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  2. Ultrasonography of chronic venous insufficiency of the legs

    en.wikipedia.org/wiki/Ultrasonography_of_chronic...

    It can result in varicose veins and, in severe cases, in venous ulcer. The reversed blood pools in the low third of legs and feet. [17] Unlike in the arterial ultrasound study, when the sonographer studies venous insufficiency, the vein wall itself has no relevance and attention is focused on the direction of blood flow. The objective of the ...

  3. Umbilical vein - Wikipedia

    en.wikipedia.org/wiki/Umbilical_vein

    The unpaired umbilical vein carries oxygen and nutrient rich blood derived from fetal-maternal blood exchange at the chorionic villi.More than two-thirds of fetal hepatic circulation is via the main portal vein, while the remainder is shunted from the left portal vein via the ductus venosus to the inferior vena cava, eventually being delivered to the fetal right atrium.

  4. Lower limbs venous ultrasonography - Wikipedia

    en.wikipedia.org/wiki/Lower_limbs_venous_ultras...

    A lower limbs venous ultrasonography may refer to: Ultrasonography of chronic insufficiency of the legs; Ultrasonography of deep venous thrombosis

  5. Chronic venous insufficiency - Wikipedia

    en.wikipedia.org/wiki/Chronic_venous_insufficiency

    Chronic venous insufficiency (CVI) is a medical condition characterized by blood pooling in the veins, leading to increased pressure and strain on the vein walls. [1] The most common cause of CVI is superficial venous reflux, which often results in the formation of varicose veins, a treatable condition. [2]

  6. Caput medusae - Wikipedia

    en.wikipedia.org/wiki/Caput_medusae

    Produces abdominal collateral veins to bypass the blocked inferior vena cava and permit venous return from the legs. Determine the direction of flow in the veins below the umbilicus. After pushing down on the prominent vein, blood will: flow toward the legs → caput medusae; flow toward the head → inferior vena cava obstruction.

  7. Pelvic congestion syndrome - Wikipedia

    en.wikipedia.org/wiki/Pelvic_congestion_syndrome

    Pelvic congestion syndrome, also known as pelvic vein incompetence, is a long-term condition believed to be due to enlarged veins in the lower abdomen. [1] [7] The condition may cause chronic pain, such as a constant dull ache, which can be worsened by standing or sex. [1] Pain in the legs or lower back may also occur. [1]

  8. Ultrasonography of deep vein thrombosis - Wikipedia

    en.wikipedia.org/wiki/Ultrasonography_of_deep...

    The risk of deep vein thrombosis can be estimated by Wells score. Lower limbs venous ultrasonography is also indicated in cases of suspected pulmonary embolism where a CT pulmonary angiogram is negative but a high clinical suspicion of pulmonary embolism remains. [1] It may identify a deep vein thrombosis in up to 50% of people with pulmonary ...

  9. Venous stasis - Wikipedia

    en.wikipedia.org/wiki/Venous_stasis

    Weakened Venous valves: these are crucial towards ensuring upward flow to the heart from the lower extremities. If weakened, they may fail to close properly which leads to backwards blood flow/blood pooling. This can lead to slower blood flow in the veins. [8] Ultrasonography-Doppler ultrasound