Abstract.
Purpose: To evaluate normal retrograde cholangiograms to determine a normal range of ductal calibers and identify its variation with age.
Materials and methods: The retrograde cholangiograms of 136 patients (age range: 17–84 years; mean age 49.8 years ± 17.3 [standard deviation]) with clinical follow-up and subsequent studies suggesting normal biliary trees were evaluated. Patients with previous cholecystectomy, choledocholithiasis, or pancreatitis were excluded. Common bile duct (CBD) and common hepatic duct (CHD) sizes were measured.
Results: Measurements uncorrected for radiographic magnification of CBD revealed a mean of 8.5 mm ± 2.7 mm [standard deviation] and CHD had a mean of 8.1 mm ± 2.6 mm. There was an increase in CBD caliber by 0.5 mm per decade of increasing age (p < 0.001) and an increase in CHD caliber by 0.35 mm per decade of age (p < 0.01).
Conclusion: The range of normal cholangiographic bile duct caliber is wide and a CBD caliber of 13.9 mm occurs at the top of this range (mean plus two standard deviations). There is a small but statistically significant trend of ductal dilatation with advancing age.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received: 13 December 1995/Accepted after revision: 24 April 1996
Rights and permissions
About this article
Cite this article
Low, V. The normal retrograde cholangiogram: a definition of normal caliber. Abdom Imaging 22, 509–512 (1997). https://doi.org/10.1007/s002619900250
Published:
Issue Date:
DOI: https://doi.org/10.1007/s002619900250