Intro to Wound Healing

Question 1

layers of the skin in order

Answer 1

epidermis
derman-epidermal junction (aka basement membrane)
dermis
subcutaneous (aka hypodermis)
adipose tissue
muscle
bone

Question 2

5 layers of epidermis

Answer 2

stratum corneum
stratum lucidium
stratum granulosum
stratum spinosum
straum basale

Question 3

non blanchable skin

Answer 3

bleeding under the skin

Question 4

types of cells in the epidermis

Answer 4

keratinocytes (squamous cells)
melanocytes
langerhans cells (immune respnse)

avascular

Question 5

types of cells in the dermis

Answer 5

vascular and nerve supply

fibroblasts
collagen
elastin

Question 6

function of epidermis

Answer 6

protection
vitamin D synthesis
thermoregulation
sensation
pigmentation

Question 7

dermal appendages

Answer 7

hair follicles
sebaceous glands
sweat glands

lined with epithelial cells (epithelial islands)

Question 8

skin function

Answer 8

provides thermoregulation
sensation
metabolism
organ of communication and identification
- injury can result in functional, physiological, body image change
capable of expression

Question 9

skin Loss *****

Answer 9

woulds are classified by depth of tissue injury except for pressure injury

Question 10

erosion **

Answer 10

loss of superficial epidermis, probably not bleed, redness, repair by local inflammatory response

ex: superficial burns/first degree
stage 1 pressure injury, abrasians

Question 11

partial thickness skin loss ***

Answer 11

loss of epidermis and part of the dermis, bleed, reepithelization for repair

ex: stage 2 pressure injury, superficial and deep thickness burns/second degree, skin tears and deep abrasians

Question 12

full thickness skin loss ***

Answer 12

loss of epidermis, dermis extending into subcutaneous/hypodermis, secondary intention repair through scar

ex: third degree burns, stage 3 and 4 pressure injury, surgical incisions, traumatic wounds

Question 13

skin changes with agins

Answer 13

decreased

epidermal/dermal thickness
subcutaneous fat
collagen and elastin
sensation
sweat glands
circulation
mast cells
regneration
4x slower healing

Question 14

acute wound

Answer 14

unplanned/planned event
healing proceeds in an orderly and timely fashion
surgical
abrasian/laceration

Question 15

chronic wounds

Answer 15

exists 2 weeks or longer
does not proceed thru normal healing process

pressure ulcers
diabetic ulcers

Question 16

NORMAL healing phases of wounds 4

Answer 16

hemostasis - to stop bleeding
inflammatory phase
proliferative phase (collagen)
maturation phase (remodeling)

Question 17

granulation tissue

Answer 17

fibroblasts produce collagen, wound contraction

20-40% of wound will be reduced in a few weekse

Question 18

epithelialization

Answer 18

migration of epithelial cells from wound edegs to resurface the wound

Question 19

hypertrophic scarring

Answer 19

synthesis exceeds breakdown

contained within the site of injury, has a likelihood of lessening and improving over time

Question 20

keloid scarring

Answer 20

can spread beyond borders of initial injury

abnormal healing responses causing scarring. Both are firm and raised scars formed by excessive collagen during healing. Both scars are raised

Question 21

type of wound closure

Answer 21

primary intension
delayed primary
secondary intention

Question 22

primary intention wound closure

Answer 22

surgical closure

traumatic wounds after sufficient I+ D (< hrs after injury = golden rule

incisional wounds with little tissue damage

Question 23

seconday intention wound healing

Answer 23

spontaneous closure

partial thickness wounds heal by epithelialization/contraction

wounds with full thickness loss heal by epithelialization granulation and contractions

wounds with high bacterial count, debris, necoriss, or full thickness depth may be allowed to close spontaneously

wound bed filling with viable tissue

Question 24

tertiary - delayed primary healing

Answer 24

surgical closure after granulation tissue has developed, planned period where wound is left open