Percutaneously implantable medical device configured to promote tissue ingrowth

A method of configuring a medical device for implantation by surgical tunneling from a proximal site to a distal site, said method comprising:

• providing a housing body having a longitudinal peripheral surface defining a substantially uniform lateral dimension suitable for subcutaneous implantation by surgical tunneling from said proximal site;
• providing a longitudinal stud projecting distally from said housing body, said stud having an inner end adjacent to said housing body and an outer end spaced longitudinally therefrom and defining a longitudinal peripheral surface;
• providing a shoulder surface extending laterally from said housing body peripheral surface to said stud longitudinal peripheral surface;
• forming a lateral porous layer on said shoulder surface having a lateral dimension no greater than said housing body lateral dimension and where said lateral porous layer 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;
• forming a longitudinal porous layer on said stud peripheral surface having a lateral dimension no greater than said housing body lateral dimension and where said longitudinal porous layer extends from said lateral porous layer to a location longitudinally inward of said stud outer end and 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;
• and
• positioning said longitudinal porous layer to orthogonally abut said lateral porous layer proximate to said shoulder surface.