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Related Experiment Videos

Rupture in small abdominal aortic aneurysms

S C Nicholls1, J B Gardner, M H Meissner

  • 1Division of Vascular Surgery, Department of Surgery, Harborview Medical Center, University of Washington School of Medicine, Seattle, USA.

Journal of Vascular Surgery
|November 11, 1998
PubMed
Summary
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Repairing small abdominal aortic aneurysms (AAAs) under 5 cm is debated. This study found similar mortality for small and large ruptured AAAs, but higher risks for those with lung disease or diabetes.

Area of Science:

  • Vascular Surgery
  • Aneurysm Research
  • Public Health

Background:

  • The management of small abdominal aortic aneurysms (AAAs), defined as less than 5 cm in diameter, lacks consensus.
  • Ruptured AAAs (rAAAs) present a significant surgical challenge, with decisions regarding repair of smaller aneurysms remaining controversial.

Purpose of the Study:

  • To compare outcomes of ruptured abdominal aortic aneurysms (rAAAs) based on size (less than 5 cm vs. greater than 5 cm).
  • To identify risk factors associated with the rupture of small AAAs.

Main Methods:

  • A retrospective review of 161 consecutive patients with ruptured AAAs (rAAAs) was conducted.
  • Aneurysm size was measured preoperatively via ultrasound or CT scan.
  • Patients with rAAAs < 5 cm (n=11) were compared to those with rAAAs > 5 cm (n=150).

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Main Results:

  • Mortality rates for small rAAAs (70%) and large rAAAs (66%) were similar.
  • Hypertension and cardiac disease prevalence did not differ significantly between groups.
  • Obstructive lung disease (64% vs. 25%, P=.02) and diabetes (28% vs. 3%, P=.004) were significantly more prevalent in the small rAAA group.

Conclusions:

  • Elective repair of small AAAs (4-5 cm) should be considered for eligible patients due to the high risk of rupture.
  • Obstructive lung disease and diabetes are associated with an increased risk of small AAA rupture and warrant special consideration.
  • Further research is needed to understand the link between these comorbidities and small AAA rupture risk.