Abdomen Normal Measurements

This page contains normal sonographic measurements for the abdomen

Abdomen Adrenal 4-6mm Thickness 2-4mm Width 2-3mm Aorta 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 Appendix 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 Liver 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 Spleen Normal Length < 13 cm Rule of thumb for children: spleen length = 6 cm + 1/3 cm per year of age Prostate Upper limit of normal: 30 cc

Abdomen

Adrenal

4-6mm
Thickness 2-4mm
Width 2-3mm

Aorta

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

Appendix

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

Liver

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

Spleen

Normal Length < 13 cm
Rule of thumb for children: spleen length = 6 cm + 1/3 cm per year of age

Prostate

Upper limit of normal: 30 cc

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AndyC	Latest page update: made by AndyC , Mar 11 2009, 9:39 AM EDT (about this update About This Update Edited by AndyC 1 word added 1 word deleted view changes - complete history)
	Keyword tags: abdomen Aorta appendix Bile Duct Gall Bladder Kidney Length liver measurements Pancreas prostate Spleen ultrasound More Info: links to this page

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