Class 3 Flashcards
Etiology of inflammation
What caused it?
Duration of inflammation
how long is it?
Morphology of inflammation
What does it look like?
Acute inflammation
Sudden onset, short duration
Chronic inflammation
Longer duration (months/years)
Acute inflammation stops when?
Injurious stimulus removed
Acute inflammation initiated by
Local vessels near injury
Vessels initiate inflammation by
Alter permeability, allow leukocytes in
Inflammatory process stops by
Removal of stimuli
Mildest form of inflammation
Serous inflammation
Serous inflammation occurs?
Early stages and resolves easily
Inflammation rich in fibrin?
Fibrinous inflammation
Causes of Fibrinous inflammation
Bacterial infections
Inflammation caused by pus-forming bacteria
Purulent inflammation
Abscess
Local collection of pus
Inflammation of body surfaces or mucosa
Ulcerative inflammation
What ulcerative inflammation leads to
Ulceration or necrosis of epithelial lining
Ulcer is a ?
Defect in epithelium
Combination of ulcerative, fibrinous and purulent inflammation
Pseudomembranous inflammation
What is a pseudomembrane?
Exudate of fibrin, pus, cellular debris
Diphteria
Pseudomembrane on throat
Exudate containing monocytes, lymphocytes, macrophages, plasma cells is indication of?
Chronic inflammation
Why does chronic inflammation perpetuate
Stimulate proliferation of fibroblasts &
Constantly recruit new inflammatory cells
Chronic inflammation may lead to
Loss of function
Chronic inflammation type not preceded by acute
Granulomatous Inflammation
What accumulates at site of injury during Granulomatous inflammation
T-lymphocytes and macrophages
t-lymphocyte and macrophage function in Granulomatous inflammation
Lymphocytes release cytokines
Cytokines turn macrophage into epithelioid cells
Epithelioid functions during Granulomatous inflammation
Cells fuse together forming multinucleated giant cells
Granulomas consist of
Lymphocytes, macrophages, multinucleated giant cells
Leukocytosis
increase circulating WBC’s
Continually dividing or mitotic cells (Tissue healing)
Stem cells divide and differentiate, replace lost cells
Result of continually dividing cells (tissue healing)
Minimal tissue damage
Quiescent Cells (tissue healing)
Don’t divide regularly, divide if necessary
Outcome of quiescent cells (tissue healing)
Regeneration - replace w identical tissue
Non-dividing cells (tissue healing)
Not able to divide and regenerate
Eg. neuron
Outcome of non-dividing cells? (tissue healing)
Loss of functional capacity
by first intention healing
would clean, necrotic tissue/edges close together
by second intention healing
Large break, more inflammation, longer healing
Leukocytes (WBC’s) PMNS
Scavenge initial injury site
Connective tissue cells
Prod. scar tissue
Epithelial cells
Divide and extend across wound
Macrophages
Stay at healing site, produce cytokines/growth factors/meadiators
Myofibroblasts
Smooth muscle cells and fibroblasts
Angioblasts
blood vessel precursor
Fibroblast produces?
prod. extracellular matrix
Loss of function, deficient scar formation, excessive scar formation, infection are signs of?
Complications of healing
Keloids
scar tissue overgrowth - excessive collagen
Contracture
fixation/deformity of joint
Adhesions
scar tissue bands joining 2 normally separated surfaces