Tissue injury or necrosis caused by transfer of energy from a heat source to the body
Categories: - ✔✔thermal, radiation, electrical, chemical
Tissue destruction results from: - ✔✔Coagulation
Protein denaturation
Ionization of cellular contents
Critical systems affected include - ✔✔Respiratory
Integumentary
Cardiovascular
Renal
GI
Neurologic
Severity is determined by burn depth
First degree - ✔✔SUPERFICIAL partial thickness (sunburn)
Injury to the epidermis
Leaves skin pink or red, but NO blisters
Dry
Painful (relieved by cooling)
Slight edema
No scarring and skin grafts are not required
Second degree - ✔✔DEEP partial thickness destruction of epidermis and upper layers of dermis
Injury to deeper portions of the dermis
Painful (sensitive to touch and cold air)
, Appeared RED or WHITE, WEEPS FLUID, Blisters present
Hair follicles intact (i.e. hair does not pull out easily)
Very edematous
Blanching followed by capillary refill
Heals without surgical interventions, usually does not scar
Third degree - ✔✔Full thickness and deep full thickness; involves total destruction of dermis and
epidermis
Skin CANNOT regenerate
Requires skin grafting
Underlying tissue (fat, fascia, tendon, bone) may be involved
Wound appears dry and leathery as eschar develops
PAINLESS
Severity is determined by extent of surface area burned.
Rule of nines: - ✔✔Head and neck 9%
Upper extremities 9% each
Lower extremities 18% each
Front trunk 18%
Back trunk 18%
perineal area 1%
Head and neck - ✔✔9%
Upper extremities each - ✔✔9%
Lower extremities - ✔✔18% each
Front trunk - ✔✔18%
back trunk - ✔✔18%
Perineal area - ✔✔1%