Skin Grafts & Biological Skin Substitutes - Class 4 Flashcards

1
Q

skin grafts

A

split-thickness

full-thickness

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2
Q

split thickness

A

all of epidermis and part of dermis of varying thickness

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3
Q

split thickness can tolerate

A

less ideal conditions

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4
Q

when are split thickness skin grafts used

A

more fxnal than cosmetic reasons

resurface large wounds

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5
Q

full thickness skin grafts

A

all of epidermis and entire thickness of dermis included

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6
Q

full thickness skin grafts limited to

A

small, clean, uncontaminated and well vascularized wounds

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7
Q

full thickness donor sites

A

closed primarily

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8
Q

how are skin grafts retrieved

A

humby knife

power-driven dermatome

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9
Q

dressing of graft site must provide

A

uniform pressure to immobilize graft

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10
Q

dressing of graft prevents

A

shearing

formation of seromas or hematomas under graft

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11
Q

types of dressings

A

bolster w/ xeroform/adaptic

compressive

NPWT

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12
Q

how long is a dressing left on

A

5 days

unless signs of complication

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13
Q

interventions for dressing

A

leg elevation and complete bed rest

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14
Q

dressing of donor site

A

FTSG

STSG

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15
Q

FTSG donor site

A

dressed as other wounds closed primarily

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16
Q

STSG donor site

A

dressings that promote rapid epithelialization

causes little pain

requires little care

inexpensive

low rate of infection

17
Q

STSG examples

A

occlusive dressings (duoderm)

semi-occlusive (tegaderm)

semiopen dressings (xeroform)

18
Q

graft failure

A

poor graft contact or adherence to wound bed

hematoma/seroma formation under graft

movement or shearing of graft on wound bed

poor recipient site from poor vascularity

wound infection

technical error (applying graft upside down)

19
Q

biological substitutes

A

intended for permanent replacement or as a temporary biological dressing

20
Q

biological skin subs decrease ____ and promote _____

A

bacterial count

promote a sterile wound

21
Q

biological skin subs slow

A

loss of water, protein and electrolytes

22
Q

biological skin subs reduce

A

pain and fever

23
Q

biological skin subs restore

A

fxn

24
Q

biological skin subs –> prevent desiccation

A

by facilitating early motion

provide coverage of vessels, tendons and nerves to prevent desiccation

25
Q

biological skin subs

A

allograft/homograft

xenograft/heterograft

epithelial cells

allograft dermis

bilayer collagen matrices

26
Q

allograft/homograft

A

cadaveric grafts

transplanted w/in the same species

27
Q

xenograft/heterograft

A

pig skin grafts

one species to another

28
Q

epithelial cells

A

grown in culture from biopsy sized cultures

29
Q

allograft dermis

A

not rejected b/c of immunologically inert

can be eventually incorporated

30
Q

bilayer collagen matrices are made of

A

bovine collagen

31
Q

bilayer collagen matrices act as

A

scaffold for influx of fibroblasts and blood vessels that eventually replace it

32
Q

bilayer collagen matrices simulates

A

epidermis to control fluid loss

33
Q

s/p plastic surgery bedrest

A

complete and strict bedrest x 5 days

34
Q

how long is dressing left in place –> s/p plastic surgery

A

left in place for 5 days

unless signs of flap failure or graft infection

35
Q

s/p plastic surgery should do

A

leg elevation

36
Q

POD #5 graft/flap assessment for take

A

graft take assessed y percentage of adherence

37
Q

ambulation –> s/p plastic surgery

A

dependent on surgeons orders

OOB –> chair only v. ambulation

weight bearing status

38
Q

WB status –> s/p plastic surgery

A

dependent on MD

surgical site

39
Q

s/p plastic surgery –> donor site

A

primary closure

open STSG donor site