A new study shows the elderly might be getting around better than 20 years ago.
Back then, knee replacement surgery was a relatively new procedure--but now it's on the rise.
A new study to be published in the Journal of American Medical Association showed out of three million Medicare patients, 300,000 underwent knee revision procedure.
Researchers say while the surgery is safe, it's also expensive--- averaging 15-thousand dollars.
There is also an increase in re-admission rates, and among knee revision patients infection rates also increased.