Standard skin sterilization, prepping, and draping will be applied to the area. Under ultrasound guidance the needle will be advanced into the adductor canal. After negative aspiration, a bolus of 20 ml 0.5% Ropivacaine will be injected under direct visualization in 5 mL aliquots ensuring proper placement of the needle tip. The catheter will be advanced in this position at least 2 cm and not more than 5 cm and secured to the skin with tegaderm. Patients will be evaluated immediately post-operatively in the PACU (Post anesthesia care unit) to determine VAS score from 0-10.