As a nurse I agree with the making sure you have no infections ,anywhere. The Md's at our hospital put drains in the knee
that allow them to give you your own blood back. They put you on a constant motion machine to give you some bend
before the numbing wears off. If you have a block you do not wake in pain and the numbing is long lasting. We also give
polar care(automatic icing machines) that reduce pain and swelling. My dad was told by the salesman who sold joints not to have anyone do it that did not do 100 total joints a year. My dad did great and was back hunting,golfing and fishing. Good luck and God bless!