CBD Dilation by Age
I believe you are asking about common bile duct (CBD) dilation and how normal measurements vary by age, not cannabidiol effects. The provided evidence exclusively addresses cannabidoid/cannabis use and diabetes management in older adults, which does not address biliary anatomy or common bile duct measurements.
Critical Clarification Needed
The evidence provided does not contain any information about:
- Common bile duct diameter measurements
- Age-related changes in biliary anatomy
- Normal CBD diameter ranges by age group
- Pathological CBD dilation thresholds
General Medical Knowledge on CBD Diameter by Age
The upper limit of normal for common bile duct diameter increases with age, typically calculated as approximately 1mm per decade after age 60, with a baseline upper limit of 6-7mm in younger adults.
Age-Based Normal CBD Diameter Guidelines:
- Adults <60 years: Upper limit of normal ≤6-7mm
- Adults ≥60 years: Upper limit increases approximately 1mm per decade
- Age 60-70: ≤7-8mm
- Age 70-80: ≤8-9mm
- Age >80: ≤9-10mm
Clinical Considerations:
- Post-cholecystectomy patients may have CBD dilation up to 10mm without pathology
- Symptomatic patients with CBD >6mm warrant investigation regardless of age
- Progressive dilation on serial imaging is concerning even if within age-adjusted limits
Important Caveat
Without access to radiology guidelines, hepatobiliary imaging standards, or gastroenterology references in the provided evidence, I cannot provide citation-supported recommendations. If you intended to ask about cannabidiol (CBD) effects on vascular or other dilation by age, please clarify, though the provided evidence focuses primarily on safety profiles rather than physiological effects on dilation.