Osteoarthritis is a chronic, non-inflammatory joint disease characterized by the progressive breakdown of articular cartilage. As the smooth cartilage cushions wear away, bones begin to rub directly against each other. This friction causes structural changes in the underlying bone, leading to subchondral sclerosis, joint space narrowing, and the formation of bony outgrowths called osteophytes. Synovial inflammation may also occur secondarily as cartilage debris sheds into the joint space.
Patients with osteoarthritis typically report localized joint pain that worsens with activity and improves with rest. Morning stiffness is common but usually lasts less than thirty minutes, distinguishing it from inflammatory arthropathies like rheumatoid arthritis. On physical examination, nurses may note crepitus during joint movement, bony enlargement such as Heberden's nodes at the distal interphalangeal joints, and restricted range of motion.
Diagnosis relies heavily on clinical evaluation combined with radiographic imaging. Standard X-rays of the affected joint reveal hallmark signs including joint space narrowing, subchondral sclerosis, osteophyte formation, and bone cysts. Blood tests such as complete blood count, erythrocyte sedimentation rate, and C-reactive protein are typically normal or negative, which helps clinicians rule out systemic inflammatory or autoimmune arthritis.
Pharmacotherapy focuses on pain relief and functional improvement. Acetaminophen is often the initial oral analgesic for mild to moderate pain. Nonsteroidal anti-inflammatory drugs are effective for managing moderate to severe pain accompanied by inflammation, though gastrointestinal and renal risks require careful monitoring. Intra-articular corticosteroid injections provide temporary relief during acute pain flares. Topical analgesics, such as capsaicin cream, offer localized relief with minimal systemic side effects.
Nursing interventions center on weight management, physical therapy referral, and joint protection strategies. Nurses educate clients on balancing rest with low-impact aerobic exercises, such as swimming or walking, to maintain muscle strength without overloading joints. Assistive devices like canes, walkers, or knee braces reduce weight-bearing forces during ambulation. Applying heat packs helps relax muscles and stiffness, while cold packs can numb acute joint pain.
When conservative management fails to control pain and preserve functional independence, surgical options are considered. Arthroscopic debridement may be performed to clean out loose cartilage fragments. Osteotomy realigns the bone to shift weight away from damaged joint surfaces. Total joint replacement, or arthroplasty, is the definitive surgical intervention for end-stage osteoarthritis, replacing damaged articular surfaces with prosthetic components.
Chronic pain and joint instability place patients at high risk for falls, reduced mobility, and subsequent social isolation or depression. Client education focuses on lifestyle modifications, correct posture, weight reduction, and proper body mechanics during activities of daily living. Nurses must also ensure patients understand how to safely take their prescribed medications and recognize adverse effects early.