Total Knee Replacement FAQ

Common questions after a total knee replacement.

How long does a knee replacement last? How long do knee replacement last? How long does knee replacement last?

Knee replacement surgery aims to greatly enhance quality of life for patients suffering from intense knee pain and limited mobility. Due to continuous progress in surgical techniques and high-quality prosthetic materials, longevity has significantly improved. “over 85% of knee replacements maintain their functionality and remain in good condition even after 23 years since the surgery” according to data from the Australian Joint Registry.

However, durability is not exclusively determined by surgical technique and materials; patient lifestyle and behaviour play a pivotal role. Factors such as activity levels, body weight, and adherence to post-operative care and rehabilitation significantly influence implant longevity. A younger, highly active individual may experience accelerated deterioration compared to an older, more sedentary person.

It is crucial to achieve balance between engaging in physical activity to preserve joint health and refraining from activities that hasten implant deterioration.

How long does knee replacement surgery take? How long is knee replacement surgery?

The usual duration of knee replacement surgery is typically between 1 to 1.5 hours. However, the length can differ depending on case complexity, which may involve robotic assistance.

A crucial aspect involves administering anaesthesia via a needle placed in the patient’s arm. During this stage, spinal anaesthetic and femoral nerve block are administered for effective post-operative pain management. Although the surgical operation typically takes about an hour, the full process—including pre-operative preparation and recovery—requires additional time.

The surgical staff is committed to performing the procedure with maximum efficiency, accuracy, and meticulousness, ensuring optimal results. This dedication encompasses thorough preparation and post-operative recovery facilitation.

How long to recover from a knee replacement? How long is recovery from a knee replacement?

Each patient’s recovery path is unique, determined by health status, surgery complexity, and commitment to post-operative care and therapy. Here is a general timeframe:

• Hospital Stay: 2-3 nights post-surgery.
• Crutch Use: 2-4 weeks to aid in mobility.
• Pain Management: Pain medication typically required for 3-6 weeks.
• Night Pain: Possible discomfort during the night for 6-8 weeks.
• Range of Movement: Noticeable improvements within 10-12 weeks.
• Normal Walking: Achieving near-normal gait and minimal pain around 2 months.
• Swelling: Swelling may persist for 6-9 months.

Although great progress in reducing pain and improving function occurs in the first few months, “the complete advantages of knee replacement surgery may take 12-18 months to fully manifest.” This phase enables inflammation reduction and muscle reinforcement.

Regular communication with your surgeon and physiotherapist during recuperation is important. Adhering diligently to your rehabilitation plan and attending all scheduled follow-up appointments will expedite resolution of difficulties.

What helps with pain after knee replacements? What helps nerve pain after knee replacement surgery?

Experiencing discomfort following knee replacement surgery is normal as your body adjusts to the newly implanted joint. Prior to departing from hospital, your surgeon will ensure you receive essential pain treatment methods for home management. Your level of physical exertion throughout initial recovery phases can impact discomfort intensity, so activity management is imperative.

Efficient pain management measures are essential to promote seamless recovery and permit prompt return to daily activities. Here are multiple techniques:

• Medication: Your surgeon will provide pain relief medication depending on your unique requirements. Adhering to the suggested regimen is critical for pain management and inflammation reduction. Avoiding medication to tolerate pain can result in escalation that is difficult to manage.
• Ice Therapy: Frequent ice application to the knee region can substantially reduce swelling and relieve pain. Apply ice several times daily, particularly after exercising or undergoing physical treatment.
• Physical Therapy: Prescribed physical therapy exercises are crucial for strengthening surrounding muscles, improving flexibility, and reducing discomfort.
• Rest: Rest is equally important as movement. Balance between activities and sufficient relaxation provides necessary healing time.
• Compression: Compression techniques such as stockings or bandages can successfully reduce discomfort by reducing swelling.
• Pain Management Techniques: Supplementary strategies such as deep breathing, meditation, and visualisation provide further assistance in regulating post-operative pain.

Efficient pain control is a crucial element of healing. Establishing clear communication with your surgeon about pain levels is crucial for making necessary adjustments to your pain management plan.

What is the MBS code of a knee replacement?

The MBS code for total knee arthroplasty in Australia can differ depending on precise procedure characteristics. As of April 2023, the MBS item code 49518 is frequently used for complete knee replacement. This code is specifically intended for the surgical process of total knee replacement, which may also involve patella resurfacing if performed.

