You are or may be pregnant
You have any allergies
You have any bleeding problems or take blood thinners or other medications, including aspirin
An arthrogram is an imaging study used to assess your joint problem. Contrast fluid is injected into the joint being studied. Then, x-ray or computed tomography (CT) is used to create images.

Arrange for someone to drive you home.
Wear loose-fitting clothing.
X-rays of your joint are taken first.
The skin around the joint is cleaned and then covered with drapes.
The area around your joint is numbed.
Contrast fluid is injected into your joint to improve the images.
X-rays are again taken.
The doctor will move your joint. You will also be asked to exercise your joint.
Additional x-rays are taken after you exercise.
If you need a CT test, it will follow the x-rays.
Drink extra water or other clear fluids for 24 hours.
Make a follow-up appointment to get your results.