Medical device with an electrically conductive anti-antenna member

摘要

A lead includes a conductor having a distal end and a proximal end and a resonant circuit connected to the conductor. The resonant circuit has a resonance frequency approximately equal to an excitation signal's frequency of a magnetic resonance imaging scanner or a resonance frequency not tuned to an excitation signal's frequency of a magnetic resonance imaging scanner so as to reduce the current flow through a tissue area, thereby reducing tissue damage. The resonant circuit may be included in an adapter that provides an electrical bridge between a lead a medical device such as an electrode, sensor, or signal generator. The resonant circuit may also be included directly in the housing of a medical device.

主权项

1. An implantable adapter for coupling an implantable lead to an implantable medical device, the adapter comprising:
a housing of the implantable adapter configured at a first end to form a first mechanical connector to provide a reversible mechanical connection to a proximal end of the implantable lead and configured at a second end to form a second mechanical connector to provide a reversible mechanical connection to the implantable medical device, wherein the implantable medical device comprises an implantable medical device housing separate from the housing of the implantable adapter; a first resonant circuit within the housing of the implantable adapter, the first resonant circuit having a resonance frequency approximately equal to a frequency of a first electromagnetic radiation source; a second resonant circuit within the housing of the implantable adapter and connected in series with the first resonant circuit, the second resonant circuit having a resonance frequency approximately equal to a frequency of a second electromagnetic radiation source; a first wire within the housing of the implantable adapter to electrically connect a first wire of the implantable lead to the first resonant circuit; and a second wire within the housing of the implantable adapter to electrically connect the second resonant circuit to the implantable medical device.