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Minimally Invasive Knee Replacement Surgery

By Published On: December 9, 2020Last Updated: July 17, 20211645 words8.2 min read
Minimally Invasive Knee Replacement2021-07-17T12:36:02-10:00

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Content

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Am I a Candidate for Total Knee Surgery?
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Diagnosis
Anterior total hip replacements
Total Knee Replacement
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Recovery
Imflammmation

Realistic Expectations

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Frequently Asked Questions
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What should I expect with my total knee?

There is no reason to sacrifice your lifestyle when it comes to your knee pain. We use our knees every day when we sit, stand, or play with our children. Sometimes, our knees wear out due to injury, illness, or the normal aging process. When your knees become worn, your everyday movements can be painful and difficult.

With robotic knee replacement, I believe we are able to have our patients have their implants placed more accurately, with less soft-tissue injury and faster recovery.

You do not have to live with your aching knees. A knee replacement can help you maintain your quality of life. If your life is limited because of knee pain, you may be a candidate for knee replacement surgery.

Old man

Am I a Candidate for Knee Replacement Surgery?

When you have failed non-operative treatment for arthritis, you should consider a knee replacement. Non-operative treatment includes injections, anti-inflammatory medications, or exercise.
The goal of a knee replacement surgery is to alleviate your pain and improve function. The best time to think about surgery is when you are having difficulty with the following scenarios:

  • Your daily living activities: household chores and grocery shopping
  • Leisure activities: golf, gardening, long walks, bike riding
  • Loss of ability to work due to pain
  • Avoidance of seeing friends or family
Am I a candidate for Knee Replacement surgery?

Diagnosis

I will make the diagnosis of arthritis through history and physical exam. An x-ray will be performed in the clinic. The x-rays in someone with arthritis typically show cartilage loss and bone spur growth. The common term we use to describe arthritis is“bone-on-bone.” This term refers to the damage and loss of cartilage between your thigh and shin bones. Bone-on-bone arthritis occurs when you have severe arthritis.

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Knee Replacement

When you have failed non-operative treatment for arthritis, you should consider a knee replacement. Non-operative treatment includes injections, anti-inflammatory medications, or exercise.
The goal of a knee replacement surgery is to alleviate your pain and improve function. The best time to think about surgery is when you are having difficulty with the following scenarios:

  • Your daily living activities: household chores and grocery shopping
  • Leisure activities: golf, gardening, long walks, bike riding
  • Loss of ability to work due to pain
  • Avoidance of seeing friends or family. A total knee replacement is a surgery that removes the damaged parts of your knee, which is replaced with an artificial joint. Your new knee is composed of metal and plastic. During the surgery, the metal is solidly fixed to the end of your thigh bone and your shin bone. Your knee replacement is made of a highly-engineered plastic, called polyethylene, that is inserted between the two pieces of metal. The kneecap is also replaced with a small plastic button. I may also consider you a candidate for a partial knee replacement, and will discuss this during your visit.
Total knee Replacement

What’s the Recovery Like for a Total Knee or a Knee Replacement?

As the operation is over, you will use your new knee. Most patients begin to walk on the day of surgery with the help of a physical therapist. Your physical therapist will show you how to walk again with a walker as you are recovering. As your muscles heal, you will have some pain. During the first couple of weeks your pain and motion will improve. Over time, you will regain your strength.  Pain after a knee replacement usually resolve over the next few weeks to months. We will provide you with pain medication after surgery and monitor you, making sure that you are comfortable.

What's the Recovery Like for a Total Knee?
What are my goals after Surgery?

Six weeks after surgery, most patients with sedentary jobs may return to work. Often, patients are able to walk comfortably by 3 months. Full recovery usually occurs at one year, but may take up to 2 years to have all of your aches and pains improve after knee replacement

Knee replacements are designed to allow you to enjoy many activities such as long walks, dance, playing golf, gardening, and riding a bicycle. Knee replacements have an excellent track record for improving your quality of life, reducing your pain, and providing independence.

