Can hida scans show false positives?

Absence of the : Isotope in the gallbladder can be seen in settings other than acute cholecystitis. Chronic cholecystitis, patients on intravenous hyperalimentation, and inadequate fasting before the procedure are a few causes.

Yes!: Prolonged fasting, certain drugs and other things can cause a false positive hida scan.

Yes, but not common: Yes, just about any study can have false positives, however it is not common with a hida scan. Things which can interfere with the study and cause a false positive include, prolonged fasting(more than 24hrs), very poor liver function, non-fasting state (less than 4hrs), prior surgery to remove the gallbladder, pancreatitis, TPN (total parenteral nutrition).

Yes: Fasting too long prior to study instead of recommend 6 hours, intravenous nutrition rather than oral ingestion of food, pain medications such as morphine and demerol, (meperidine hydrochloride) can produce false results.Rare instance such as congenital absence of gall bladder is another possibility.