[Doppler examination. Specificity and sensibility in comparison with standard phlebography in recent deep venous thrombosis of the lower limbs (author's transl)].

The diagnosis of deep venous thrombosis of the lower limbs often poses difficult problems. Whilst it is usually obvious in cases of massive thrombosis of the ilio-femoral veins, it is often much more difficult in the presence of isolated minimal obstruction of a leg vein. Clinical findings are often inadequate, various laboratory investigations fail to provide definite arguments and only phlebography can confirm venous occlusion. Ultrasound examination by Doppler effect can offer great service in all cases by confirming the clinical impression and aiding in determining the indication for radiological investigation. The reliability of the examination is excellent above the knee and much more hazardous below. At any event, it is based upon a strict protocol and depends essentially upon the experience of the individual performing it.