Comprehensive Study Guide for Arthritis and Total Joint Arthroplasty
Arthritis Foundations and Terminology
Definition of Arthritis: Inflammation of one or more joints.
Mobility Focus: Primarily associated with Osteoarthritis (OA).
Immunity Focus: Primarily associated with Rheumatoid Arthritis (RA).
Interrelated Concepts: Pain and Inflammation are central to both conditions.
Key Terminology:
Osteoarthritis (OA): A degenerative joint disease often referred to as "wear and tear."
Rheumatoid Arthritis (RA): An autoimmune inflammatory joint disease.
Crepitus: A grating, crackling, popping, or grinding sound occurring during joint movement.
Joint Effusion: The presence of excess fluid within a joint.
Osteophytes: Bony growths also known as bone spurs.
Synovitis: Inflammation affecting the synovial membrane.
Subluxation: A partial dislocation of a joint.
Arthrocentesis: A procedure involving the removal of synovial fluid from a joint for diagnosis or symptom relief.
Osteonecrosis: Bone tissue death resulting from a loss of blood supply.
Total Joint Arthroplasty (TJA): The surgical replacement of a joint.
Primary Arthroplasty: The initial joint replacement surgery.
Revision Arthroplasty: Surgery performed to replace a failed or worn-out prosthesis.
Peripheral Nerve Block (PNB): Regional anesthesia used during surgery to manage pain.
Paresthesia: Sensations of tingling or burning.
Osteoarthritis (OA): Degenerative Joint Disease
Nature of the Disease: It is the most common form of arthritis and is characterized as a degenerative disorder resulting in the loss of cartilage and bone.
Classification:
Primary OA: Linked to aging and genetic factors.
Secondary OA: Triggered by joint injury or obesity, often at a younger age.
Commonly Affected Areas: Knees, hips, spine, and hands.
Risk Factors:
Aging: Identified as the single biggest risk factor.
Obesity: Increases mechanical stress on joints.
Previous Joint Injury: Predisposes the joint to later degeneration.
Repetitive Joint Stress: Often related to sports or specific occupations.
Genetics: Inherited predisposition to cartilage weakness.
Pathophysiology: Cartilage wears away, leading to a narrowing of the joint space. This causes bone to rub against bone, triggering the formation of osteophytes (bone spurs) and subsequent joint inflammation.
Assessment Findings:
Chronic Joint Pain: The hallmark symptom.
Stiffness: Typically occurs in the morning and lasts < 30\,\text{minutes} .
Pain Characteristics: Symptoms worsen with activity and improve with rest.
Mechanical Signs: Crepitus, decreased Range of Motion (ROM), and visibly enlarged joints.
Specific Hand Findings:
Heberden Nodes: Located at the Distal Interphalangeal (DIP) joints (Memory trick: "Heberden = High").
Bouchard Nodes: Located at the Proximal Interphalangeal (PIP) joints (Memory trick: "Bouchard = Below").
Diagnostic Findings and Medical Management for OA
Laboratory Findings: Tests are usually normal. The CBC is normal and Rheumatoid Factor (RF) is negative. There may be a slight elevation in Erythrocyte Sedimentation Rate (ESR) or C-Reactive Protein (CRP).
Diagnostic Tests:
X-Ray: Shows joint space narrowing, osteophytes, bone thickening, and cartilage loss.
MRI: Utilized when more precise detail is required.
First-Line Pharmacological Management:
Acetaminophen (Tylenol): The primary treatment for pain.
Safety Limits: Maximum dose is , but older adults should often stay below . Liver enzymes must be monitored.
NSAIDs: Used for both pain and inflammation. Must be taken with food.
Examples: Ibuprofen, Naproxen, Diclofenac gel.
Celecoxib (Celebrex): Avoid in patients with kidney disease or heart palpitations. It causes vasoconstriction and increased platelet clumping.
Monitoring: Check for GI bleeding, kidney injury, and cardiovascular events.
Topical Diclofenac Gel: Apply precisely as directed; do not use heating pads as they may increase absorption to toxic levels. It may take up to to show effectiveness.
Intra-Articular Injections:
Corticosteroids: Used to decrease inflammation and relieve pain.
Hyaluronic Acid (HA): Lubricates the joint to improve mobility.
