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83 Cards in this Set

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What is the ultimate goal of Inflammation and repair?

Restore function and promoting regeneration of normal tissue structure

Treat inflammatory conditions. Three treatment types.

Physical agents (modalities)


Therapeutic exercise


Manual techniques

What are the three phases of Inflammation and healing?

Inflammation phase


Proliferation phase


Maturation phase

The phases of Inflammation and healing. What is the purpose of the Inflammation phase and when does it occur?

Prepares wound for healing


Days 1 to 6

Phases of Inflammation and healing. What is the purpose of the proliferation phase and how long does it last?

Rebuilds damaged structures and strengthens the wound


Days 3 to 20

Phases of Inflammation and healing. What is the purpose of the maturation phase and when does it occur?

Modifies the scar tissue into its mature form


Day 9 onward

Which phase of Inflammation begins when the normal physiology of tissue is altered by disease or trauma?

Phase I: Inflammation

Which phase of Inflammation is necessary for healing?

Phase I: Inflammation

Which phase of Inflammation can become inappropriate, such as in autoimmune diseases, causing damage and excessive scarring?

Phase I: Inflammation

What are the five Cardinal signs of Inflammation?

Heat


Redness


Swelling


Pain


Loss of function

How is bleeding stopped?

Hageman factor (clotting factor XII)

factor

What cell converts into macrophages in the tissue space during the cellular response?

Monocytes

Which leukocyte converts to macrophages and predominates for 24 to 48 hours after injury?

Monocyte

Which cell is most effective when oxygen is present and engulfs large debris?

Macrophage

Which cell activates cells to make antibodies during the immune response?

Macrophage

What are the four simultaneous processes that occur during the proliferation phase?

Epithelialization


Collagen production


Wound contraction


Neovascularization

What makes collagen?

Fibroblasts

What is the purpose of epithelialization? (2)

Re-establish epidermis


Provide protection

How do fibroblasts align themselves to the capillaries?

Perpendicular

Collagen production day 7. (2)

Significant increase in collagen


Tensile strength of injured area increases

Collagen production day 12.

Type 1 collagen replaces type 3

Collagen production day 21.

Maximal collagen production


20% wound strength

Collagen production six weeks.

80% of long term strength

Which phase is the longest phase of healing?

Maturation phase

What decreases during the maturation phase? (5)

Fibroblasts


Macrophages


Myofibroblasts


Capillaries


Water content

What is the goal of the maturation phase?

Restore prior function of tissue

Examples of type 1 collagen. (4)

Bone


Skin


Tendon


Mature scars

Example of type 2 collagen.

Cartilage

Examples of type 3 collagen. (3)

Gastrointestinal tract


Uterus


Blood vessels

Is type 1 or type 3 collagen stronger?

Type 1

Increased collagen production is due to inhibition of...

Lysis

Keloid and hypertrophic scarring is due to...

Inhibition of lysis increasing collagen production.

How long does collagen synthesis and lysis last after an injury?

12 to 24 months

What does it mean when the scar is more red than other tissue?

Remodeling is still occurring

What are the two theories regarding collagen orientation?

Induction theory


Tension theory

Can skeletal muscle cells proliferate?

No

What are the four stages of bone healing?

Inflammation


Soft callus


Hard callus


Bone remodeling

What is impaction?

Dissipation of energy from an insult

Induction is the least understood bone healing stage. What is it?

Cells with osteogenic properties activate

What four things happen during the inflammation stage of bone healing?

Fibrous union


Fracture hematoma


Oxygen tension decrease


pH decrease

What six things happen during the soft callus stage of bone healing?

Increased vascularity


Increased cell proliferation


Capillary growth


pH normalizes


Hematoma has fibrous tissue added


Osteoclasts remove bone fragments

What happens during the hard callus stage of bone healing?

Fracture healing

When does the remodeling stage of bone healing begin and end?

Begins when fracture is healed


Ends when bone returned to normal state

What two things happen during remodeling stage of bone healing?

Fibrous bone converts to lamellar bone


Medullary canal revised

When does the soft callus stage begin and end?

Begins when pain and swelling subside


Ends when bony fragments are united by fibrous tissue

When does the hard callus stage begin and end?

Begins when hard callus covers ends of fracture


Ends when new bone unites with fragments

When does the inflammation stage of bone healing begin and end?

