Early detection and treatment of deep vein thrombosis are important in total hip and knee arthroplasty to reduce the risks of pulmonary embolism. We performed preoperative color Doppler ultrasound for rheumatoid arthritis patients who underwent performed total knee arthroplasty. DVTs were found in 16.8% preoperation and 12.3% post-operation. One risk factor found in examination was obesity.