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Realistic Expectations

When you are deciding to have a total knee replacement, you must understand the limitations to what the implant can do. Most people who have a total knee replacement have a dramatic reduction in their knee pain and a significant improvement in the ability to perform everyday activities. However, with normal activities, you will slowly wear the plastic piece in your knee replacement. The wear and tear can be sped up with excessive activity or weight. Damage to the plastic piece will cause the knee replacement to loosen or become painful. I agree with the American Academy of Orthopedic Surgeons and the American Association of Hip And Knee Surgeons in advising my patients to avoid running, jogging, jumping or other high-impact activities with a knee replacement.

Risks

We have high success rates with our knee replacements. However, a knee replacement is a major surgery. There are many possible risks associated with your surgery including:

  • Blood clots
  • Blood loss
  • Infection
  • Implant loosening
  • Fracture
  • Knee stiffness
  • Nerve or blood vessel damage

Dr. Morton does his best to limit the complications of surgery. To learn about improvements in this area, talk with him about robotic joint replacement surgery.

Talk with Dr. Morton About Knee Replacement

Dr. Morton is one of the few orthopedic surgeons in Honolulu, Hawaii who is fellowship-trained in hip and knee reconstruction. He regularly takes care of complicated knee replacements, performs robotic knee replacements, total knee replacements, partial knee replacements, and revision knee hip replacements. He performs surgery at Queen’s Medical Center which has received Advanced Certification for total hip and total knee replacement from the Joint Commission and is the only hospital in the state of Hawaii that is rated as “High Performing” by US News.  If you are suffering from hip pain, schedule an evaluation today!

High Performing in Orthopedics, Hip Replacement and Knee Replacement
Advanced Certification in Total Hip and Total Knee Replacement from The Joint Commission

Frequently Asked Questions About Knee Replacement (FAQ)

Does knee replacement require an overnight stay?2021-02-28T20:44:57-10:00

Some facilities deem an overnight stay as an “outpatient knee replacement”. Some of our patients may elect to stay overnight or may have medical problems that preclude them from going home on the same day. We do allow many of our healthier patients to go home on the same day as their surgery.

How will I know if I am safe to go home after my knee replacement?2021-02-28T20:44:34-10:00

Your medical history will be carefully evaluated to ensure that you are a good candidate to return home on the same day after your knee replacement. After a discussion with your physician, we will decide if you can return home safely. We make sure that all of our patients work with a physical therapist to ensure that they can safely navigate the obstacles in their home before being discharged.

Can I go home on the same day as my knee replacement?2021-02-28T20:43:08-10:00

Your surgeon will evaluate your medical history and see if you are a good candidate to return home on the day of surgery. With modern medicine, anesthesia, and surgical technique, many of our patients are able to return on the same day as their knee replacements.

Do I need a card when I go to the airport? Will I set off the metal detectors?2021-02-28T18:05:01-10:00

You do not need a card after your new knee replacement. After all, if you were a terrorist – they would still have to scan you. They will still let you fly, even if you don’t have a card. You will have to let the TSA agent know that you have a metal implant in your knee.

Is blistering around my incision normal after knee replacement?2021-02-28T18:04:40-10:00

Blistering can be a side effect of the bandages or swelling after your replacement. Blistering is a rare phenomenon. If you have blistering, please call me to make sure that there are no complications to be concerned about.

Is bruising normal after knee replacement?2021-02-28T18:04:23-10:00

Yes. In order to implant your new knee, we have to move the muscles and soft tissue to the side. Cutting the bone can cause a significant amount of blood flow. This will cause a large amount of bruising and discoloration after surgery.

My friend got a Continuous Passive Motion (CPM) machine after surgery. Why didn’t I get one?2021-02-28T18:04:04-10:00

These devices have fallen out of favor in the orthopedic community. We have found that these devices are expensive and have not made a difference in return to motion after a knee replacement. These have not been used for years by most orthopedic surgeons.

