Compression ultrasonography for the detection of deep venous thrombosis in patients who have a fracture of the hip. A prospective study.

Incidence of deep vein thrombosis after varicose vein surgery

“…The diagnosis of DVT was made on clinical grounds, although all were confirmed by venography 1,6 . The high proportion of asymptomatic DVTs detected in the present and other 4,7 studies demonstrates the lack of sensitivity of clinical assessment alone in diagnosing DVT. Of the patients who received additional sclerotherapy in this study, 8 per cent developed DVT; all of these DVTs were asymptomatic, reinforcing that clinical assessment should not be relied upon.…”

Duplex Ultrasound for Thromboembolism

“…30 The sensitivity of detecting asymptomatic calf DVT is lower and ranges from 33% to 58%. 1,9,11,17 These findings reinforce the importance of experienced sonographers in making an accurate diagnosis.…”

The Diagnostic Approach to Acute Venous Thromboembolism

“…Without prophylaxis, the risk of DVT is approximately 50% after total hip replacement and as high as 65% after total knee replacement (89). Prospective clinical trials enrolling consecutive patients and using previously established objective criteria for CV and US with independent, blinded comparisons of the two techniques were assessed (level 1 trials) (43,68,(90)(91)(92)(93)(94)(95)(96)(97)(98). Other studies were deemed level 2 (76,(99)(100)(101)(102).…”