The SPAARK Trial (VIDEO) University of Oxford This video is under embargo. Please login to access this video. Caption The SPAARK Trial explored whether liposomal bupivacaine was an effective a post-operative pain treatment for knee-replacement Credit Emma Jackson Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.