Related Experiment Video
Updated: Aug 12, 2026

Application of Laparoscopic Ultrasonography in Primary Choledochal Suture during Combined Two-lens Surgery
Published on: March 28, 2025
Common bile duct stones in non-dilated bile ducts? An ultrasound study
1St George Laparoscopy Research Institute, Kogarah, New South Wales, Australia.
Abstract:
In a consecutive series of 870 patients having cholecystectomy performed by the laparoscopic technique in a single surgical unit, prospective data collection has permitted analysis of the relationship between common bile duct (CBD) diameter, as measured pre-operatively by ultrasound (US) examination, and the frequency of CBD stones. Overall, 85 patients (9.8%) have been shown to have CBD stones; the interval frequency for CBD size 0-4, 4.1-6, 6.1-8, 8.1-10 and > 10 mm, was 3.9, 9.4, 28, 32 and 50%, respectively. Because most patients have small ducts (736 with CBD size < 6.1 mm) almost half (42) of those with CBD stones came from this group. In reporting CBD size as "not dilated', radiologists should remind clinicians that this does not equate with "no CBD stones'.
More Related Videos
Related Concept Videos
Gallbladder
The gallbladder's anatomy consists of three regions: the fundus, body, and neck. Extending from the neck, the cystic duct joins the common...
Ultrasound II: Endoscopic Ultrasound and FibroScan
Endoscopic Ultrasound (EUS):
Urinary Tract Calculi III: Medical Management
Imaging Studies I: Kidney, Ureter, and Bladder Studies
Imaging Studies II: Ultrasonography
Cholecystitis

