Knee replacement surgery: All you need to know

Written in association with: Mr Akash Patel
Published: | Updated: 07/01/2025
Edited by: Aoife Maguire

Knee replacement surgery, also known as knee arthroplasty, is a common procedure aimed at improving the quality of life for those experiencing severe knee pain and limited mobility. For many, it offers a new lease on life by restoring function and reducing discomfort. If you or a loved one are considering this surgery, it’s important to understand the process, what to expect, and how it can benefit you.

 

Leading consultant orthopaedic surgery Mr Akash Patel explains all you need to know about the surgery.

 

 

Why might someone need a knee replacement?

 

The primary reason for knee replacement surgery is severe pain and stiffness in the knee joint, often caused by arthritis. Osteoarthritis, the most common form, occurs when the cartilage that cushions your knee wears away, leading to bone-on-bone contact. This can result in pain, swelling, and a restricted range of motion. Other conditions such as rheumatoid arthritis, which involves inflammation of the joint, or injuries like fractures can also necessitate this surgery.

 

For many patients, non-surgical treatments like medication, physical therapy, injections or lifestyle changes are effective initially. However, when these measures no longer provide relief, and daily activities become difficult or impossible, a knee replacement may be recommended.

 

What happens during the procedure?

 

Knee replacement surgery involves removing the damaged parts of the knee joint and replacing them with artificial components made of metal or plastic. These components are designed to replicate the movement and function of a natural knee.

 

The procedure typically takes one to two hours and is performed under anaesthesia. The surgeon makes an incision over the knee, removes the damaged tissue, and carefully fits the artificial components. The new joint is secured in place, and the incision is closed with sutures or staples.

 

What is recovery like after surgery?

 

Patients usually stay in the hospital for 24 to 48 hours to ensure their pain is well-managed and to begin physiotherapy. Physiotherapy is essential for restoring strength and movement in the knee.

 

Most patients can resume light activities within six weeks. However, full recovery may take up to 12 months, usually less. It’s essential to follow your rehabilitation plan, which may include exercises to improve flexibility and walking with support such as crutches or a cane.

 

Are there risks involved?

 

As with any surgery, knee replacement carries some risks, including infection, blood clots, or stiffness in the joint. However, advancements in surgical techniques have significantly reduced complications, and most patients experience successful outcomes.

 

Your surgeon will discuss your medical history and any factors that might increase risks, such as obesity or other chronic conditions, to ensure you are a good candidate for the procedure.

 

Is knee replacement right for you?

 

Deciding whether to undergo knee replacement surgery is a personal decision that depends on the severity of your symptoms and how they affect your quality of life. Consulting with your doctor and asking questions can help you make an informed choice about this life-changing procedure.

 

 

If you require knee replacement surgery and would like to book a consultation with Mr Patel, do not hesitate to do so by visiting his Top Doctors profile today.

By Mr Akash Patel
Orthopaedic surgery

Mr Akash Patel is a consultant trauma and orthopaedic surgeon based in London and is an Associate Professor (University College London). He specialises in knee arthroscopy, hip arthroscopymeniscal repairACL reconstructionhip replacement and knee replacement. He privately practices at St John & St Elizabeth Hospital, the Royal Free Hospital - Private Patient Unit and BMI The Kings Oak Hospital as well as The Wellington Hospital. His NHS base is the Royal Free London NHS Foundation Trust.

Mr Patel, who is double-fellowship trained, prides himself in providing the best-possible outcomes for his patients while using evidence-based technologies and enhanced recovery techniques. He also utilises innovative, non-invasive treatments for management of hip and knee disorders including biologics (PRP) and bracing.

Mr Patel is highly qualified and double-fellowship trained. He graduated from University College London (UCL) with an MBBS (2005) and a BSc (Hons) in Neuroscience. Following this, he undertook trauma and orthopaedic training on the Imperial Northwest London rotation. Towards the end of his training, he was awarded various fellowships including international ones in locations including Australia, Switzerland and South Africa. Mr Patel also has an MSc in Evidence-Based Orthopaedics from Warwick University.

Complementing his prestigious and well-earned clinical and academic career, Mr Patel is an Associate Professor at University College London and an honorary senior lecturer for Imperial College Healthcare NHS Trust. Furthermore, his keen interest in advanced orthopaedic training for all healthcare professionals is reflected in his roles as an advanced trauma life support instructor for the Royal College of Surgeons of England and director for multiple national orthopaedic masterclass surgical training courses. 

Mr Patel has written various research papers that have been published in peer-reviewed journals, is a fellow of the Royal College of Surgeons (England) and underwent prestigious specialist fellowships at Royal Berkshire and Royal Free London Hospitals. 

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