DISCONTINUOUS CONDUCTIVE FILLER POLYMER-MATRIX COMPOSITES FOR ELECTROMAGNETIC SHIELDING

摘要

A medical electrical lead having a conductor assembly covered by an insulating layer, and a shield covering positioned adjacent or proximate to at least a portion of the insulating layer in order to shield the conductor assembly from one or more electromagnetic fields. The shield covering is formed of a polymer-matrix composite. The polymer-matrix composite includes a polymeric resin having discontinuous conductive fillers provided therein. The discontinuous conductive fillers include one or more of nano-sized metal structures and nano-sized non-metallic conductive structures. The nano-sized non-metallic conductive structures can have a coating formed of one or more metals. The nano-sized non-metallic conductive structures can be formed of carbon. In turn, the nano-sized non-metallic conductive structures can include one or more of carbon nanofibers, carbon filaments, carbon nanotubes, and carbon nanoflakes.

主权项

1. A medical electrical lead, comprising:
a conductor assembly having one or more conductors covered by an insulating layer; and a shield covering adjacent or proximate to at least a portion of the insulating layer to shield the conductors from one or more electromagnetic fields, the shield covering comprising a polymer-matrix composite, the polymer-matrix composite including a polymeric resin having discontinuous conductive fillers provided therein, the discontinuous conductive fillers comprising one or more of nano-sized metal structures and nano-sized non-metallic conductive structures.