| 摘要 |
This document discusses, among other things, a lead assembly including a porous polyethylene cover. In an example, the cover includes sections that have differing pore sizes. In an example, a section of the cover near a distal end portion of a lead assembly includes pores that are large enough to allow tissue ingrowth. In another example, a lead assembly includes two or more polyethylene covers having different porosities.
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