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Recommendations for screening intervals for small aortic aneurysms.

R J McCarthy1, E Shaw, M R Whyman

  • 1Department of Vascular Surgery, Gloucestershire Royal Hospital, Gloucester, UK.

The British Journal of Surgery
|July 11, 2003
PubMed
Summary
This summary is machine-generated.

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Determining optimal rescreening intervals for small abdominal aortic aneurysms (AAAs) in 65-year-old men is crucial. Based on initial diameter, 2.6-2.9 cm AAAs need 5-year scans, 3.0-3.4 cm need 3-year scans, and 3.5-3.9 cm need 1-year scans.

Area of Science:

  • Vascular Surgery
  • Diagnostic Imaging
  • Public Health Screening

Background:

  • Small abdominal aortic aneurysms (AAAs) require monitoring to prevent rupture.
  • Determining the optimal rescreening interval is essential for effective surveillance.

Purpose of the Study:

  • To establish the ideal rescreening intervals for small abdominal aortic aneurysms (AAAs) based on initial diameter in a population of 65-year-old men.

Main Methods:

  • Analysis of 12-year population screening data for 1121 small AAAs (<4.0 cm initial diameter) in 65-year-old men.
  • Categorization into three groups based on initial diameter: 2.6-2.9 cm, 3.0-3.4 cm, and 3.5-3.9 cm.
  • Calculation of expansion rates and cumulative proportions to reach >5.5 cm, require surgery, or rupture.

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Main Results:

  • Expansion rates significantly correlated with initial diameter (0.09 cm/year for 2.6-2.9 cm, 0.16 cm/year for 3.0-3.4 cm, 0.32 cm/year for 3.5-3.9 cm).
  • Within 5 years, 2.4% of 2.6-2.9 cm AAAs exceeded 5.5 cm or needed surgery; no ruptures occurred.
  • For 3.0-3.4 cm AAAs, 2.1% reached 5.5 cm and 2.9% required surgery within 3 years; no ruptures.
  • In the 3.5-3.9 cm group, 1.2% exceeded 5.5 cm within 1 year, with 10.5% exceeding 5.5 cm or requiring surgery and 1.4% rupturing by 2 years.

Conclusions:

  • Rescreening intervals for small AAAs in 65-year-old men should be tailored to initial diameter.
  • AAAs measuring 2.6-2.9 cm should be rescanned at 5 years.
  • AAAs measuring 3.0-3.4 cm require rescreening at 3 years, and those measuring 3.5-3.9 cm at 1 year.