Which agents are used to measure gallbladder ejection fraction?

The measurement of gallbladder ejection fraction is specifically accomplished using certain radiopharmaceuticals and agents that stimulate gallbladder contraction. Sincalide, a synthetic form of cholecystokinin (CCK), is utilized for this purpose because it enhances gallbladder motility, thus allowing for an accurate assessment of how well the gallbladder can empty its contents.

When Sincalide is administered, it stimulates the gallbladder to contract, and the function is monitored using 99mTc-disofenin, which is a radiolabeled agent that targets the liver and biliary system. This combination allows for a clear visualization of gallbladder function through imaging, facilitating the calculation of ejection fraction.

The other options involve agents that do not combine the appropriate pharmacological action with the suitable radiotracers necessary for accurate gallbladder function assessment. So, the combination of Sincalide and 99mTc-disofenin is the correct and effective choice for measuring gallbladder ejection fraction, ensuring both stimulation and visualization of gallbladder activity.