I have numbness on the outside of my knee after my replacement. Is this normal?2021-02-28T18:03:46-10:00

During a knee replacement, we cut through the infra-patellar branch of the saphenous nerve. This nerve is responsible for the sensation on the outside of your knee. This usually disappears slightly with time, but you will always have a numb area there. Some patients can develop a painful neuroma. I am happy to talk about any of your concerns about this numbness.

When can I return to work after surgery?2021-02-28T18:03:28-10:00

This is a complex question depending on what job type you are doing.

Desk job: I tell most patients that they will feel well enough to begin working around two-weeks after surgery. Some patients who are hung-ho will even start working immediately after surgery.

Light Labor: Light labor that requires frequent walking or light lifting. Some patients may require 6 weeks to 3 months before returning to work. Close monitoring will be needed to help you determine when you are safe.

Heavy labor: Construction and other types of manual labor usually requires at least 3 months of recovery. Some patients will have to change their career depending on their demands. Talk with your surgeon before returning to work.

How quickly will I be up after a knee replacement?2021-02-28T18:03:01-10:00

We have our patients walking on the same day. patients who are expected to go home will have a course of physical therapy in the post-op unit to ensure that they are safe to go home.

When can I drive after a knee replacement?2021-02-28T18:02:37-10:00

This depends on if you drive a manual transmission car, and if your replacement involves your right or left knee. Patients who undergo a right knee replacement are going to take longer to start driving – sometimes up to 6 weeks.

I allow patients to drive when they reach the following goals: 1. No significant pain while driving, 2. No longer taking narcotics, 3. Able to stop in the event of an emergency such as a small child crossing the road.

Most patients are able to achieve this with a left knee replacement around two-weeks after surgery.

Do I need to go to a skilled nursing facility or rehab after knee replacement?2021-02-28T18:02:11-10:00

Modern knee replacements are performed on an outpatient basis. Many patients are able to go home on the same day, and sometimes the following day. This is because our pain control and anesthesia have significantly improved. Some patients who do not have adequate support at home will require a skilled nursing facility to recover until they are strong.

Do I need custom implants for my joint replacement?2021-02-28T18:01:17-10:00

Custom implants and customized jigs are a technology that has not demonstrated to have brought significant value for patient outcomes. These devices have not been demonstrated to be more reliable than traditional knee replacements. It is likely because it does not take into account your soft-tissue anatomy at the time of surgery. This is the difference that robotic joint replacements provide.

How close before surgery can I have an injection in my knee?2021-02-28T18:00:18-10:00

While the science is conflicting on whether injections are associated with infected knee replacements, many insurance companies have made limitations on joint replacements after injections. If you have an injection, most insurance companies will not support payment for a knee replacement for 3 months after your injection. This is with the health of our patients in mind. Avoidance of infection is of utmost importance as an infection can have devastating consequences.

Is it necessary to have a robot assist with the surgery?2021-02-28T17:59:30-10:00

Robotic joint replacements are a hot-topic in hip and knee replacements. While you may not need a robot to perform your surgery, robotic knee replacements are able to provide a much more accurate positioning of your knee replacements and personalize the implantation to your anatomy. Much like anterior hip replacements are able to position our implants better and improve outcomes, I believe that robotic joint replacements can make the same improvements for knee replacements.

Should I have a partial (uni) or total knee replacement?2021-02-28T17:58:52-10:00

Partial and total knee replacement surgery have excellent track records. There are risks and benefits to both operations. Partial knee replacements often leave patients with a more “natural feeling” knee, while total knee replacements are able to provide the longest term result with lower risk of re-operation.

When can I go to the dentist after my knee replacement?2021-02-28T17:58:25-10:00

I usually recommend that people wait three months prior to having any dental work done. Please ask for antibiotics, especially within the first year of your surgery.

Should I quit smoking before my joint replacement?2021-02-28T17:57:47-10:00

Tobacco use is known to be a significant risk factor for loosening, infection, or wound healing problems. Minimizing your tobacco use or quitting before surgery will make a significant impact. If you are able to quit for life, you will significantly reduce your risk of other complications to your overall health as well. Learn more about tobacco effects on joint replacements here.

