PHILADELPHIA, Oct. 14 /PRNewswire/ -- New study results presented today at the annual meeting of the American Society of Anesthesiologists show that a late-stage clinical candidate for pain relief after surgery provided extended pain relief for 48 hours following hip replacement. The multi-center study, investigating a potential new pain management option, was led by Eugene Viscusi, M.D., director of the Acute Pain Management Service at Thomas Jefferson University Hospital, Philadelphia.