Effect of fasting and parenteral alimentation on PIPIDA scintigraphy.

Ten patients were prospectively studied using 99mTc-PIPIDA imaging to evaluate the effects of fasting and parenteral alimentation on gallbladder function. Three of ten patients had initial nonvisualization of the gallbladder for up to 2 hr, yet had normal visualization on repeat imaging performed after resumption of oral intake or after parenteral alimentation was discontinued. 99mTc-PIPIDA imaging should be interpreted with caution in patients fitting into either of these groups.