Forty patients undergoing total knee arthroplasty were randomized to receive either hypnosis therapy (HT) with guided hypnosis videos (n=20) or control therapy (CT) with non-hypnosis videos (n=20) for 7 days preoperatively. The primary outcomes were self-reported pain using the Visual Analog Scale (VAS) and functional outcomes using the Knee Injury and Osteoarthritis Outcome Score for Joint Replacement (KOOS JR). Secondary outcomes included postoperative narcotic use measured in morphine milligram equivalents (MME). Outcomes were assessed preoperatively and at 10 and 49 days postoperatively. Overall, the study found no significant differences between the groups in pain scores, functional outcomes, or narcotic use at any time point. The findings suggest that perioperative hypnosis therapy does not provide significant benefits for pain or functional recovery after total knee arthroplasty.