The vein formed by the union of the anterior and posterior tibial veins; it courses through the popliteal space and becomes the femoral vein.

The vessels carrying blood away from the capillary beds.

The vein accompanying the femoral artery in the same sheath; it is a continuation of the popliteal vein and becomes the external iliac vein.

Impaired venous blood flow or venous return (venous stasis), usually caused by inadequate venous valves. Venous insufficiency often occurs in the legs, and is associated with EDEMA and sometimes with VENOUS STASIS ULCERS at the ankle.

Ultrasonography applying the Doppler effect combined with real-time imaging. The real-time image is created by rapid movement of the ultrasound beam. A powerful advantage of this technique is the ability to estimate the velocity of flow from the Doppler shift frequency.

The vein which drains the foot and leg.

Radiographic visualization or recording of a vein after the injection of contrast medium.

Skin diseases affecting or involving the cutaneous blood vessels and generally manifested as inflammation, swelling, erythema, or necrosis in the affected area.

Enlarged and tortuous VEINS.

The blood pressure in the VEINS. It is usually measured to assess the filling PRESSURE to the HEART VENTRICLE.

Transducers that are activated by pressure changes, e.g., blood pressure.

The inferior part of the lower extremity between the KNEE and the ANKLE.

Flaps within the VEINS that allow the blood to flow only in one direction. They are usually in the medium size veins that carry blood to the heart against gravity.

The formation or presence of a blood clot (THROMBUS) within a vein.

Instruments that generate intermittent forces, uniformed or graduated, to facilitate the emptying of VEINS. These devices are used to reduce limb EDEMA and prevent venous THROMBOEMBOLISM, such as deep vein thrombosis in the legs.

Inflammation of a vein associated with a blood clot (THROMBUS).

A SYNOVIAL CYST located in the back of the knee, in the popliteal space arising from the semimembranous bursa or the knee joint.

A condition characterized by a chronically swollen limb, often a leg with stasis dermatitis and ulcerations. This syndrome can appear soon after phlebitis or years later. Postphlebitic syndrome is the result of damaged or incompetent venous valves in the limbs. Distended, tortuous VARICOSE VEINS are usually present. Leg pain may occur after long period of standing.

Insertion of a catheter into a peripheral artery, vein, or airway for diagnostic or therapeutic purposes.

A short thick vein formed by union of the superior mesenteric vein and the splenic vein.

Pathological outpouching or sac-like dilatation in the wall of any blood vessel (ARTERIES or VEINS) or the heart (HEART ANEURYSM). It indicates a thin and weakened area in the wall which may later rupture. Aneurysms are classified by location, etiology, or other characteristics.

The condition of an anatomical structure's being constricted beyond normal dimensions.

Ultrasonography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image. This type of ultrasonography is well-suited to identifying the location of high-velocity flow (such as in a stenosis) or of mapping the extent of flow in a certain region.

The veins that return the oxygenated blood from the lungs to the left atrium of the heart.

Recording of change in the size of a part as modified by the circulation in it.

Operative procedures for the treatment of vascular disorders.

Veins in the neck which drain the brain, face, and neck into the brachiocephalic or subclavian veins.

Blocking of the PULMONARY ARTERY or one of its branches by an EMBOLUS.

The posture of an individual lying face up.

Any inflammation of the skin.

Veins which return blood from the intestines; the inferior mesenteric vein empties into the splenic vein, the superior mesenteric vein joins the splenic vein to form the portal vein.

Short thick veins which return blood from the kidneys to the vena cava.

Venous vessels in the umbilical cord. They carry oxygenated, nutrient-rich blood from the mother to the FETUS via the PLACENTA. In humans, there is normally one umbilical vein.

A vein on either side of the body which is formed by the union of the external and internal iliac veins and passes upward to join with its fellow of the opposite side to form the inferior vena cava.

A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.

The flow of BLOOD through or around an organ or region of the body.

Veins which drain the liver.

The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.

The continuation of the axillary vein which follows the subclavian artery and then joins the internal jugular vein to form the brachiocephalic vein.