For hysterosalpingography, the exam commonly uses a contrast agent that is:

• A. Left in the patient at the end
• B. Oily iodinated
• C. Noniodinated
• D. Removed from the patient at the end

Answer: (A)

In hysterosalpingography, the purpose is to outline the uterine cavity and the fallopian tubes by filling them with a radiopaque contrast so we can see patency on the images. The contrast used is typically a water-soluble iodinated agent chosen for clear visualization and quick dispersion. The exam is conducted with the understanding that some of this contrast will remain inside the uterus and tubes at the end of the procedure, rather than being immediately flushed out. This helps maintain adequate distention and opacification for the taken radiographs, and any residual contrast can be expelled naturally afterward without added risk.