Abdomen Normal MeasurementsThis is a featured page

This page contains normal sonographic measurements for the abdomen


  • 4-6mm
  • Thickness 2-4mm
  • Width 2-3mm
  • The maximum AP outer wall diameter is the preferred measurement for assessment of aortic size
  • Avoid transverse measurements if there is side to side tortuosity
  • Total length of aneurysm measurements are of no use clinically and should not be quoted as this can lead to confusion with the AP diameter
  • Aneurysm > 3.0cm
  • Abnormal: Outer diameter ≥ 6mm, non compressible
Gall Bladder
  • Width abnormal if > 4 cm
  • Wall Thickness: abnormal > 3 mm
Bile Duct
  • Normal ≤ 6mm
  • Useful rule of thumb: bile duct caliber increases 1mm with each decade, i.e. 6mm at 60yrs, 7mm at 70 yrs etc.
  • Post cholecystectomy: 6-10mm indeterminate
Kidney Length
  • Normal Range: lower 9-10cm, upper 12-13 cm, variable depending on body size
  • Left usually longer than right, difference <1.5cm
  • Mid hepatic line> 15.5cm enlarged in 75%
  • Portal Vein < 1.3 cm, > 20% change in caliber with respiration
  • Splenic Vein /SMV > 20% change in caliber with respiration
Pancreas AP Diameter
  • Head 1.9 - 2.5 cm
  • Body1.5 – 2.1 cm
  • Tail 1.0- 2.0
  • Normal Length < 13 cm
  • Rule of thumb for children: spleen length = 6 cm + 1/3 cm per year of age
  • Upper limit of normal: 30 cc

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Latest page update: made by KasimHasso , Feb 26 2013, 10:58 AM EST (about this update About This Update KasimHasso Edited by KasimHasso

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