Locomotor Flashcards
Osteoarthritis
Degenerative condition in which cartilage of the joint wears away. AKA Degenerative Arthritis
How common is osteoarthritis
Females 3x more than males
>50yo
Causes of Primary Osteoarthritis
Aging. With aging, the water content of the cartilage increases and the protein makeup of cartilage degenerates.
Causes of Secondary Osteoarthritis
Rheumatoid arthritis, gout, septic arthritis, Paget’s disease of bone, Avascular necrosis, metabolic disease e.g. acromegaly, systemic disease
Process of Osteoarthritis
Cartilage wears and degenerates.
Cartilage ulceration exposes underlying bone to stress, producing microfractures and cysts.
Bone attemts repair but produces sclerotic bone and overgrowths at joint margins calles osteophytes
Macrophages releases VEGF leading to vascularisation of the joint
Risk factors for Osteoarthritis
Genetics, increased age, female, obesity, joint injury, occupational, reduced muscle strength, joint laxity, joint misalignment, osteoporosis
Symptoms of Osteoarthritis
Joint pain, RELIEVED BY REST, WORST ON EXERCISE,joint stiffness in the morning lasting no longer than 30mins, joint instability, localised disease
Signs of Osteoarthritis
Joint tenderness Polyarticular (affects more than 5 joints) Crepitus Limitation decreases range of movement Heberdens nodes at DIP Bouchard's notes at PIP Synovitis
Differentials for Osteoarthritis
Rheumatoid arthritis (morning stiffness lasting < 30 mins, symmetrical joint pain) Gout Ankylosing spondylitis Septic Arthritis Bursitis
Investigations for Osteoarthritis
Rheumatoid Factor and anti-nuclear antibody negative
CRP normal
ESR normal
X-ray finding in Osteoarthritis
LOSS Loss of Joint Space Osteophytes Subchondral Cysts Sclerosis
Drugs for Osteoarthritis Pain
Acetaminophen
NSAIDS e.g ibuprofen, diclofenac
Duloxetine (antidepressant)
Treatment for Osteoarthritis
Exercise to increase muscle mass and strength around knee Weight loss Cortisone injections Lubrication injections Realigning bones Arthroplasty (joint replacement)
Prognosis for Osteoarthritis
Most people with OA do not become severely disabled but knee OA holds the worst prognosis and hand the best
Rheumatoid Arthritis
Autoimmune disease causing symmetrical polyarthritis and synovial inflammation. Type 3 hypersensitivity reaction
How common is RA
Females 2x more than Males
Onset 50-60yo
Causes of RA
Genetics: familial pattern with high concordance in monozygotic twins
Gender
Immunology: synovial Inflammation due to T cell Activation
Pathology of RA
Synovium shows: Increased angiogenesis Cellular hyperplasia Influx of inflammatory cells Cytokines High level of metalloproteinase
Symptoms of RA
Symmetrical, Deforming, Peripheral, Polyarthritis, Joint pain, WORST AT REST, BETTER WITH EXERCISE, morning stiffness, affect mainly hands and feet then progresses to larger joints, fatigue and weakness
Signs of RA on the Hand
Ulnar deviation of the finger and dorsal wrist subluxation
Boutonniere or swan neck deformity of fingers
Z deformity of the thumb
Raynauds
Carpal Tunnel syndrome
Investigations for RA
ESR, CRP and platelets raised
RF and anti-CCP antibodies positive
Nomochromic normocytic anaemia
X-ray: bony erosion, subluxation, carpal instability, joint involvement
Differentials for RA
Osteoarthritis SLE Gout Psoriatic arthritis Infectious arthritis
Treatment for RA
DMARDs (Disease Modifying Antirheumatic Drugs): Methotrexate (mmunosuppresant), Hydroxychloroquine (anti-malarial), Sulfasalazine (aminosalicylate) NSAIDS Glucocorticoids Exercise, physiotherapy Arthroplasty surgery