What is PJI?

Periprosthetic joint infection (PJI) is an infection that occurs around an artificial joint, such as a hip or knee replacement. It is a rare but serious complication that can affect the success of your joint replacement.

Signs and Symptoms

If you have a joint replacement, watch for the following signs:

• Persistent pain or swelling around the joint

• Redness or warmth over the joint

• Drainage or oozing from the wound

• Fever or chills

• Difficulty using the joint as usual

Diagnosis

Doctors use a combination of methods to diagnose PJI, including:

• Blood tests to check for signs of infection

• Imaging, such as X-rays or CT scans, to assess the joint

• A sample of joint fluid (aspiration) to test for bacteria

Treatment Options

Treatment depends on the severity and timing of the infection. Options may include:

• Antibiotics to treat the infection

• Surgery to clean the joint (known as debridement)

• In some cases, the joint replacement may need to be revised or removed temporarily

• Rehabilitation: physical therapy to regain strength and range of movement