Maybe everyone is too young to have had a joint replacement. Tore knee cartilage while at work in 84. After several scopes along the years, had a knee replacement in 2002. Had to go to a pre-op class, where they told you all about what to expect in surgery & recovery. My Doc told me to donate a unit of blood before surgery. At the class the nurse told us that this would be a "bloodless surgery." Had to ask, if it's bloodless, why am I donating a unit of blood before surgery? She said that it's called "bloodless," because they put a very tight tourniquet near your groin, so there is very little blood during surgery. BUT, when they remove the tourniquet "you're going to bleed like hell!" Now, almost 17 years later, it's still holding together.