Chapter 13: Med Surg Flashcards Preview

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Flashcards in Chapter 13: Med Surg Deck (89)
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1

regeneration

replacement of lost cells and tissues with cells of the same type

2

repair

healing as a result of lost cells being replaced by connective tissue

3

epithelial regenerative ability

skin, blood vessels, mucous membrane; readily regenerate

4

connective tissue regenerative ability

bone active tissue regenerates, cartilage regeneration possible but slow, tendons and ligaments regeneration possible but slow, blood cells actively regenerate

5

muscle regenerative ability

smooth regeneration possible mostly in GI tract, cardiac muscle is replaced by connective tissue, skeletal muscle some regeneration in moderately damaged muscle, but mostly connective tissue replaces severely damaged

6

nerve regenerative ability

neuronal is nonmitotic aka irreversibly damaged, glial the cells regenerate and scar tissue replaces

7

what type of cells regenerate constantly?

labile cells (skin, lymphoid, bone marrow, and mucous membranes)

8

what type of cells only regenerate if damaged?

stable cells (liver, pancreas, kidney, bone cells)

9

what type of cells do not regenerate?

CNS and skeletal and cells muscle

10

primary intention

healing takes place where wound margins are neatly approximated (e.g. surgical incision or paper cut)

11

initial phase

lasts for 3-5 days, incision fills with blood to form clots and begin healing process, macrophages ingest and digest debris and fragments to begin capillary growth

12

granulation phase

5 days-4 weeks, fibroblasts migrate, secrete collagen, the wound is pink, vascular, and red granules are present, wound begins to resemble adjacent skin

13

maturation phase and scar contraction

7 days to several months, overlaps granulation phase, fibroblasts disappear as the wound becomes stronger, myofibroblasts help to cause contraction and close the wound, may be painful

14

secondary intention

wounds that occur from trauma, ulceration, and infection have large amounts of exudate and wide irregular wound margins, healing and granulation take place from the edges inward and from the bottom upward and there is more granulation tissue, so the scar is bigger

15

tertiary intention

delayed primary healing, wound may be left open and sutured closed after the infection is controlled, resulting in a larger and deeper scar

16

what classifies a wound as chronic?

does not heal within 3 months

17

red wound

superficial or deep, clean and pink, possible serosanguineous

18

examples of red wounds

skin tears, stage 2 pressure ulcers, partial thickness loss, second degree burns, wounds that heal by secondary intention

19

red wound dressings

transparent dressing, hydrocolloid, gauze, gentle atraumatic cleansing permeable to oxygen

20

yellow wound

prescence of slough or soft necrotic tissue, creamy ivory to yellow-green

21

examples of yellow wounds

wounds with nonviable necrotic tissue

22

yellow wound dressings

absorptive dressing, hydrocolloidal dressing, hydrogel, wound irrigations, moist gauze, wound cleansing to remove nonviable tissue and absorb excess drainage, left in place for up to 7 days

23

black wound

black, gray, or brown, eschar, risk of wound infection high

24

examples of black wounds

full thickness loss, third degree burns, stage 3 and 4 pressure ulcers, gangrenous ulcers

25

black wound dressings

topical debridement, hydrogel, absorptive dressing, debridement of eschar and nonviable tissue

26

lack of Vitamin C effects the wound by

delays collagen production for fiber and capillary development

27

lack of protein effects the wound by

decreases amino acids for tissue repair

28

lack of zinc effects the wound by

impairs epithelialization

29

inadequate blood supply effects the wound by

decreases supply of nutrients to the effected area, decreases removal of nonviable tissue, inhibits inflammatory response necessary in the initial stage

30

corticosteroid drugs effect the wound by

impair phagocytosis of WBCs, inhibit fibroblasts, depress granulation tissue, and inhibit wound contraction necessary for the last stage of healing