Osteoarthritis, Crystal arthritis and Soft Tissue Rheumatism Flashcards
What is osteoarthritis?
Articular cartilage thinning or loss
Is osteoarthritis a consequence of aging?
Yes
What are some risk factors for osteoarthritis?
Age Female Obesity Previous injury Muscle weakness Proprioceptive deficits Genetic elements Acromegaly Joint inflammation Crystal deposition in cartilage
What is the pathogenesis of OA?
- Normal joint - healthy cartilage is lubricated by synovial fluid
- OA causes the cartilage to begin breaking down, making it thinner and then creating cracks in the surface
- Gaps in the cartilage can expand until they reach the bone
- Synovial fluid leaks into cracks which form in the bones surface when the replacement cartilage wears away. This causes further damage and can lead to cysts or bone deformities
- If not treated, damage can progress to the point where the bones in the joint become permanently deformed
What are the two types of OA?
Idiopathic
Secondary
What can OA be secondary to?
Previous injury
Calcium crystal deposition disease
Rheumatoid arthritis
At what sites is OA likely to occur?
Hip Knee Foot (mtp joints) Cervical spine Lumbar spiner Hand - DIP, PIP, IP, MCP, CMC
What are the symptoms of OA?
Pain - worse on activity, relieved by rest (mechanical pain)
Stiffness - Morning usually lasts less than 30 minutes
What would be seen on examination of OA?
Crepitus
Joint swelling - bony enlargements due to osteophytes
Joint tenderness
Joint effusion
What are bony enlargements at the DIPs called?
Heberdens nodes
What are bony enlargements at the PIPs called?
Bouchards nodes
What else may be seen in the hands of an OA patient?
Squaring of the hand
What may be seen in the knee of an OA patient?
Osteophytes Effusions Crepitus Restriction of movement Genu varus Valgus deformities Bakers cyst
What may be seen in the hip of an OA patient?
Pain in groin or radiating to knee
Pain in hip from lower back
Restricted hip movements
What may be seen in the spine of an OA patient?
Cervical - pain and restriction of neck movement
Lumbar - Pain on standing or walking for some time
Spinal stenosis
How is OA diagnosed?
Clinical + Radiological
- Loss of joint space
- Subchondral sclerosis
- Subchondral cysts
- Osteophytes
What are the categories for the Kellgren-Lawrence Radiographic grading scale of osteoarthritis?
Grade 0 - No radiographic findings of OA
Grade 1 - Minute osteophytes of doubtful significance
Grade 2 - Definitive osteophytes with unimpaired joint space
Grade 3 - Definitive osteophytes with moderate joint space narrowing
Grade 4 - Definitive osteophytes with severe joint space narrowing and subchondral sclerosis
Do symptoms of OA tend to improve?
Yes - not fully however
What is the non-pharmacological management of OA?
Explanation - not because of normal use
Physiotherapy - Muscle strengthening
Common sense measures - weight loss, exercise, trainers, walking stick, insoles
What is the pharmacological management of OA?
Analgesia - Paracetamol, compound analgesics, topical analgesia
NSAIDs - topical/systemic, may give additional symptomatic relief, consider risk/benefit ratio
Pain modulators - Tricyclics (amitriptyline, anti-convulsants)
Intra-articular - steroids
What is the surgical management of OA?
Arthroscopic washout, loose body, soft tissue trimming
Joint replacement
What is gout?
Inflammation in the joint triggered by uric acid crystals
What two factors contribute to purine levels?
Diet
DNA/RNA
What can lead to increased uric acid levels?
Excess consumption
Over production
Under excretion