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Knee Osteoarthritis

Knee osteoarthritis (Knee OA) is a common form of arthritis that affects the knee joint. It occurs when the protective cartilage that cushions the ends of the bones in the knee wears down over time. This can lead to pain, swelling, and reduced function in the knee. OA of the knee is a degenerative joint disease that can impact daily activities and overall quality of life.
Knee Osteoarthritis

Causes of Knee Osteoarthritis

Several factors can contribute to the development of knee OA:
  • Age: The risk of knee OA increases with age.
  • Genetics: A family history of OA can increase the risk.
  • Joint Injuries: Injuries such as fractures, ligament tears, and meniscus damage can lead to OA.
  • Obesity: Excess weight puts additional stress on the knee joints.
  • Repetitive Stress: Jobs or activities that put repetitive stress on the knee can increase the risk.

Symptoms of Knee Osteoarthritis

Common symptoms of knee OA include:
  • Pain: Knee pain that worsens with activity and improves with rest.
  • Stiffness: Stiffness in the knee, especially in the morning or after periods of inactivity.
  • Swelling: Swelling around the knee joint.
  • Decreased Range of Motion: Reduced ability to move the knee.
  • Grating Sensation: A grating or grinding sensation during knee movement.
  • Bone Spurs: Hard lumps of bone around the knee joint.

Prognosis of Knee Osteoarthritis

Knee OA is a progressive disease that tends to worsen over time. While there is no cure, early diagnosis and proper management can help control symptoms and improve function. Lifestyle changes, physical therapy, medications, and surgical interventions can significantly enhance quality of life for individuals with knee OA.

Diagnosis of Knee Osteoarthritis

Diagnosing knee OA involves a combination of medical history, physical examination, and diagnostic tests, including:

  • X-rays: To identify cartilage loss, bone spurs, and other changes in the knee.
  • MRI: Provides detailed images of the knee’s soft tissues.
  • Joint Aspiration: Fluid is removed from the knee joint for analysis to rule out other conditions.

X-ray showing arthritic knee joint.

Pain Medicine Intervention of Knee Osteoarthritis

Pain management options for knee OA include:

  • Over-the-counter pain relievers: NSAIDs or acetaminophen to reduce pain and inflammation.
  • Prescription medications: Stronger pain relievers or anti-inflammatory medications may be prescribed.
  • Topical analgesics: Creams and gels applied to the skin over the knee can provide temporary pain relief.

Treatment of Knee Osteoarthritis

Treatment focuses on relieving symptoms and improving knee function. Common treatments include:

  • Physical Therapy: Exercises to strengthen the muscles around the knee and improve flexibility.
  • Weight Management: Reducing body weight to decrease stress on the knee joints.
  • Assistive Devices: Using braces, shoe inserts, or walking aids to reduce strain on the knee.

  • Cortisone Injections: Experienced clinicians can administer cortisone shots in the knee which contain steroids to help reduce inflammation, decreasing swelling and pain in the knee.

  • Knee injections: Clinicians can inject lubricating artificial joint fluid, providing cushioning for the joint to move more easily. Relief from an injection lasts three to six months.
  • Surgical Options: In severe cases, procedures such as knee replacement surgery may be considered.

Procedure Videos

References

  1. “Knee Osteoarthritis.” Mayo Clinic Orthopedic and Sports Medicine . https://sportsmedicine.mayoclinic.org/condition/kneearthritis/ Accessed July 23, 2024.
  2. “Knee Osteoarthritis.” Cleveland Clinic. https://my.clevelandclinic.org/health/diseases/21750-osteoarthritis-knee. Accessed July 23, 2024.
  3. Osteoarthritis: Novus spine & pain center in Lakeland, Florida. Novus Spine & Pain Center. https://novusspinecenter.com/pain-conditions/osteoarthritis Accessed July 23, 2024.
  4. Osteoarthritis of the knee: Radiology reference article. Radiopaedia. https://radiopaedia.org/articles/osteoarthritis-of-the-knee?lang=us Accessed July 23, 2024.
  5. “Osteoarthritis of the Knee” Back and Pain Center https://brochure.viewmedica.com/1382/kneearthritis/en Accessed July 23, 2024.