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Comparative Study of Common Bile Duct Diameter between Normal and Post Cholecystectomy Cases Using Trans-abdominal
R C Paudel1, S Karki1, S Suwal1
1Department of Radiodiagnosis, Dhulikhel Hospital, Kathmandu University Hospital, Dhulikhel, Kavre.
Kathmandu University Medical Journal (KUMJ)
|October 23, 2022
Summary
Post cholecystectomy significantly increases common bile duct diameter. This finding suggests careful consideration before further investigations for patients who have had their gallbladder removed.
Area of Science:
- Gastroenterology
- Abdominal Surgery
- Radiology
Background:
- Common bile duct (CBD) diameter can increase due to various factors.
- Post-cholecystectomy status is a potential, yet debated, cause of CBD dilation.
- Previous studies on this topic have yielded inconclusive results.
Purpose of the Study:
- To determine if post-cholecystectomy status leads to a statistically significant change in common bile duct diameter.
- To investigate the relationship between gallbladder removal and common bile duct dimensions.
Main Methods:
- A comparative study involving 100 participants.
- Participants were divided into two groups: 46 post-cholecystectomy cases and 54 cases with an intact gallbladder.
- Common bile duct diameters were measured, and an unpaired t-test was employed for statistical analysis.
Main Results:
- A statistically significant difference in common bile duct diameter was observed between the two groups (p < 0.001).
- The analysis confirmed a significant increase in CBD diameter in patients post-cholecystectomy.
- Both one-tailed and two-tailed tests indicated the significance of the findings.
Conclusions:
- Post-cholecystectomy status is associated with an increased common bile duct diameter.
- This dilation is likely a direct consequence of gallbladder removal, not necessarily an obstructive cause.
- Clinical decisions regarding further investigations and treatments in post-cholecystectomy patients should account for this finding.

