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What is the 3 main phases of healing?
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1. Inflammation phase
2. Proliferation phase
3. Maturation phase
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What is inflammmation phase?
last?
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It's the first phase of healing.
prepares the wound for healing
Lasts 1-6 days from injury
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What is proliferation phase?
last?
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Second phase of healing.
rebuilds the damaged structures and strengthenes the wound
Lasts 3-20 days from injury
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What is the maturation phase?
how long does it last?
timeline applies?
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3rd phase of healing
modifies the scar tissues into its mature form, 9 on (1-2 years)
This timeline does not apply to every injury because more factors could affect the healing process ex) size, nutrition, medications, other infections etc.
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Major events in inflammation phse?
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1.vasoconstriction
2. vasodilation
3. clot formation
4. phagocytosis
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Major events in proliferation phase?
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1.epitheliaziation
2. fibroplasias/ collagen production
3. wound contracture
4. neovascularization
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Major events in maturation phase?
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1. Synthesis/ lysis balance,
2. Collagen fiber orientation,
3. Healed injury
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What is the Primary purpose of inflammation?
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It's an immediate protective response attempt to destroy dilute or isolate the cells or agents that may be at fault.
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Cardinal signs of inflammation (English and Latin)
and give the cause of each.
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Heat Calor Increase vascularity
swelling Tumor blockage of lymphatic drainage
pain Dolar physical pressure of chemical irritation of pain sensitive
redness Rubor increase vascularity
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English : loss of function
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Latin : factio laesa pian and swelling
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Explain the affects of vasoactive mediators
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Increase vascular permeablity, edema
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Chemotactic factors
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Recruitment/ stimulation of inflammatory cells, acute inflammation PMSs, platelets; chronic inflammation - macrophages, lymphocytes, plasmas cells
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Platelets and the coagulation system?
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Thrombus formation, vasoactive mediators (vascular permeability)
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What is Role of neutrophils?
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Predominate and release a number of factors that amplify the platelet aggregation response, initiate a coagulation cascade or act as chemoattractants for cells involved in the inflammatory phase.
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Macrophages
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Replace neutrophils after 2 days from injury
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