Hey Ron,
From what I understand you can have a scan done to check for proper function.
A gallbladder scan is a scanning test that checks to see how your gallbladder is working. The scan can find blockage in the tubes (bile ducts) that lead from the liver to the gallbladder and small intestine.
During a gallbladder scan, a radioactive tracer substance is put into a vein in the arm. The liver removes the tracer from the blood and adds it to the bile that normally flows through the bile ducts to the gallbladder. The gallbladder then releases the tracer into the first part of the small intestine. A special camera takes pictures of the tracer as it moves through the liver, bile ducts, gallbladder, and small intestine.
I know of others who have had this scan with varied results. I'm not sure of other specifics.