As I read this short article, I was thinking the same thing. If you and I are thinking about it (Clogging up the vascular system), presumably the brains behind this are also thinking about it. If this hurdle can be solved, cool beans. If not, well, it’s back to the drawing board.
Yes if this can be made to work in the real human body it would be fantastic. However it is hard for me with my high school anatomy background to think of a place to deposit this gel safely (where it could do its intended function, I think it would have to be a vascular area) let alone worry about it breaking loose and re-depositing somewhere it shouldn’t be.
But there are so many places that I think it could really mess up the works.