Burns Flashcards
First Degree Burns
Superficial injuries that involve outermost layer of skin (sunburn)
Second Degree Burns
Involve entire epidermis and varying portions of dermis, painful with blisters
Third Degree Burns
Total destruction of the epidermis, dermis and underlying tissue, lack of sensation
Fourth Degree Burns
Deep burn necrosis, extends into deep tissue, muscle or bone
Factors in Determining Burn Depth
how the injury occured, causative agent, temperature of agent, duration of contact with agent, thickness of the skin at the injury
Rule of nines
most common method for TBSA estimation, based on anatomic regions
Lund and browder
recognizes % of TBSA of various anatomic parts
Palmer
used to estimate extent of scattered burns, size of patient’s hand, including fingers is 1% TBSA
Patho of Burns
chemical injury, heat transfer from one site to another, thermal, electrical (skin and upper airway mucosa are most common), radiation
Major Burn Injury
Burns more than 30% may produce a local and
systemic response and are considered major burns
Systemic response includes release of cytokines and other mediators into systemic circulation
Fluid shifts and shock result in tissue hypoperfusion and organ hypofunction
Effects of MBI
Fluid and electrolyte shifts
Cardiovascular effects
Pulmonary injury
o Upper airway
o Lower airway
o Carbon monoxide poisoning
o Restrictive defects
Renal and GI alterations
Immunologic alterations
Effect on thermoregulation
Phases of burn injury
Emergent/ rescusitative, acute/ intermediate, rehab
Emergent
Onset of injury to completion of fluid
resuscitation
Acute/intermediate
From beginning of diuresis to wound closure
Rehab
From wound closure to return to optimal physical and psychosocial adjustment