@Rosco true necrosis is an issue, but this is not a bad idea for temporary moving of power and data… like snap it on, move your shit… 5 mins max maybe? … then snap it off and walk… could be nice actually.
Absolutely… worked on some coatings once… the bottom line here is that skin is your barrier to infection, and now you want to put a permanent hole in it. The only way TDs are going to work long term is if there is a way to get the skin and tissue to literally bond with the metal or substrate coming out in a way that is actually sealed, not just kinda grown into, but sealed to the point where the skin is acting as a microbial barrier.
That, or trick the body into growing a different kind of tissue structure around the transdermal… something like how gums grow around teeth. Your gums are constantly trying to close up around your teeth, and the way they interface with and grow into the roots sets up a battleground for the constant march of microbes into that space… the body knows it can’t form an actual seal, so it puts the tissue structures to work to trap and kill them… but it is a constant battle waged there… so unless you can get your skin to act the same way, the skin will eventually lose and the device will be rejected as its surface is inundated with invadors, many of which will set up biofilms and other protective measures to establish even stronger surface colonies… it’s called “biofouling” and it is one serous reason why implants must have specific surface qualities. Even a fully implanted, covered, and encapsulated implant can serve as a colonization point for random bacteria floating around in our body… particularly staph… which is everywhere on and inside us.
When a staph bacterium attaches to the surface of an implant, if the surface allows proliferation, that bacterium will go about establishing a colony and producing biofilm over-top of that colony to hide and protect itself from the body’s defenses… until the colony is so large it’s producing a ton of effluent (waste) which often causes certain symptoms in the body, and then the white blood cells go on the hunt… but honestly biofilms that protect colonies are very hard to get through, especially on implantable devices… this is why pacemakers and other implants (usually titanium but also plastics) sometimes have to be removed after only a few years… because the surface has “fouled” and is covered in a giant colony of bacterium… all pumping out crap proteins and other garbage that can make you very ill or even kill you.
Anyway… transdermals are hard.