Which condition is most likely to cause obstructive jaundice when differentiating from hepatic jaundice by CBD measurement?

Which condition is most likely to cause obstructive jaundice when differentiating from hepatic jaundice by CBD measurement?

• A. Hyperglycemia
• B. Biliary tract obstruction
• C. Dehydration
• D. Anemia

Answer: (B)

When trying to separate obstructive jaundice from hepatic jaundice using ultrasound, the size of the common bile duct (CBD) is key. Obstruction in the biliary tree blocks bile flow, so bile backs up and the CBD becomes dilated. That dilation points to obstructive jaundice. Biliary tract obstruction is the scenario that directly causes this dilation, which is why it’s the best answer. The other options—hyperglycemia, dehydration, and anemia—don’t create a blockage in the biliary system. They can affect overall health or liver enzymes in various ways but do not typically produce CBD dilation or obstructive jaundice.

When trying to separate obstructive jaundice from hepatic jaundice using ultrasound, the size of the common bile duct (CBD) is key. Obstruction in the biliary tree blocks bile flow, so bile backs up and the CBD becomes dilated. That dilation points to obstructive jaundice.

Biliary tract obstruction is the scenario that directly causes this dilation, which is why it’s the best answer. The other options—hyperglycemia, dehydration, and anemia—don’t create a blockage in the biliary system. They can affect overall health or liver enzymes in various ways but do not typically produce CBD dilation or obstructive jaundice.