Biliary - Common Bile Duct (Normal Labeled)
Caption
A normal common bile duct should be <4mm plus 1mm per decade after 40 years of age. It should be measured from inner wall to inner wall. You should attempt to find the portal triad: the CBD, the portal vein, and the hepatic artery. You may need color flow to find all three. Here the CBD and portal vein are labeled (no labeled hepatic artery). To get better images, especially if you're dealing with a lot of rib shadow, it can be helpful to have your patient take a deep breath and/or roll onto their left side. Justin Bowra MBBS, FACEM, CCPU Emergency Physician, RNSH et al.