Question

Which of the following may cause a false-positive biliary scan?

a. if the patient has recently eaten
b. if the patient has been fasting for >24 hrs
c. the use of sincalide
d. A and B
e. B and C

Answer 1

Option B. Both having recently eaten and fasting for more than 24 hours could lead to false-positive results on a biliary scan. Eating can interfere with the test, while extended fasting might alter gallbladder function.

Step-by-step explanation:

The question pertains to factors that may affect the outcome of a biliary scan, leading to false-positive results. A false-positive in a biliary scan happens when the test suggests an abnormality, like a blockage of the bile ducts, even when there is none.

Two common factors that can cause false-positive results are: if the patient has recently eaten (which could interfere with the passage of the radiopharmaceutical) and if the patient has been fasting for more than 24 hours (which can alter gallbladder function).

The use of sincalide, a medication that stimulates the gallbladder, shouldn't cause a false-positive result. Therefore, the correct answer is d. A and B, signifying that both recent eating and extended fasting can lead to a false-positive result.