Begins shortly after impact


Ends with fibrous union

Why does cartilage have a limited ability to heal? (3)

Lacks lymphatics, blood vessels, and nerves

What are some adjuncts to promote wound healing? (5)

Negative-pressure wound therapy


Hydrotherapy


Biological dressings containing silver


Silicon-based wound dressings


Immunonutrition

What four systemic factors affect wound healing?

Age


Disease


Medication


Nutrition

What are some local factors that affect wound healing? (5)

The injury itself


Infection


Vascular supply


External forces (modalities)


Movement

The simultaneous progression of active inflammation, tissue destruction, and healing.

Chronic inflammation

Active inflammation follows acute inflammation and can be the result of:

Cumulative trauma or other interference with normal healing

Tissue destruction related to chronic inflammation may be the result of:

Immune response or autoimmune disease

If acute inflammatory phase lasts longer than 4 weeks, this is known as:

Subacute inflammation

How long does chronic inflammation last?

Months to years

Increased fibroblast proliferation, which increases collagen production and ultimately increases scar tissue and adhesion formation is a result of:

Chronic inflammation

What do humoral and neural mediators do?

Control inflammatory phase

What two types of cells predominate immediately after injury?

Platelets and neutrophils

Vascular response of inflammation:


What happens during vasoconstriction?

Damaged blood vessels constrict to minimize blood loss. Mediated by norepinephrine. Lasts 5 to 10 minutes.

Vascular response of inflammation:


What happens during vasodilation?

Blood vessels near injury dilate and increase permeability causing edema. Mediated by histamine, bradykinin, prostaglandins, serotonin, hageman factor, and complement fractions. Leukocytes attracted to histamine via chemotaxis. Lasts up to an hour.

Vascular response of inflammation:


What happens when Hageman Factor touches negatively charged surface of endothelial lining of damaged vessels?

Activates coagulation system to stop bleeding. Vasoconstriction and increased vascular permeability. Produces kallikrein and plasmin. Plasmin activates more Hageman factor. Complement system activates.

Hemostatic response of inflammation:


What happens during this response?

Immediately after injury, platelets release fibrin to stimulate clotting to control blood loss

Cellular response of inflammation:


What happens during this response?

Monocytes convert to macrophages and predominate for 24 to 48 hours after injury

Immune response of inflammation:


What happens during this response?

Macrophages activate cells to make antibodies. Foreign antigens presented to T-cells. T-cells activate B-cells. Phagocytosis occurs.

What does plasmin do?

Augments vascular permeability and activates Hageman factor

What are kinins?

Peptides that are inflammatory substances derived from plasma and trigger the immune system

What are prostaglandins?

Produced by nearly all cells in body and released when cell membrane is damaged

What are thought to be responsible for sensitizing pain receptors and hyperalgesia?

Pro-inflammatory prostaglandins

What is transudate?

Fluid that first forms edema


Has electrolytes and water

What is exudate?

Cloudy fluid with high lipid and cellular debris content

Leukocyte migration from blood vessels into perivascular tissues is known as:

Emigration

Epithelialization of proliferation phase:


What happens during epithelialization?

Basal cells detach from basement membrane. Cells migrate toward the wound. Contact inhibition occurs. Basal cells proliferate.

What is healing by primary intention?

Wound can heal without wound contraction

What is healing by secondary intention?

Wound must undergo wound contraction to heal

What is healing by delayed primary intention?

Later suturing or skin grafting can reduce wound contraction

Neutrophils squeezing through vessel walls after margination is known as:

Diapedesis

Sequence of events in the journey of neutrophils in the wound transmigrating across the capillary endothelial cell walls is known as:

Extravasation

Collagen production of the proliferation phase:


What happens during collagen production?

Fibroblasts make collagen and align perpendicular to capillaries. Cross-linking strengthens injury. Granulation tissue is formed. Type 3 collagen converts to Type 1 collagen. Strength of wound reaches 80% strength.

Wound contraction of the proliferation phase:


What happens during wound contraction?

Contraction starts at day 5 and peaks day 14. Wound is pulled together by myofibroblasts.

Neovascularization of the proliferation phase:


What happens during neovascularization?

Angiogenisis results in development of new blood supply

The scar attempts to mimic the characteristics of the tissue it is healing is known as:

Induction theory

theory

Internal and external stresses placed on the injury during the maturation phase determine the final tissue structure is known as:

Tension theory

theory