It's obviously a hard problem. As someone who used to do dialysis-access operations (AV fistulas/AV shunts), just looking at their diagram and seeing 3 locatio

It's obviously a hard problem. As someone who used to do dialysis-access operations (AV fistulas/AV shunts), just looking at their diagram and seeing 3 location with a plastic::tissue interface (artery, vein, bladder) is a massive hurdle alone. The connection between the artery and the device will stenose, the connection between the vein and the device will clot (despite whatever is in the press release, I can guarantee it will). And then exposing the entire apparatus to the bladder - it will get infected, and then the whole thing needs to be removed. So, even if they got the actual device perfect, the realities of interfacing that with an actual person, for any reasonable length of time... Don't hold your breath. This is why kidney transplant is so great... it's all real tissue, even if you need lifelong antisuppression.