Adult MSK Flashcards
sudden onset, short duration
acute inflammation
edema, erythema, heat and pain
hallmarks of acute inflammation
persistent, prolonged duration
chronic inflammation
WBCs, proliferation blood vv, tissue destruction
hallmarks of chronic inflammation
prostaglandins, inc plateletaggregation
■
Mediate fever, pain
Cyclooxygenase pathway:
leukotrienes
Allergic, inflammatory response
(autoimmune)
Bronchoconstriction, leukocytes toinflammation
lipooxygenase pathway
4 phases of tissue healing
hemostasis and degeneration
inflammation
proliferation and migration
remodeling and maturation
timeline of homeostasis and degeneration
immediately to 24 hours
Coagulation
Growth factor stimulated
Bring inflammatory response
hemostasis
Hematoma
Inflammatory response
Tissue repair begins
degeneration
how does tissue repair begin?
fibroblasts create scaffolding, granulation tissue with new blood vv
how long does inflammation last
up to 5 days
Protective and curativehealthy tissue, scar
Remove the injurystart healing of tissue
inflammation
whats the end result of proliferation and migration?
a scar
Neovascularization/angiogenesis
Granulation tissue: endothelial cells, fibroblasts
–
Replaced with new matrix (fibrin, fibronectin)collagenscar
proliferation and migration
Scar tissue remodeled
Apoptosis
Can take years to remodel
Respond to appropriate stress
remodeling and maturation
3 responses to stress for tissues
tissue contracts, regeneration, repair
approximation, 3-4 mos
tissue contracts
restores normal tissue structure, function
tissue regeneration
cell regeneration, connective tissue scar formation
tissue repair
3 components of tissue healing
fibronectin
proteoglycans and elastin
collagen
5 MOI for the body
infection immune response genetic factors nutritional factors physical factors
forms scaffold for repair, “glue”
fibronectin
Secreted by fibroblasts
Bind to fibronectin and collagen
Hydrate tissue
proteoglycans and elastin
most important structural support and tensile strength for tissues
collagen
most common type of collagen
thick bundle, very strong
ex] scar, tendon, bone
type I
collagen type?
thin, growth plate
type II
collagen type?
thin, supple, elastic (skin/wound healing), children
type III
collagen repair process
type III –> type I
severe rapid breakdown of muscle
rhabdomyolosis
tendon or ligament MOI
rapid force with oblique direction OR degenerative changes
joint surfaces cartilage type
articular (hyaline)
tendon/ligament insertion
meniscus
disk
fibrocartilage
trachea
earlobe
elastic cartilage
meniscus
fibroelastic cartilage
type I collagen in what kind of alignment?
circumferential
dense outer layer (type I collagen), fibrocartilage (type II) inner layer
annulus fibrosis
viscoelastic, type II collagen, hi water content
nucleus pulposus
tough, dense outer layer, 80% of bone
cortical bone
spongy, thin plates, 20% of bone
cancellous/trabecular bone
Brings fibroblasts, platelets and osteoprogenitor cells
hemostasis of bone repair
Fibrin scaffold between ends of fracture
inflammatory process of bone repair
Callus forms and transforms via enchondral ossification■
■
Soft callus (Wk 2)
Hard callus
Error in this Phase*
“Bridging” on xray is evidence of healing
reparative phase of bone repair
bridging is what
on xray is evidence of healing
kids fx healing
4-6 weeks
adolescents fx healing
6-8 weeks
adults fx healing
10-18 weeks
who is at risk for stress fx
female athlete triad
type of fx common in vertebra
compression fx
decrease in muscle mass and function with decreased muscular regeneration
sarcopenia
effects of aging and MSK
3
sarcopenia, muscle stiffness and decreased flexibility
vascular granulation tissue leads to inflammation
pannus
Associated with: Increased chemical pain response Allodynia Referred pain Usually in muscles that overused
myofascial pain syndrome
Patho:
Shortened sarcomeres
Inflammatory responsehypoxia
Sympathetic response
myofascial pain syndrome
taut band of skeletal muscle
painful with compression, stretch, overload or contraction of the tissuereferred pain
myofascial pain syndrome
connective tissue is made up of
collagen
hypermobility
CT disorder
3 parts to have hypermobility for CT disorders
skin elasticity
joint hypermobility
cardiopulm- aorta
quick screen for CT disorders
Beighton scale