Why the study?
Does ultrasound provide accurate diagnosis of lower limb deep venous thrombosis compared to contrast venography?
Does ultrasound provide accurate diagnosis of lower limb deep venous thrombosis compared to contrast venography?
While ultrasound is generally appropriate for replacing venography in DVT investigation, its diagnostic accuracy varies significantly based on clinical context, operator experience, and equipment, particularly for below-knee or recurrent DVT.
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Ultrasound supports targeted first-line use in acute femoropopliteal DVT; leaves open accuracy and protocols for below-knee, recurrent, and surveillance settings.
The replacement of venography with ultrasound in investigation of lower limb deep venous thrombosis (DVT) is a trend that generally has been appropriate. However, there is substantial variation in reported accuracies related to different clinical contexts, operator experience and sophistication of equipment. The best and most consistent results are for suspected acute femoropopliteal thrombosis, while there is variation in accuracy and diagnostic approach for below knee thrombosis. Potential exists for substantial diagnostic inaccuracy for suspected recurrent DVT, in surveillance of high-risk patients and in patients with possible pulmonary embolism. The choice of ultrasound over contrast venography should take account of local expertise and accuracy, availability of resources, clinical indication for investigation and cost-effectiveness.
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RN Gibson (1995) studied this question.
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