For more details on associated fees, please refer to the cost of knee replacement page.

Resuming Driving After Your Knee Replacement Surgery – When can I drive after a knee replacement?

Recovering the ability to drive is a crucial milestone in your rehabilitation journey, signifying return to self-sufficiency and normal daily activities. According to Australian Orthopaedic Association guidelines, “it is advisable to wait for 6 weeks after surgery.” Moreover, crucial prerequisites must be fulfilled prior to contemplating operating a vehicle:

• Cease consumption of opioid-based pain medication, as it can impair reaction times and decision-making skills.
• You must possess the ability to comfortably sit in the car and manipulate pedals without discomfort or pain.
• Your knee should have sufficiently recovered in strength and flexibility to enable safe vehicle operation, even in emergency situations.

Individuals who have had surgery on their right knee or operate manual transmission vehicles may require lengthier waiting periods due to heightened physical exertion involved in operating vehicle pedals.

Before starting driving again, conduct a test drive in a safe setting to ensure you can perform all required movements comfortably and without pain or difficulty. Safety for yourself and others is of utmost importance.

Can you run after a knee replacement? Can I jog after a knee replacement?

A common enquiry from patients concerns engaging in running or jogging activities following knee replacement procedure. As an orthopaedic surgeon, patient aspirations to resume activities such as running, jogging, tennis, or hockey are encouraged. “I strongly advocate that re-engaging in one’s passions is an essential component of the rehabilitation process and a primary motivation for undergoing this surgery.” However, it will require significant time and focused rehabilitation to restore prior physical activity levels. Although you may perceive minor differences in knee sensation, it is feasible to gradually resume these activities.

If you did not engage in running or jogging before knee replacement, it may not be practical to begin participating in these high-impact activities. Low-impact exercises such as swimming or cycling are suggested, as these exert less strain on your replaced joint. Remember that your knee replacement is a mechanical joint, and participating in high-impact activities can accelerate its deterioration compared to someone less physically active.

Understanding Pain Behind the Knee After Total Knee Replacement

Knee replacement-related pain experienced behind the joint can be distressing. This may occur primarily due to two factors:

Pre-Existing Fixed Flexion Deformity: You probably had a fixed flexion deformity associated with arthritis that prevented you from entirely extending (straightening) your leg prior to knee replacement. Although arthritis has been treated and the knee has been able to go fully straight following surgery, the surrounding tissues (muscles, ligaments, tendons) may remain stiff. It can be painful to stretch these contracted tissues as you attempt to straighten your knee. Knee replacement and arthritis progression are discussed in greater detail.

Swelling in the Knee: Swelling inside the knee after surgery can put pressure on the capsule behind the knee, which can be painful. When the knee is stretched, this swelling adds to the feeling of pain.

Patients frequently have an instinctive tendency to flex their knees slightly to alleviate these problems. Although this position may offer brief relief, frequent maintenance of this posture is strongly discouraged. Prolonged flexion can result in fibrous tissue development in the knee’s posterior aspect, potentially impeding your capacity to completely extend the knee in the future.

What Not to Do After a Knee Replacement: Key Guidelines for a Healthy Recovery

After knee replacement, it is vital to protect your new joint and guarantee smooth recovery. Here are important guidelines on what not to do after knee replacement to avoid complications and ensure long-term surgery success.

Avoid Overexertion in the Early Stages

Exercising too much during the first two weeks after surgery can be harmful. It is critical to give soft tissues enough time to heal following the operation. While you may feel better, pushing too much too soon can raise the likelihood of complications.

Gradually Increase Activity

By the two-week point, you should begin gradually increasing physiotherapy exercises. This progressive method allows your body to adjust without overly stressing the new joint.

Monitor for Signs of Infection

It is essential to be watchful for any indications of infection. Symptoms such as fever or unusual pain require swift addressing, as any infection in the body has the potential to travel to your new joint. This involves meticulously overseeing dental operations to minimise infection risks that could potentially impact your knee.

Maintain an Active Lifestyle Within Limits

While maintaining an active lifestyle is crucial, it is also imperative to be aware of your boundaries and limitations. Participating in low-impact activities such as walking, swimming, or cycling can assist in preserving your physical health without placing excessive strain on your knee. Adopting a well-balanced diet and engaging in regular physical activity is crucial for effectively managing your weight and minimising stress on your knee replacement.