What is an Arthrogram?

An arthrogram is a diagnostic study of a joint space (e.g., shoulder, knee, wrist, etc.) using iodinated contrast material and occasionally air. Arthrograms are typically performed to demonstrate a tear in the joint.

Procedure

X-rays are taken to establish the joint space of interest prior to beginning the procedure. The radiologist will then mark and position the joint using fluoroscopy. The skin is cleaned using betadine and then draped with a sterile field. The joint is then anesthetized, usually with xylocaine. After the initial needle stick and numbing of the skin, you should feel little pain. A needle is positioned inside the joint and contrast material is injected into the space. Sometimes air may be put in to distend the joint and increase the pressure inside the joint. Once the contrast material is in the joint the needle is removed and radiographs are taken. The exam, depending on which joint is being studied, can take anywhere from 45 minutes to 3 or 4 hours.

Precautions

The usual risks of infection and /or contrast reaction exist, requiring the need for an informed consent form to be reviewed and signed by the patient.

Post Exam

Exertion of the joint should be avoided for at least 24 hours.

You may experience some joint irritation after the local anesthetic wears off. The body, in a short time, absorbs the contrast and/or air.

The radiologist will interpret the study done and will dictate a report for your doctor. Your doctor will discuss the results with you.