Should I have bariatric surgery before my knee replacement?2021-02-28T17:57:24-10:00

Some patients find that once they lose a significant amount of weight after bariatric surgery, they do not need to see an orthopedic surgeon for a knee replacement. If you are able to successfully lose enough weight before surgery, you may also reduce the chance of a complication after your surgery. Obtaining a healthy weight should be your goal.

Do I need to get my bad teeth fixed before surgery?2021-02-28T17:57:07-10:00

Infections in your mouth are a significant risk factor for a knee replacement infection. We recommend that any evidence of a dental or gingival infection be addressed prior to surgery. Some clinics even require mandatory dental clearance prior to surgery. After surgery, we will often provide patients with antibiotics prior to deep cleaning or any major dental work.

Should I lose weight before knee replacement surgery?2021-02-28T17:56:41-10:00

Even if you feel fit and healthy, you may be asked to lose weight before knee replacement surgery if you are heavier. Much of the research on complications following knee replacement surgery has been focused on patients with a high body mass index (BMI). In fact, Queen’s Medical Center will not allow the scheduling of any surgery of patients with a BMI greater than 40. This is because patients who are heavier are at higher risk for the following complications:

– Infection

– Component loosening

– Poor wound healing

– Blood clots

– Pulmonary embolism (blood clot travels to the lung)

Typically, we ask patients to aim for a BMI that is less than 40 prior to surgery. We would prefer patients to obtain a BMI less than 35 as this will significantly lower your risk profile.

Can I run or jog after a knee replacement? What kinds of sports activities can I be involved in?2021-02-28T17:56:16-10:00

Running can put a tremendous amount of stress across your new implant. I would be very careful before starting a heavy-exercise program on your new knee replacement. Despite this, you can still be an athlete and do certain types of activities. The American Academy of Orthopaedic Surgeons (AAOS) recommends the following activities with a total knee:

– Bicycling

– Calesthetics

– Swimming

– Low-resistance rowing

– Gentle Skiing

– Walking & Hiking

– Low-resistance weightlifting

Similarly, the AAOS advises against high-impact activities:

– Baseball

– Basketball

– Football

– Hockey

– Soccer

– High-impact aerobics

– Gymnastics

– Running and Jogging

– Powerlifting

Am I too young for a knee replacement surgery?2021-02-28T17:55:53-10:00

Traditionally, knee replacements were reserved for patients who were elderly with severe knee arthritis. Concerns regarding patients who undergo knee replacement at a younger age are focused on the wear of the knee replacement components. Any patient who is in their 40’s and 50’s is considered “young” for a knee replacement. However, they may still be a candidate for a knee replacement if they understand the limitations of the implant and have failed non-operative treatment.

The average age of patients today undergoing a knee replacement is 65 years old. While patients under the age of 50 are the fastest-growing segment of the population undergoing knee replacement surgery, many orthopedic surgeons have reservations.

How long does a knee replacement last?2021-02-28T17:55:30-10:00

Modern knee replacements have made a drastic improvement with the invention of highly cross-linked polyethylene. Polyethylene is the plastic component within your knee replacement. Traditionally, these plastic components are expected to last up to 20 years in 90% of people. With newer plastic components, we are hopeful that knee replacements will last even longer.

There are newer knee components including those made from Vitamin E or ceramic, which may reduce the wear of the plastic component.

The length of time that a knee replacement will last is variable. While the current generation of knee implants are expected to last most of our patient’s lifetimes. Orthopedic surgeons worry that high levels of activity, weight, or other complications such as infection or loosening could lead to the need for revision.

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Meet Dr. Paul Norio Morton

Dr. Paul Norio Morton, MD is a board-certified, fellowship-trained orthopedic surgeon in hip and knee surgery, specializing in robotic joint replacements, complex joint reconstruction, sports injuries, and trauma. Reach out to him to learn more about treatment options for your problem.

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