The moality rate of emergency operation for abdominal aoic aneurysm is:

Ans is d i.e. 50% In elective surgery of abdominal aoic aneurysm the operative moality rate approximates 1 to 2% whereas after acute rupture the moality rate of emergency operation generally approximates 45- 50%. Abdominal Aoic Aneurysms Abdominal aoic aneurysm (AAA) is the most common true aerial aneurysm. An aoic aneurysm is defined as a focal dilation of the aoa with a diameter of at least 1.5 times that of the expected normal diameter of that given aoic segment; in the AA, enlargement of the aoic diameter of more than 3 cm is usually considered aneurysmal. Most common site is infrarenal. More common in males than females. Incidence increases with age. At least 90% of all abdominal aoic aneurysms >4.0 cm are related to atherosclerotic disease. Prognosis is related to both the size of the aneurysm and the severity of coexisting coronary aery and 3 cerebrovascular disease. The risk of rupture is directly related to the size of aneurysm. An abdominal aoic aneurysm is usually asymptomatic. They are usually detected incidentally on routine clinical examinations or investigation performed for some other reasons. As abdominal aoic aneurysms expand, however, they may become painful. Aneurysmal pain is usually a harbinger of rupture and represents a medical emergency. More often, acute rupture occurs without any prior warning, and this complication is always life-threatening. Contrast-enhanced CT is investigation of choice. MRI is as sensitive and specific as CECT and is used if use of contrast is precluded. Ultrasound is the screening study of choice and is useful for serial documentation of aneurysm size Operative repair of the aneurysm with inseion of a prosthetic graft or endovascular placement of an aoic stent graft is indicated for: - abdominal aoic aneurysms of any size that are expanding rapidly or are associated with symptoms. - for asymptomatic aneurysms, abdominal aoic aneurysm repair is indicated if the diameter is >5.5 cm. The decision to perform an open surgical operation or endovascular repair is based in pa on the vascular anatomy and comorbid conditions. Endovascular repair of abdominal aoic aneurysms has a lower sho-term morbidity rate but a comparable long-term moality rate with open surgical reconstruction. (Harrison 18/e) In Elective surgery of abdominal aoic aneurysm the operative moality, rate approximates 1 to 2% whereas after acute rupture the moality rate of emergency operation generally exceeds 50%.