1 (If you don't know what these, are set them each to 0.5. 2  z is the value that specifies the level of confidence you want in your confidence interval when you analyze your data. 3  Typical levels of confidence for surveys are 95%, in which case z is set to 1.96. 4  E sets the accuracy of your sample proportions.
A hepatobiliary (HIDA) scan is an imaging procedure used to diagnose problems of the liver, gallbladder and bile ducts. For a HIDA scan, also known as cholescintigraphy and hepatobiliary scintigraphy, a radioactive tracer is injected into a vein in your arm.
Gallbladder problems are diagnosed through various tests. These may include: 1  Liver function tests (LFTs), which are blood tests that can show evidence of gallbladder disease. 2  A check of the blood's amylase or lipase levels to look for inflammation of the pancreas. 3  Amylase and lipase are enzymes (digestive chemicals) produced in the pancreas.