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Screening for abdominal aortic aneurysms.

M Law1

  • 1Department of Environmental and Preventive Medicine, Wolfson Institute of Preventive Medicine, St Bartholomew's, London, UK.

British Medical Bulletin
|June 15, 1999
PubMed
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Screening men over 60 for abdominal aortic aneurysms using ultrasound can prevent thousands of deaths annually. A 6.0 cm diameter threshold identifies 86% of ruptures with a low false positive rate.

Area of Science:

  • Vascular Surgery
  • Preventive Medicine
  • Diagnostic Imaging

Background:

  • Ruptured abdominal aortic aneurysm (AAA) is a significant cause of mortality in men over 60.
  • Aortic diameter measured by ultrasound is a key predictor of AAA rupture risk.

Purpose of the Study:

  • To evaluate the effectiveness of population-based screening for AAA in men over 60.
  • To determine an optimal aortic diameter threshold for screening and intervention.

Main Methods:

  • Ultrasound measurement of aortic diameter in men aged over 60.
  • Risk stratification based on aortic diameter to predict annual rupture probability.
  • Calculation of detection and false positive rates for a 6.0 cm threshold.

Main Results:

Related Experiment Videos

  • An aortic diameter of 6.0 cm or greater is associated with a 17% annual rupture risk.
  • A 6.0 cm threshold yields an 86% detection rate and a 0.6% false positive rate.
  • Surgical risk (5%) is significantly lower than rupture risk (>17%) for aneurysms >= 6.0 cm.

Conclusions:

  • A national screening program for men over 60 is recommended to prevent approximately 2000 deaths per year.
  • Screening identifies individuals at high risk for AAA rupture, enabling timely surgical intervention.
  • Further research is needed to determine optimal surveillance intervals for smaller aneurysms (5.0-5.9 cm).