The recovery from knee replacement surgery often involves a significant amount of pain. The
best way to prevent/treat this pain is unknown. This study will compare two accepted methods
of pain control in order to determine which is superior. The first method involves the
injection of a solution containing multiple medications into the knee joint at the time of
surgery. The second method involves the placement of a catheter adjacent to the femoral nerve
which senses pain from the knee. This catheter is used to deliver local anesthetic which
serves to block the transmission of pain signals from the nerve. The catheter will be left in
place until 2 days after surgery. This method is combined with injection of local anesthetic
in a particular area of the knee joint at the time of surgery. Patients will be followed
until 2 days after surgery in order to determine which method is superior. We believe the
second method will be deemed superior.