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Aortic Dissection and Aneurysms

Discussion in 'General Surgery' started by XYDAU, Mar 31, 2011.

  1. XYDAU

    XYDAU Well-Known Member

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    [​IMG]Abdominal aortic aneurysm is a localized dilatation of the abdominal aorta exceeding the normal diameter by more than 50 percent, and is the most common form of aortic aneurysm. Approximately 90 percent of abdominal aortic aneurysms occur infrarenally,but they can also occur pararenally or suprarenally.Abdominal aortic aneurysms occur most commonly in individuals between 65 and 75 years old and are more common among men and smokers.

    Abdominal aortic aneurysms are commonly divided according to their size and symptomatology. An aneurysm is usually defined as an outer aortic diameter over 3 cm (normal diameter of the aorta is around 2 cm).If the outer diameter exceeds 5.5 cm, the aneurysm is considered to be large.

    The vast majority of aneurysms are asymptomatic. However, as abdominal aortic aneurysms expand, they may become painful and lead to pulsating sensations in the abdomen or pain in the chest, lower back, or scrotum.The risk of rupture is high in a symptomatic aneurysm, which is therefore considered an indication for surgery.The complications include rupture, peripheral embolization, acute aortic occlusion, and aortocaval (between the aorta and inferior vena cava) or aortoduodenal (between the aorta and the duodenum) fistulae. On physical examination, a palpable abdominal mass can be noted. Bruits can be present in case of renal or visceral arterial stenosis....
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    Abdominal aortic aneurysms
     

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