Overview The Role of Synovitis in Osteoarthritis Status: Recruiting Trial end date: 2020-03-01 Target enrollment: Participant gender: Summary To determine whether platelet-rich-plasma (PRP) or HA (hyaluronic acid)injection into synovitis in osteoarthritis(OA) knee can achieve improvement in knee function and reduce synovitis. Phase: N/A Details Lead Sponsor: Taipei Veterans General Hospital, TaiwanTreatments: Hyaluronic Acid