A total of 56 patients with knee arthritis with joint effusion who were admitted in Vinayaka Mission Kirupananda Variyar Medical College and Hospital, Salem and those who attended the orthopaedic outpatient clinic during the period of October 2011 to March 2012 have been included in this study. There were 14 Rheumatoid Arthritis (RA), 7 Crystal induced arthritis, 3 Septic arthritis and 32 Osteoarthritis