skin functions
protection, body temp regulation, psychosocial, sensation, vitamin D, immunologic, absorption, elimination
cross section for normal skin
epidermis, dermis, subcutaneous tissue
factors affecting skin
unbroken and healthy skin and mucous membrane defend against harmful agents, resistance to injury affeted by Age tissue and illness, adequately nourished body cells r good, need good circulation too
children under 2 yrs
weak and thin skin when compare to adults
infants
skin and mucous membranes easily injure and subject to infection, Childs skin becomes increasingly resistant to injury and infection.
older ppl
maturation of epidermal cells is prolonged so skin is thin and easily damaged. also collagen and circulation is impaired so risk for damage is greater
skin alteration causes
thin and obese ppl are more susceptible to skin injury, fluid loss during illness causes dehydration, skin appears loose and flabby, jaundice can cause yellowish and itch skin, excessive sweating can make skin breakdown during illness, lesions can occur
wound types
intentional or unintentional
open or closed
acute or chronic
partial or full or complex thickness
principles of wound healing #1
intact skin is first line of defense against microorganisms, careful hand hygiene when wound care takes place, body response systemically to any trauma, need good blood supply for normal body respons to injury, normal healing is promoted when wound is free of foreign material
wound healing principles #2
extent of damage an persons state of health affect wound healing, response to wound is kore effective if u have proper nutrition
wound healing phases
hemostasis, inflammatory, proliferation, maturation
do wounds fully heal
no like scar tissue occur
hemostasis
occurs right after initial injury, involved blood vessels constrict and clotting begins, exudate forms so swell n pain occurs, increased perfusion results in heat and redness, platelets stimulate other cells to migrate to injury to make healing happn
inflammatory phase
follows hemostasis, lasts 2-3 days
WBC mostly leukocytes and macrophages move to wound
macro stay for a while
ingest debris and release GF to attract fibroblasts to wound
pt has generalized body respons e
proliferation phase
lasts for several weeks, new tissue is built to fill wound space thru fibroblast actions, capillaries grow across wound, thin epithelial cells from across wound, granulation tissue forms foundation for scar tissue
maturation phase
final stages, about 3 weeks after injury can continue months or years, collagen is remodeled, new collagen tissue deposited, scar is flat thin and whit
local factors affecting wound healing
pressure, desiccation or maceration (dehydrate or overhydrate), trauma, edema, infection, excessive bleeding, necrosis, biofilm
edema is bad when wound healing b/c
no vasculature there, can’t heal properly
biofilm
group of microorganisms has to be remove d
systemic factors affecting wound healing
age - children and healthy adults heal faster
circulation and oxygenation - need good blood flow
nutritional status
wound etiology - condition of wound affects healing
health status - corticosteroids and postoperative radiation therapy delay healing
immunosuppression
med use
adherence to treatment plan
what kind of meds can hinder healing
steroids
diet for wound healing
vitamin C for collagen, not too much salt, need protein to build back up, vitamin K for clotting, zinc
wound complications
infection, hemorrhage, dehiscent and evisceration, fistula forms
wound dehiscence
muscle is still intact but open tissue