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The use of ultrasonography in a medical application was first used in the late 1940s in the United States. This use was soon followed in other countries with further research and development being carried out. The first report on Doppler ultrasound as a diagnostic tool for vascular disease was published in 1967–1968.
Meanwhile, spectral Doppler ultrasonography consists of three components: B-mode, Doppler mode, and spectral waveform displayed at the lower half of the image. Therefore, "duplex ultrasonography" is a misnomer for spectral Doppler ultrasonography, and more exact name should be "triplex ultrasonography".
Coronal plane, seen from medial side of lower leg, showing thrombosis of the fibular veins, with hyperechoic content and only marginal blood flow. Ultrasonography in suspected deep vein thrombosis focuses primarily on the femoral vein and the popliteal vein , because thrombi in these veins are associated with the greatest risk of harmful ...
Extensive lower-extremity DVT can even reach into the inferior vena cava (in the abdomen). [104] Upper extremity DVT most commonly affects the subclavian, axillary, and jugular veins. [11] The process of fibrinolysis, where DVT clots can be dissolved back into the blood, acts to temper the process of thrombus growth. [105] This is the preferred ...
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A Doppler ultrasound blood flow detector, commonly called Doppler wand or Doppler probe, and a sphygmomanometer (blood pressure cuff) are usually needed. The blood pressure cuff is inflated proximal to the artery in question. Measured by the Doppler wand, the inflation continues until the pulse in the artery ceases.
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One leg at a time. With the patient supine, empty the superficial veins by 'milking' the leg in the distal to proximal direction. Now press with your thumb over the saphenofemoral junction (2.5 cm below and 2.5 cm lateral to the pubic tubercle) and ask the patient to stand while you maintain pressure. If the leg veins now refill rapidly, the ...