Arthrotis Flashcards
Most common arthritis
Osteoarthritis
Step 1 osteoarthritis
Cells that produce collagen and proteoglycans becomes abnormal
Step 2 osteoarthritis
Initially increased in cartilage growth and bone density reducing space
Step 3 osteoarthritis
Cartilage thins and cracks rough cartilage causes pain during movement
Step 4 osteoarthritis
Bone starts to be worn down bone moves against bone increasing erosion and pain
Step 5 osteoarthritis
Spurs develop to compensate = deformation = joint moves incorrectly = pain
Step 6 osteoarthritis
Inflammation causes synovium to thicken ligaments become lax and muscles crossing joint over stretched causing weakness
What is rheumatoid arthritis
An autoimmune disease affecting whole body
Can affect whole body
Inflammatory cytokines (TnF) produced by macrophages May cause myocardial damage and pericarditis affecting cv function May cause pleural fluid accumulation in lungs affecting function
Stage 1 rheumatoid arthritis
T cells in synovial fluid become corrupted and unable to distinguish between foreign and normal body cells
Stage 2 rheumatoid arthritis
Excessive production of immunoglobulins (antibodies) (IgG, IgM, and IgA) and inflammatory cytokines (TnF alpha)
Stage 3 rheumatoid arthritis
Excessive Ig causes abnormal growth and division of synovial cells
Stage 4 rheumatoid arthritis
Leukocytes migrate to joints release enzymes that cause synovitis
Stage 5 rheumatoid arthritis
Rheumatoid factor try’s to reduce Ig levels however some don’t have RF
Stage 6 rheumatoid arthritis
Inflammation accompanies thickening of the synovial membrane or joint lining