Duplex ultrasound imaging machines provide both images of the deep superficial veins as well as measuring flow. This is the most accurate method for assessingindividual veins and detecting thrombosis of incompetent valves.
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Peripheral Vascular Disease - Graft Surveilance Programme - Cerebovascular Assessment
Venous Evaluation - Vasculogenic Impotence
A hand-held Doppler probe provides a simple method for assessing the competence of veins in the lower limb. With the patient standing the Doppler probe is applied over the vein in question. Compression of the calf propels the blood up the leg and this can be heard with a Doppler probe. The calf is then released and if the valves are incompetent a reverse flow phase can be heard.
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Arterial Evaluation of the Upper Limb - Vasculogenic Impotence
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