Flashcards in Burns Deck (8)
Epidemiology of burns?
- mortality highest: over 65yo
- highest risk is 18-35 yo males
- kids: scalding injuries from hot drinks or bath
Cellular changes seen in burns?
- intracellular influx of Na/H2O
- extracellular migration of K+
- disruption of cell membrane fxn
- failure of Na+ pump
- burn shock w/ depression of myocardium and metabolic acidosis
Heme changes in burns?
- increase in hematocrit
- increase in blood viscosity
- anemia due to RBC destruction
Local progressive injury of burn?
- liberation of vasoactivae substances
- disruption of cellular fxn
- edema formation: leaky capillaries
When does cell damage occur? Diff zones?
- occurs at temps greater than 113F due to denaturation of protein
- zone of coag: irreversibly destroyed
- zone of stasis: stagnation of microcirc, can/will extend if not tx appropriately
- zone of hyperemia: increase blood flow
1st degree burn?
- erythema of skin
- possibly minimal surrounding edema
- minimal pain
2nd degree burn?
- deeper than 1st, involve partial thickness
- very deep sunburn, contact w/ hot liquids, flash burns from gas flames
- usually MUCH MORE painful than 3rd degree
- skin appears: red or mottled, blisters, broken epidermis, swelling, wet/weeping surfaces, painful, sensitive to air