Andreessen Horowitz (a16z) has a new fund that may be what you are looking for. Its a small fund (about $250MM), that is primarily looking for early stage health-tech opportunities. You can take a look at the fireside we recently did with Scott Kupor, the COO and Managing Partner of a16z, where we briefly touched on the new fund and its focus.
Sounds as though you have something very interesting, and hope that this lead helps and that you are able to finish out your round quickly! Here is the link https://livestream.com/pemo/scottkupor