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[48] [6] Since 1970, real-time scanners and pulsed Doppler have enabled the use of ultrasound to study the function of the venous system. The first demonstration of color Doppler was achieved by Geoff Stevenson. [49] [50]
Less frequently it is used to demonstrate the incompetent valves of perforating veins. Doppler ultrasound is preferable rather than venography to access the competence of the veins. Local sepsis of the lower limbs is contraindicated for this procedure. Low osmolar contrast agent with concentration of 240 mg/ml is preferable in this study ...
The most common cause of chronic venous insufficiency is reflux of the venous valves of superficial veins. [2] This may in turn be caused by several conditions: Deep vein thrombosis (DVT), that is, blood clots in the deep veins. Chronic venous insufficiency caused by DVT may be described as postthrombotic syndrome. DVT triggers an inflammatory ...
[1] [22] Five ultrasound criteria of venous drainage have been proposed to be characteristic of the syndrome, although two are considered sufficient for diagnosis of CCSVI: [1] [22] [35] reflux in the internal jugular and vertebral veins, reflux in the deep cerebral veins, high-resolution B-mode ultrasound evidence of stenosis of the internal ...
Medical ultrasound includes diagnostic techniques (mainly imaging techniques) using ultrasound, as well as therapeutic applications of ultrasound. In diagnosis, it is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs, to measure some characteristics (e.g., distances and velocities) or to generate an informative audible sound.
Less commonly, but not exceptionally, varicose veins can be due to other causes, such as post-phlebitic obstruction or incontinence, venous and arteriovenous malformations. [18] Venous reflux is a significant cause. Research has also shown the importance of pelvic vein reflux (PVR) in the development of varicose veins.
Before any treatment of leg telangiectasia is considered, it is essential to have duplex ultrasonography, the test that has replaced Doppler ultrasound. The reason for this is that there is a clear association between leg telangiectasia and underlying venous reflux. [12]
A study of 516 treated veins over 69 months by Elmore and Lackey reported a success rate of 98.1%. [ 6 ] Endovenous thermal ablation (EVTA) by radiofrequency or laser is a safe and effective treatment of refluxing great saphenous veins [ 7 ] (GSVs) and has replaced traditional high ligation and stripping in official recommendations of various ...
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