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Although lead compounds can be good insulators, pure lead is a metal that conducts electricity, making it a poor insulator. Lead’s resistivity is 22 billionths of an ohm-meter. It sees use in electrical contacts because, being a relatively soft metal, it deforms easily when tightened and makes a solid connection.
Sheath with integrated conductive wire
Sheaths and methods of making sheaths are disclosed. An example sheath includes an elongated shaft defining a lumen along a longitudinal axis and having a distal section opposite a proximal section. The elongated shaft includes an outermost elongated support member coaxial with the lumen. The support member includes an outer side. A lead conductor is wrapped around the outer side of the support member at the distal section. A cover member is disposed over the lead conductor and the support member, the cover member and the lead conductor. A conductive portion of the lead conductor is exposed at a selected axial location in the distal section. An electrode is swaged against the cover member at the selected axial location and is electrically connected with the exposed conductive portion via mechanical compression.
Owner:BOSTON SCIENTIFIC SCIMED INC