Even with prophylaxis, hip arthroplasty patients carry an overall rate of DVT of 10% to 15% (proximal DVT 3% to 7%) as determined by routine venography at the time of discharge.

[2] The clinical diagnosis of deep vein thrombosis is very difficult to ... replacement patients (508 hips and 518 knees) on warfarin prophylaxis (average 9 days) to duplex ultrasound compression ...