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Clinical Outcomes and Statistics of Knee Replacement
Knee Replacement Risk
August 24, 2022Skin Numbness After Knee Replacement Surgery
August 26, 2022A total knee replacement is an effective way of improving symptoms of knee arthritis.
Also known as a total knee arthroplasty, this surgery involves replacing the knee joint with a prosthetic device that carries out similar functions as a person’s own knee.
Knee replacement surgery has become a routine procedure in many hospitals.
Positive outcomes
90 percent of people who have a knee replacement experience a significant reduction in pain.
For many, it helps them to stay active and may enable them to return to activities they previously enjoyed, such as walking and golf.
The AAOS notes that over 90 percent of replacement knees are still functioning after 15 years. According to research published in 2019, 82 percent Trusted Source of total knee replacements are still functioning after 25 years.
For most people, a successful knee replacement typically leads to a higher quality of life, less pain, and better mobility.
After a year, many report significant improvements in:
- pain
- stiffness
- physical function
- vitality
- social functioning
The authors of one study Trusted Source noted that a total knee replacement “offers profound improvements of physical activity for the majority of patients.”
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Safety and complications
Knee replacement surgery is relatively safe and effective for most people. According to the AAOS, fewer than 2 percent of people experience severe complications, such as an infection or a blood clot.
Infection
In 1981, one expert estimated that the infection rate for knee surgery was 9.1 percent Trusted Source. Newer practices of giving antibiotics before and during the operation have reduced the risk dramatically to around 1 to 2 percent.
Risk factors for infection include diabetes, obesity, and older age.
Blood clots and DVT
Blood clots can develop after surgery. These are called deep vein thromboses (DVTs). If a DVT breaks off and travels to the lungs, it results in a pulmonary embolism (PE), which can be life threatening.
One study Trusted Source found that 1.2 percent of people were hospitalized with blood clots within 90 days of total knee replacement surgery. Of these, 0.9 percent had DVT and 0.3 percent had PE, a more serious condition.
Best shoulder & Knee replacement in Jabalpur – Dr Brajesh Dadarya – ArthroMed Arthroscopy & Sports Injury Centre
Osteolysis
Osteolysis (destruction of bone) happens when microscopic plastic particles from the knee implant cause inflammation. Loosening of the knee joint can occur over time.
According to research, osteolysis is the most common reason Trusted Source for long-term failure of a total knee replacement, requiring a second (revision) operation.
Stiffness
Stiffness, or arthrofibrosis, is one of the more common complications after knee replacement surgery. It occurs when scar tissue forms in the knee and limits movement of the new joint.
The best way to avoid stiffness is to follow the exercise regimen that your healthcare providers recommend.
Pain
Pain usually reduces as a result of knee surgery. Statistics vary, but according to one estimate, 20 percent Trusted Source of people may continue to experience persistent pain despite a well-performed operation.
Revision
Revision is when a person needs a second knee replacement at some point in time after their initial operation.
Experts estimate that 5 percent of people will need a revision within the first 10 years. Of these, 29.8 percent are due to the joint coming loose, 14.8 percent due to infection, and 9.5 percent due to pain.
If a person has a high risk of complications, the surgeon will discuss this with them during the evaluation process. In some rare cases, a surgeon may not recommend surgery because the potential risks outweigh the benefits.
Takeaway
StudiesTrusted Source show that after knee replacement surgery most people experience an improvement in their:
- quality of life
- activity levels
- mobility
However, most won’t be as mobile and active as people who have never had knee problems.
Knee replacement is relatively safe, but there are risks. Knowing the risks and discussing them with your doctor can help you make your decision about whether knee surgery is right for you.
