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Chronic Inflamm
Lecture 4
58
Pathology
Graduate
12/13/2011

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Term
Phagocytosis
Definition
ingestion of microorganisms, foreign substances, necrotic cells, & connective tissue by specialized cells
Term
Chronic inflammation cell types
Definition
monocyte/macrophages, fibrocyte, endothelial cells, lymphocytes, plasma cells.
Term
mild injury
Definition
serous transudate
Term
severe injury
Definition
fibrinous exudate
Term
suppurative
Definition
pus, bacterial infection
Term
hemorrhagic
Definition
pink or red tinge (RBC's)
Term
Catarrhal
Definition
mucous, damaged tissue such as lung, nose, vagina.
Term
Lymphatics
Definition
if too much fluid, where does it go.
Term
Lymphangitis
Definition
inflammation of lymph vessels
Term
Lymphadenitis
Definition
lymph nodes become enlarged (hyperplasia of immune cells, TTP)
Term
Fever
Definition
caused by endogenous pyrogens(bacteria) released into circulation. Prostaglandins are released from macrophages and cause a shift to occur in neurons in relation to cold
Term
Leukocytosis
Definition
increased # of WBC's
Term
Leukocytosis - Neutrophilia
Definition
occurs during bacterial infections or an MI
Term
Leukocytosis: Lymphocytosis
Definition
occurs with viral infections
Term
Leukocytosis (Eosinophilia)
Definition
seen in allergies & parasitic infections
Term
Leukopenia
Definition
body is unable to make enough WBC's.
-seen in overwhelming infection, malnourishment, chronic debilitation. May lead to Cachexia
Term
Type I
Definition
found in skin, bone, tendon & ligament. Characteristic- builds tensile force when stretched.
Term
Type II
Definition
found in cartilage. Characteristic- surface resists shear forces, deep resists compression.
Term
Type III
Definition
found in pliable tissues such as skin, blood vessels, uterus GI tract.
Term
Type IV
Definition
found in all epithelial cells except the liver. Characteristic- tensile strength to underlying structure-- basement membrane.
Term
Type VII
Definition
found in anchoring filaments of lymph vessels to open them up, aids in drainage
Term
Red scar
Definition
collagen is vascularized
Term
white scar
Definition
type I collagen has decreased vascularization.
Term
Secondary intention of healing
Definition
Scar on top of granulation tissue.
Term
Liver
Definition
Stable cells, repair and regeneration, depends on amount of damage. Knock off a couple of cels, can still regenerate hepatocytes.
Term
Lung
Definition
Stable cells-able to regenerate but not constantly dividing
Term
Viral pneumonia
Definition
kills off type I pneumocytes, basement membrane regenerates to type II then diffentiates to Type I
Term
Asbestosis
Definition
repair with cell loss and destruction.
Term
Heart
Definition
damaged cells heal by repair only. Conn tissue scar makes cardiomyocytes hypo elastic and hypo kinetic. Once an MI then the tissue doesn't function as well. More prone to secondary complications.
Term
CNS neurons
Definition
Permanent cells, heal by repair but not a connective tissue scar, a glial scar. Sprouting from adjacent CNS cells is possible. Brain does not regenerate, certain cells in CNS can regenerate
Term
PNS
Definition
Permanent cells- replaced by scar tissue repair. No regeneration of PNS but axon regrowth @ rate of 1 mm/day or 1"/month. Lipid debris is removed by macrophages mobilized from the surrounding tissues by Wallerian degeneration
Term
Skeletal muscle
Definition
Stable cells- adjacent satellite cells can move into area and regenerate skeletal muscle BUT if cut/sliced--satellite cells don't know where to go so repair only
Term
Skeletal muscle hemostasis w hematoma
Definition
inflammation in the 1st phase (24-48 hours post injury)
Term
Skeletal muscle proliferation
Definition
phase follows w/ phagocytosis, activation of satellite cells & myofiber regeneration. (6-8 weeks post injury)
Term
skeletal muscle specifics, last phase
Definition
maturation involves tissue remodeling.
Term
Tendon/ligament
Definition
stable cells, in the process of repair--leads to regeneration because tissue is connective tissue. Takes greater than 1 year for return to full tensile strength
Term
Tendon-hemostasis
Definition
begins as platelets enter the tear & initiate clot formation. This happens immediately followed by inflammatory phase. (starts in 1st 72 hours after injury)
Term
Tendon- Fibrin & fibronectin
Definition
start cross linking to reduce bleeding.
Term
Tendon-proliferative phase
Definition
occurs 2-3 weeks post injury. Fibroblasts spouting collagen type III
Term
Tendon- maturation phase
Definition
begins around week 3 after initial injury. Type III is replaced by type I. Collagen is oriented along the lines of stress & organized to resist stretch and tearing.
Term
12-16 weeks to reach a level that tendon can be stressed.
Definition
maximum tension should be avoided for at least 8 weeks post tendon repair.
Term
Ligaments 1st
Definition
mild pain w/in 24 hours. Mild swelling, TTP & pain when stretched.
Term
Ligaments 2nd
Definition
moderate pain. Stress & palpation greatly increase pain. When torn=hypermobility
Term
ligaments 3rd
Definition
avulsion of tissue w/severe pain. Stress to tissue us usually painless, palpation reveals defect. Torn ligaments = instability of joint.
Term
Articular cartilage
Definition
avascular, aneural, alymphatic. After adolescence, repair only. If younger, then regeneration.
Term
Bone
Definition
stable cells. Cortical & cancellous. regeneration--fractures--easily regenerates. Is approximated by pinning, screws & plating. Immobilization period 4-8 weeks. WB 4-8 weeks
Term
FX healing 1.)
Definition
Inflammatory phase- hematoma formation
Term
Fx healing 2.)
Definition
reparative phase-formation of a soft callus around 2 weeks post injury. Growth factors involved in repair.
Term
Endochondral ossification
Definition
soft to hard callus leading to fracture stability (6-12 weeks) phase 2.
Term
Fx healing remodeling 3.)
Definition
union persists until bone is returned to normal (may take months to years)
Term
Hematoma
Definition
forms between fractured bone ends
Term
Necrosis
Definition
occurs at the bone ends because of torn blood vessels
Term
Follows necrosis after a bone fracture
Definition
inflammation
Term
Granulation tissue
Definition
blood vessels, phagocytic cells, fibroblasts-lay down new collagen, susceptible to fx again because has no bony material.
Term
soft callus
Definition
no bone, not able to withstand weight bearing.
Term
Chondroblasts
Definition
lay down cartilage, forms a fibrocartilagenous callus (collar). Still not weight bearing.
Term
Osteoblasts
Definition
form new bone * replaces the cartilage callus. Forms bony hard callus.
Term
Bony callus
Definition
remodeled by both osteoclasts and osteoblasts over following months. More compact bone is laid down and excess bone in callus is removed. Remodeling occurs according to bone stress.
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