What is a hydrascan?
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I am guessing you are having a HIDA scan. Here is some more information:
A hepatobiliary iminodiacetic acid (HIDA) scan helps evaluate the function of the gallbladder and the bile ducts. Doctors may also refer to this procedure as cholescintigraphy.
In preparation for a HIDA scan, a dye or other chemical (radioactive tracer) is injected into your vein. The tracer travels to your liver and then into the bile ducts. A special scanner placed over your abdomen tracks the movement of the tracer through your biliary tract and makes images of the liver, gallbladder and bile ducts.
A HIDA scan is used to diagnose:
Obstruction of the bile ducts, such as due to gallstones or rarely, tumors
Diseases of the gallbladder
Bile leaks
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