Therapeutic Joint Injections

Read this so you understand the procedure and its risks. Please ask questions about anything you do not understand.

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What are joint injections?

Joint injections are a form of treatment for children with arthritis. We inject a high-dose steroid directly into the joint, most commonly the temporomandibular joint (TMJ), in the jaw, or the subtalar joint, in the foot.

This procedure occurs in Interventional Radiology because these joints are difficult to locate, and the doctor must use ultrasound, live X-ray (fluoroscopy) or CT scan for guidance.

How is a joint injection performed?

Using ultrasound, live X-ray or CT scan for guidance, the doctor will place a small needle into the affected joint. In some cases, the doctor then injects a small amount of X-ray dye (contrast) to confirm that the needle is within the joint. Once placement is confirmed, the doctor injects the liquid steroid medication. Then we will remove the needle and apply a bandage.

How long does the procedure take?

Less than one hour.

Will my child be awake for the procedure?

No. We will use either IV sedation or general anesthesia so that your child is not awake.

What are the risks of joint injections?

This is considered a low-risk procedure. Potential complications include:

Will my child feel any pain after the injection?

Most patients do not experience pain or discomfort after the procedure. Some feel fullness in the joint for a few days until the liquid medication is absorbed. The procedure site may be tender to the touch. You may give your child over-the-counter pain medication.

The injection site may be swollen within the first 24 hours. The swelling should go down within three to five days.

When can I remove the bandage?

The bandage must stay dry and in place for 24 hours. After 24 hours you may remove the clear bandage and gauze, or the Band-Aid®.

When can my child bathe?

Your child can shower or take a bath after the bandage is removed.

Are there any activity restrictions?

We suggest your child limits activity for 24 hours. Your child can go to day care or school but shouldn’t participate in sports or strenuous activity. This is especially true if the injection was in the foot.

If the TMJ was injected your child should avoid hard, chewy foods for several days.


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Contact us immediately if your child experiences any of the following:

  • fever higher than 101° Fahrenheit
  • redness at the injection site
  • pain that isn’t helped by over-the-counter medication
  • site still swollen after three to five days

Call Interventional Radiology
between 8 a.m. and 4:30 p.m., Monday through Friday, at
215-590-7000. At the first prompt push 1 and at the second prompt push 2.

At all other times, call 215-590-1000 and ask to speak to the interventional radiologist on call.