Patent ID: 7604617

Claim:
A medical device comprising: a housing body having a longitudinal peripheral surface defining a substantially uniform lateral dimension configured for subcutaneous implantation by surgical tunneling; a stud projecting longitudinally from said housing body configured for percutaneous implantation having an inner end adjacent to said housing body and an outer end spaced longitudinally therefrom to define a longitudinal peripheral surface; a shoulder surface on said housing body extending laterally from said housing body longitudinal peripheral surface to said stud longitudinal peripheral surface; a laterally extending first porous layer carried by said shoulder surface having a lateral dimension no greater than said housing body lateral dimension; a second porous layer carried by said stud longitudinal peripheral surface extending longitudinally from said first porous layer and terminating inwardly of said stud outer end, said second porous layer having a lateral dimension no greater than said housing body lateral dimension; and wherein said first and said second porous layers orthogonally abut one another and wherein each of said porous layers is characterized by a pore size within the range of 50 to 200 microns with a porosity of between 60 to 95% for promoting soft tissue ingrowth.