If the article went into detail about the man’s injury, we could probably figure that one out.
As far as “experiments” go, I’m sure the first artificial heart installation was thought of as an experiment by some. All drug trials, including those involving humans, are basically experiments as well.
Once that's taken care of and the leg is shorter, they can plug the foot back in ~ probably by putting in a steel prosthetic device giving him his previous leg length and pulling sinews, muscles and blood vessels down to meet the foot.
It sounds remarkably like that technique the Russians worked out to STRETCH LEGS for very short people.
The solution is to open the eye up, zap the outer margins of the retina on the inside toward the macula ALL the way around.
You end up losing about half your retinal tissue, but you save the macula (the central vision part).
Before that, you of course place a scaleric band around the eye to compress it a bit causing a ring of tissue to pop up all around the inside, and the retina will reattach to that ring.
A little loss here and there up against the benefit of retaining eyesight ~ that's the game there. This man's surgeons are playing the same one. He may end up with two good legs, or one.
This is a blessing not available in ancient times.