Communicating Veins

	Communicating Veins Communicating veins are veins that communicate two different points of the venous system. They can communicate the great saphenous vein with the small saphenous vein, (for example the Giacomini vein) or the superficial venous system with the deep one. In this case they are called perforator vein Perforator veins are so called because they perforate the deep fascia of muscles, to connect the superficial veins to the deep veins where they drain. Perforator veins play an essential role in maintaining normal blood draining. They have valves ...s and have a very important role in the venous system hemodynamics. References Veins {{circulatory-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Vein Veins are blood vessels in humans and most other animals that carry blood towards the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. In contrast to veins, arteries carry blood away from the heart. Veins are less muscular than arteries and are often closer to the skin. There are valves (called ''pocket valves'') in most veins to prevent backflow. Structure Veins are present throughout the body as tubes that carry blood back to the heart. Veins are classified in a number of ways, including superficial vs. deep, pulmonary vs. systemic, and large vs. small. * Superficial veins are those closer to the surface of the body, and have no corresponding arteries. Deep veins are deeper in the body and have corresponding arteries. Perforator veins drain from the superficial to the deep veins. These are usually referred to in the lower limbs and feet. Communic ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
picture info	Great Saphenous Vein The great saphenous vein (GSV, alternately "long saphenous vein"; ) is a large, subcutaneous, superficial vein of the leg. It is the longest vein in the body, running along the length of the lower limb, returning blood from the foot, leg and thigh to the deep femoral vein at the femoral triangle. Structure The great saphenous vein originates from where the dorsal vein of the big toe (the hallux) merges with the dorsal venous arch of the foot. After passing in front of the medial malleolus (where it often can be visualized and palpated), it runs up the medial side of the leg. At the knee, it runs over the posterior border of the medial epicondyle of the femur bone. In the proximal anterior thigh inferolateral to the pubic tubercle, the great saphenous vein dives down deep through the cribriform fascia of the saphenous opening to join the femoral vein. It forms an arch, the saphenous arch, to join the common femoral vein in the region of the femoral triangle at the sapheno-femoral ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Small Saphenous Vein The small saphenous vein (also short saphenous vein or lesser saphenous vein) is a relatively large superficial vein of the posterior leg. Structure The origin of the small saphenous vein, (SSV) is where the dorsal vein from the fifth digit (smallest toe) merges with the dorsal venous arch of the foot, which attaches to the great saphenous vein (GSV). It is a superficial vein, being Subcutaneous tissue, subcutaneous (just under the skin). From its origin, it courses around the lateral aspect of the foot (inferior and posterior to the lateral malleolus) and runs along the posterior aspect of the leg (with the sural nerve), where it passes between the heads of the gastrocnemius muscle. This vein presents a number of different draining points. Usually, it drains into the popliteal vein, at or above the level of the knee joint. Variation Sometimes, the SSV joins the common gastrocnemius vein before draining in the popliteal vein. Sometimes, it does not make contact with the popliteal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Giacomini Vein The Giacomini vein, or cranial extension of the small saphenous vein is a communicating vein between the great saphenous vein (GSV) and the small saphenous vein (SSV). It is named after the Italian anatomist Carlo Giacomini (1840–1898). The Giacomini vein courses the posterior thigh as either a trunk projection, or tributary of the SSV. In one study it was found in over two-thirds of limbs. Another study in India found the vein to be present in 92% of those examined. It is located under the superficial fascia and its insufficiency seemed of little importance in the majority of patients with varicose disease, but the use of ultrasonography has highlighted a new significance of this vein. It can be part of a draining variant of the SSV which continues on to reach the GSV at the proximal third of the thigh instead of draining into the popliteal vein. The direction of its flow is usually anterograde (the physiological direction) but it can be retrograde when this vein acts as a by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Perforator Vein Perforator veins are so called because they perforate the deep fascia of muscles, to connect the superficial veins to the deep veins where they drain. Perforator veins play an essential role in maintaining normal blood draining. They have valves which prevent blood flowing back ( regurgitation) from deep to superficial veins in muscular systole or contraction. They exist along the length of the lower limb, in greater number in the leg (anatomical ref to below knee) than in the thigh. Some veins are named after the physician who first described them: Dodd's perforator at the inferior 1/3 of the thigh Boyd's perforator at the knee level Cockett's perforators at the inferior 2/3 of the leg (usually there are three: superior medium and inferior Cockett perforators) Others have the name of the deep vein where they drain: Medial gastrocnemius perforator, draining into the gastrocnemius vein Fibular perforators, usually two, one superior near the lateral aspect of the knee and o ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]