Nonpharmacologic Interventions:
Exercise: Considered the most important intervention. Includes walking, aquatic therapy, and strengthening exercises.
Weight Loss: Essential for decreasing joint stress and pain.
Heat vs. Cold: Heat is generally better for OA because it relaxes muscles and reduces stiffness. Cold is reserved for instances where active inflammation is present.
Regenerative Therapies: Includes Stem Cell Therapy and Platelet-Rich Plasma (PRP). PRP is rich in growth factors it stimulates cartilage regeneration, especially in the knee.
Comparative Analysis: OA versus Rheumatoid Arthritis (RA)
Cause: OA is Degenerative ("wear and tear"); RA is Autoimmune/Inflammatory.
Typical Age of Onset: OA occurs in patients > 60 ; RA occurs in patients aged .
Symmetry: OA is often unilateral; RA is bilateral and symmetrical.
Joint Types: OA affects weight-bearing joints (hips, knees) and the spine; RA begins in small joints (hands/wrists).
Morning Stiffness Duration: OA stiffness lasts < 30\,\text{minutes} ; RA stiffness lasts > 1\,\text{hour} .
Systemic Symptoms: Absent in OA; present in RA (fever, fatigue, organ involvement).
Rheumatoid Factor: Negative in OA; Positive in RA.
ESR: Normal or slightly elevated in OA; elevated in RA.
Total Joint Arthroplasty (TJA): Preoperative and General Postoperative Care
Indications: Performed when severe pain and mobility limitations exist and conservative treatments have failed.
Contraindications: Active infection, uncontrolled diabetes, severe hypertension, or significant systemic inflammation.
Preoperative Nursing:
Patient Teaching: Includes exercises, ambulation/transfer techniques, and walker/crutches use.
ERAS (Early Recovery After Surgery): Focuses on getting the patient out of bed early. The typical stay is .
Screening: Assess for delirium risk, nutritional status, and infection risk.
Medication Management: Patients must stop NSAIDs, anticoagulants, and antiplatelets before surgery.
Infection Prevention: CHG bath before surgery, Nasal mupirocin if ordered, use of clean linens, and no sleeping with pets.
Surgical Prophylaxis: Preoperative antibiotics like Cefazolin or Cefuroxime are given to prevent infection.
Priority Postoperative Assessments:
Neurovascular Checks (The 6 P's): Pain, Pallor, Pulselessness, Paresthesia, Paralysis, and Pressure. Assess color, temperature, pulses, capillary refill, movement, and sensation frequently.
Total Hip Arthroplasty (THA): Specific Surgical Recovery
Postoperative Priorities: Preventing hip dislocation is critical.
Positioning: Maintain neutral alignment and hip abduction using an abduction pillow, especially for older or confused patients.
Hip Dislocation Precautions (Posterolateral Approach):
The Rule: "Don't Bend, Cross, or Twist."
Avoid crossing legs, adduction, and internal rotation.
No hip flexion > 90^{\circ} .
Signs of Hip Dislocation: Sudden severe pain, leg shortening, internal or external rotation, inability to move the leg, or a "popping" sensation.
Venous Thromboembolism (VTE) Prevention: The most common serious complication after THA/TKA.
Risk Factors: Age, obesity, smoking, history of VTE.
Interventions: Early ambulation, Sequential Compression Devices (SCDs), anticoagulants, and leg exercises.
Anticoagulation Meds: Low Molecular Weight Heparins (Enoxaparin, Dalteparin) and Factor Xa Inhibitors (Rivaroxaban, Apixaban, Fondaparinux).
Immediate Post-Op Exercises: Quad sets (pushing knees into bed), Gluteal sets (tightening buttocks), Ankle pumps (plantar/dorsiflexion), and straight leg raises.
Discharge Teaching: Use a walker and raised toilet seat. Call for sudden chest pain, shortness of breath (signs of PE), or suspected dislocation.
Total Knee and Shoulder Arthroplasty
Total Knee Arthroplasty (TKA):
Indication: Severe OA, obesity, RA, or post-traumatic arthritis.
Post-Op Positioning: Keep the leg in a neutral position; do not place a pillow under the knee.
Cryotherapy: Used to decrease swelling, pain, and hematoma formation.
Continuous Passive Motion (CPM): Used during rehab to improve knee flexion and ROM.
