductively coupling the lead to the EMI shield.
摘要:
An energy management system facilitates the transfer of high frequency energy coupled into an implanted lead at a selected RF frequency or frequency band, to an energy dissipating surface. This is accomplished by conductively coupling the implanted lead to the energy dissipating surface through an energy diversion circuit including one or more passive electronic network components whose impedance characteristics are at least partially tuned to the implanted lead's impedance characteristics.
摘要:
An energy management system that facilitates the transfer of high frequency energy induced on an implanted lead or a leadwire includes an energy dissipating surface associated with the implanted lead or the leadwire, a diversion or diverter circuit associated with the energy dissipating surface, and at least one non-linear circuit element switch for diverting energy in the implanted lead or the leadwire through the diversion circuit to the energy dissipating surface. In alternate configurations, the switch may be disposed between the implanted lead or the leadwire and the diversion circuit, or disposed so that it electrically opens the implanted lead or the leadwire when diverting energy through the diversion circuit to the energy dissipating surface. The non-linear circuit element switch is typically a PIN diode. The diversion circuit may be either a high pass filter or a low pass filter.
摘要:
An energy management system that facilitates the transfer of high frequency energy induced on an implanted lead or a leadwire includes an energy dissipating surface associated with the implanted lead or the leadwire, a diversion or diverter circuit associated with the energy dissipating surface, and at least one switch for diverting energy in the implanted lead or the leadwire through the diversion circuit to the energy dissipating surface. In alternate configurations, the switch may be disposed between the implanted lead or the leadwire and the diversion circuit, or disposed so that it electrically opens the implanted lead or the leadwire when diverting energy through the diversion circuit to the energy dissipating surface. The switch may comprise a single or multi-pole double or single throw switch. The diversion circuit may be either a high pass filter or a low pass filter.
摘要:
An identification device for an implantable lead includes an associated implantable sleeve and a radio frequency identification device (RFID) tag associated with the sleeve. The RFID tag includes information relating to the implantable lead, its associated lead system, or an associated implantable medical device. The RFID tag may be hermetically sealed within the sleeve and the sleeve selectively fixed along a length of the lead. The sleeve may comprise a loop forming an aperture, a crimped clamp device, a clamp device including a ratchet, clip, or rivet mechanism, or a clamp device including two separate clamshells, all of which allow for secure attachment to the lead. Alternatively, the sleeve may integrally be formed as part of the lead between a lead conductor and an insulated lumen. An external interrogator may be used for identifying information contained within the RFID tag.
摘要:
An identification device for an implantable lead includes an associated implantable sleeve and a radio frequency identification device (RFID) tag associated with the sleeve. The RFID tag includes information relating to the implantable lead, its associated lead system, or an associated implantable medical device. The RFID tag may be hermetically sealed within the sleeve and the sleeve selectively fixed along a length of the lead. The sleeve may comprise a loop forming an aperture, a crimped clamp device, a clamp device including a ratchet, clip, or rivet mechanism, or a clamp device including two separate clamshells, all of which allow for secure attachment to the lead. Alternatively, the sleeve may integrally be formed as part of the lead between a lead conductor and an insulated lumen. An external interrogator may be used for identifying information contained within the RFID tag.
摘要:
An RFID tag is disposed within a hermetically sealed housing of an IMD. Low frequency RFID interrogators and tags are used, and the housing walls are made of materials, and/or are reduced in thickness, to facilitate RF communication between the RFID tag and an RFID reader/interrogator programmer. An RFID reader/interrogator may be used which has a limited transmit time and time-out period to avoid interference with the operation of the IMD.