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  • graft patency
  • Administration of clopidogrel for improving early saphenous vein graft patency has provided conflicting results in small randomized studies. (clinicaltrials.gov)
  • It was hypothesized that graft patency rates were lower with external support, because of aggressive over constriction of the vein graft, unsuitable material of the devices and the use of fibrin glue that has shown to cause tissue damage, fibrosis and intimal hyperplasia. (wikipedia.org)
  • This technique shown to improve vein graft patency and less development of intimal hyperplasia. (wikipedia.org)
  • vascular
  • True aneurysms, which usually develop in the body of the vein graft and are typically fusiform, are usually the result of a chronic, degenerative process caused by vascular injury that results from hyperlipidemia and progression of atherosclerosis. (medscape.com)
  • Since the leg veins usually contain a number of valves that direct flow towards the heart, they cannot directly be used as graft, but if vein valves are removed the arterial blood can flow via the GSV to the lower leg - this is called an in situ graft procedure, a type of vascular bypass. (wikipedia.org)
  • junction
  • however, if the blood clot is located near the sapheno-femoral junction or near a perforator vein, a clot fragment can migrate to the deep venous system and to the pulmonary circulation. (wikipedia.org)
  • surgery
  • In addition to improving the vein graft failure rates in bypass surgeries, other research studies showed that external support might allow the use of conduits that previously have been considered to be unsuitable for surgery. (wikipedia.org)
  • proximal
  • The valvulotome is inserted at the distal end of the vein, guided to the proximal end, then withdrawn. (wikipedia.org)