Medications: Anticoagulant therapy should start within and continue for .
Total Shoulder Arthroplasty:
Abduction Immobilizer: Use an abduction pillow/immobilizer device post-surgery. Do not remove it unless instructed by the surgeon.
Monitoring: Perform frequent neurovascular checks and monitor for dislocation.
Rheumatoid Arthritis (RA): Pathophysiology and Clinical Manifestations
Epidemiology: Affects approximately people, predominantly white women. Linked to genetic/environmental factors and the Epstein-Barr virus.
Pathophysiology: A chronic, progressive, systemic autoimmune disease where antibodies attack the synovium. This leads to inflammation, pannus formation, and eventually cartilage and bone destruction.
Clinical Course: Characterized by remissions and exacerbations.
Early Signs and Symptoms:
Joint Symptoms: Symmetrical, bilateral pain, warmth, swelling, and tenderness. Commonly affects MCP, PIP, and wrist joints.
Systemic Symptoms: Fatigue, weakness, low-grade fever, weight loss, and anorexia.
Late Findings:
Deformities: Swan Neck (hyperextension of PIP), Boutonnière (flexion of PIP), and Ulnar Deviation (fingers drift outward).
Systemic Late Signs: Osteoporosis, muscle atrophy, vasculitis, and subcutaneous nodules.
RA Complications:
Sjögren Syndrome: A chronic triad of dry eyes, dry mouth, and dry vagina.
Vasculitis: Inflammation of blood vessels leading to organ damage, skin ulcers, and ischemia.
Cervical Subluxation: A life-threatening complication resulting in spinal cord compression. If neck pain develops, notify the provider immediately and keep the neck neutral.
Diagnostic Evaluations and Labs for RA
Rheumatoid Factor (RF): Often positive but not enough for diagnosis alone.
Anti-CCP Antibody: Most specific test for RA. High levels indicate aggressive disease and joint erosion.
C-Reactive Protein (CRP/hsCRP): Elevated; more sensitive than ESR for measuring active inflammation.
Arthrocentesis (Joint Aspiration):
Purpose: Diagnostic and symptom relief (reduces pressure).
Findings in RA: Increased volume, cloudy fluid, and increased WBCs.
Post-Procedure Care: Rest the joint for , apply ice, and monitor for increased swelling.
CBC Findings: Mild anemia (low Hgb, Hct, RBC) and potential thrombocytosis in late RA. High WBCs indicate inflammation or Felty Syndrome.
Pharmacological Treatment of Rheumatoid Arthritis
DMARDs (Disease-Modifying Antirheumatic Drugs): Essential to slow disease progression and prevent joint destruction.
Methotrexate (MTX): First-line DMARD. Slow acting (). Given once weekly. Side effects include bone marrow suppression, hepatotoxicity, and infection. Avoid alcohol and sick people. Pregnancy Alert: Causes birth defects.
Hydroxychloroquine (Plaquenil): Used for mild RA. Main adverse effect is retinal damage. Requires baseline and every- eye exams.
Biologics (TNF and IL-6 Inhibitors):
Examples: Etanercept, Infliximab, Anakira, Tocilizumab.
Safety Alert: Significant infection risk. Patients must have a negative PPD/TB screening before starting therapy.
JAK Inhibitors: Examples include Tofacitinib and Baricitinib. Tofacitinib carries an increased risk for blood clots, cancer, and cardiovascular events.
Glucocorticoids (Prednisone): Used as "bridge therapy" for acute flares. Long-term risks include diabetes, osteoporosis, hypertension, and glaucoma.
RA Management: Joint Protection and Lifestyle Continuity
Nonpharmacologic Care:
Acute Inflammation: Use rest, ice, and proper positioning.
Chronic Stiffness: Use heat, warm showers, or paraffin wax treatments.
Energy Conservation: Alternate activity with rest, take naps, pace activities, and delegate tasks to avoid overexertion.
Joint Protection Techniques:
Use large joints instead of small ones (e.g., purse strap over shoulder, not in hand).
Use both hands to lift objects.
Sit in high-backed chairs.
Bend at the knees, not the waist.
Avoid twisting, wringing objects, or repetitive stress.
Psychosocial Management: Address depression, anxiety, and body image changes by encouraging independence, promoting decision-making, and focusing on strengths.