To outline joint contour and soft-tissue structures

To evaluate persistent unexplained joint discomfort or pain

To identify acute or chronic abnormalities of the joint capsule or supporting ligaments of the knee, shoulder, ankle, hip, or wrist

To detect internal joint derangements

To locate synovial cysts

To evaluate damage from recurrent dislocations

Make sure that the consent form is signed by the child’s parents or legal guardians.

Note and report all allergies.

Explain the purpose of the study, how it’s done, who will perform the study, and where it will take place.

Inform the child and his parents that he need not restrict food and fluids.

Warn the child that a tingling sensation, burning, or pressure in the joint may occur with the contrast injection.

Explain to the child that some swelling, discomfort, or crepitant noises may occur in the joint after the study and that these usually disappear after 1 or 2 days. Tell the child and his parents to contact the physician if symptoms persist.