Introduction–

A prosthetic joint infection or rather PJI happens when the tissues surrounding an artificial joint gets infected. It can develop after a surgery is done or it can also happen later. A PJI cannot be recognised immediately due to the symptoms being so subtle as it can grow slowly and complicate matters. So it could be dismissed as joint pain rather than an infection. 

The bacteria may reach the area during the original operation, spread from nearby tissue or, less commonly, travel through the bloodstream from another infection.

Not every painful joint replacement is infected. Loosening, wear, instability and other mechanical problems can produce similar symptoms. This is why PJI diagnosis usually involves combining the patient’s symptoms and history with blood tests, joint-fluid analysis and other investigations rather than relying on one test alone.

Prosthetic Joint Infection Causes-

The causes of PJI are not always as straightforward as a wound that becomes visibly red and swollen. Bacteria can enter the joint during or around the time of surgery, or reach an existing implant later.

There are also infections that develop months or years after a replacement. This is one reason a new change in a previously well-functioning artificial joint should not automatically be dismissed as normal ageing of the implant.

Joint Replacement Infection Symptoms-

Common prosthetic joint infection symptoms may include:

• Increasing or persistent pain around the artificial joint
• Swelling or warmth
• Redness around the joint or surgical area
• Wound drainage or pus
• Fever or chills
• Increasing stiffness or difficulty moving the joint
• A joint that becomes painful after previously functioning well

Some infections are much less obvious. A chronic infection may present mainly as persistent pain or reduced function, without high fever or obvious drainage. A draining sinus over a prosthesis is particularly concerning for PJI.

PJI Hip: How Does Infection Present?

A PJI hip, or hip PJI, can be more difficult for a patient to recognise because the symptoms may feel like deep groin, thigh or buttock pain rather than pain directly around the surgical scar.

Symptoms of infection in hip replacement joint can include persistent or increasing pain, stiffness, swelling, fever, wound drainage or difficulty putting weight through the leg. However, an infection can also develop gradually, with pain being the main complaint.

Infection After Hip Replacement-

An infection after hip replacement may occur early after surgery or present later. A previously comfortable hip that becomes increasingly painful should not automatically be assumed to have simply worn out.

For someone with PJI after hip replacement, doctors may use a combination of clinical assessment, blood markers and aspiration of fluid from the joint to establish whether infection is present.

PJI Diagnosis: What Tests Are Used?

There is no single PJI test that can answer every case.

A doctor may begin with a physical examination and medical history, followed by blood tests such as C-reactive protein and erythrocyte sedimentation rate (ESR). Digital X-rays may also be used. When infection remains a concern, aspiration of the joint can provide synovial fluid for cell-count analysis and microbiological culture.

The results need to be interpreted together. Imaging alone, for example, cannot reliably establish every PJI and advanced scans are not routinely required for diagnosis. 

Conclusion–

In very severe PJI cases, you may need to remove the infected joint and clean it with new prosthetic implants. This is called  revision surgery and has a protracted recovery period with rehabilitation, physiotherapy and pain overall. If you have an infection and your joint does not feel normal, or there is constant pain even after surgery, please get in touch with us at Dr. Adarsh’s Clinic to learn more! 

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Frequently Asked Questions

What are the common prosthetic joint infection symptoms?

Common prosthetic joint infection symptoms include increasing pain, swelling, warmth, redness, wound drainage, fever, chills and reduced movement. If you have recently had a knee replacement, Dr Adarsh, an Orthopedic Doctor In Secunderabad can help assess whether these symptoms suggest infection.

What are the signs of infection after knee replacement?

The signs of infection after knee replacement can include worsening pain, drainage from the wound, fever and difficulty using the knee. A Top Knee Replacement Surgeon in Hyderabad can evaluate persistent symptoms and determine whether further testing for PJI is needed.

How is a PJI infection diagnosed?

PJI diagnosis may involve a physical examination, blood tests, X-rays and analysis of fluid taken from the affected joint. If you have concerns following hip surgery, a Robotic Hip Replacement Surgeon in Hyderabad can assess the joint and determine whether further investigation is appropriate.

Is PJI treatment possible without removing the joint replacement?

In selected cases, surgery to clean the joint and remove infected tissue while retaining the implant may be considered. The decision depends on factors such as the timing and type of infection, the condition of the implant and the organism involved, and an Orthopedic Doctor In Begumpet can help determine the appropriate next step.

What is the treatment for an infected hip or knee replacement?

Treatment may involve surgery, antibiotics or a combination of both, depending on the individual infection. Patients seeking specialist assessment may consult a Best Robotic Hip Replacement Surgeon in India, particularly when infection occurs after joint replacement.