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Lecture

BIOC33H3 Lecture Notes - Circulatory System, Unconsciousness, Hydrotherapy


Department
Biological Sciences
Course Code
BIOC33H3
Professor
Stephen Reid

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Chapter 25:Burns
Burns are body tissue injuries due to heat, cold, chemicals, electrical current, or
radiation.
Smoke and inhalation injuries result from inhalation of hot air or noxious chemicals.
The resulting effect of burns is influenced by the temperature of the burning agent, the
duration of contact time, and the tissue type injured.
Burn prevention programs focus on child-resistant lighters; nonflammable children’s
clothing; stricter building codes; smoke detectors/alarms; and fire sprinklers.
Nurses need to advocate for scald- and fire riskreduction strategies in the home.
Occupational health nurses need to educate workers to reduce scald, chemical, electrical,
and thermal injuries in the work setting.
Burn treatment is related to injury severity determined by depth. The extent is calculated
by the percent of the total body surface area (TBSA), location, and patient risk factors.
Burns are defined by degrees: first degree (same as sunburn), second degree, and third
degree. A more precise definition of second- and third-degree burns includes the depth of
skin destruction: partial-thickness and full-thickness.
Second- and third-degree burn extent can be determined using total body surface area
based on two guides: Lund-Browder chart and Rule of Nines. Burn extent is often revised
after edema subsides and demarcation of injury zones occurs.
Face, neck, and circumferential burns to the chest/back area may inhibit respiratory
function with mechanical obstruction secondary to edema or leathery, devitalized tissue
(eschar) formation. These injuries may cause inhalation injury and respiratory mucosal
damage.
Hands, feet, and eye burns may make self-care difficult and jeopardize future function.
Buttocks or genitalia burns are susceptible to infection. Circumferential burns to
extremities can cause circulatory compromise distal to the burn.
Burn management is organized chronologically into three phases: emergent
(resuscitative), acute (wound healing), and rehabilitation (restorative). Overlaps in care
exist from one phase to another.
EMERGENT PHASE
Period of time required to resolve immediate, life-threatening problems. Phase may last
from time of burn to 3 or more days, but it usually lasts 24 to 48 hours.
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