Burns Flashcards
factors associated with burn injury/death
Careless smoking, alcohol/drug intoxication
Older adults- ignition of clothing when cooking or smoking.
National Institute of Burn Medicine notes that 75% of burns are caused by our own action.
Toddlers/older adults from scalds.
Match play in school age child
Electrical injury in adolescent male.
Cigarette smoking in adults
Industrial settings- largest number of burn injuries are among electricians and chemical workers.
goals r/t human burns
Prevention- advocate for legislation for work place safety.
Life-saving measures for severely burned.
Prevention of disability and disfigurement.
Rehabilitation of patient through reconstructive surgery and rehabilitation programs.
patient’s with burn injuries
Statistics:
a. Incidence in US has decreased in last 20 yrs.
Now 4.2/10,000. 45,000 hospitalized/year.
b. 4,500 fire and burn deaths per year. Is
decreased by 60%.
c. Is 6th leading cause of accidental death.
d. Highest risk for older adult. Most common
burn is caused by scalds.
etiology of burn injury
Caused by: Dry heat flame Moist heat flame (scald) Contact with a hot surface Chemicals Electricity Ionizing radiation
dry heat (flame)
Caused by open flame as in house fire and explosion.
Ignited clothing accounts for most injuries.
Explosions result in flash burn injuries because there is a brief exposure to a high temperature.
moist heat (scalds)
Caused by contact with a hot liquid or hot steam.
Scald most common burn injury in toddlers and older adults.
Hot liquid spills usually burn upper frontal surfaces of the body.
Immersion scalds involve lower part of body.
dry and moist heat burns
Dry heat and moist heat burns are considered to be thermal burns.
Direct exposure to source of heat causes cellular destruction that can result in injury to vascular, boney, muscular and nervous tissue.
Priority treatment:
a. Extinguish flame- stop, drop & roll.
b. Steam / Hot Liquid- consult with fire department. Remove smoldering clothing and metal objects.
contact burns
Hot metal, tar, and grease can cause full-thickness burns when they contact the skin.
A body part touching an iron or space heater is an example of a hot metal injury. Also, in industry exposure to molten metals.
Tar and asphalt temperatures can be over 400 degrees so they can cause serious deep injuries within seconds when in contact with skin.
Hot grease injuries are associated with cooking and are usually deep.
chemical burn injury
Occur in the home, in industry, and as a result of deliberate assault.
Tissue injury occurs when chemicals come in direct contact with the skin. Epithelial tissue is ingested by the chemical.
Severity depends on the duration of contact, the concentration of the chemical, the amount of tissue exposed, and the action of the chemical.
chemical burn (continued)
Alkalis found in oven cleansers, fertilizers, drain cleaners and heavy industrial cleaners damage tissue by causing it to liquefy (liquefication necrosis) and proteins are denatured. Allows for deeper spread of chemical and more severe burns.
Acids found in bathroom cleansers, rust removers, chemicals for swimming pools and industrial drain cleaners damage tissue by coagulating cells and proteins ( coagulation necrosis). Tends to limit depth of damage.
chemical burns (continued)
Organic compounds found in many chemical disinfectants and in gasoline cause damage by fat solvent action. Also, once absorbed can produce toxic effects on the kidneys and liver.
Priority treatment:
a. Brush off any dry chemicals present on skin
clothing. Remove clothing.
b. Ascertain chemical causing burn and
consult Poison Control Center. Do not
attempt to neutralize chemical unless it is
positively identified and the appropriate neutralizing
agent is available.
electrical burn injury
An electrical injury happens when electrical current enters body. Called “Grand Masquerader” because small surface injury may be associated with severe internal injuries.
Divided into high and low voltage with high being over 1000 volts.
Tissue injury results from electrical energy being converted into heat energy.
Extent of injury depends on type of current, pathway of flow, local tissue resistance, and duration of contact.
Skin is most resistant organ. If skin resistance is overcome, the body acts as a conductor and current flows throughout the involved body part.
Bone has high resistance because of its density. Current flows along surface of the bone and the heat generated damages adjacent muscle. Deep muscle injury may be present even when superficial tissue seem ok.
electrical burns (continued)
The longer the electricity is in contact, the greater the damage. Duration is increased by tetanic contractions of flexor muscles preventing person from dropping source.
Generally there is entry and exit wounds. Entrance site usually well defined and round, whereas exit site is explosive and surrounded by charred tissue.
External burn injuries can occur when the current jumps or arcs between two surfaces. Injury is severe and deep.
True electrical injury occurs when there is direct contact with the electrical source. Internal damage results as electricity travelson the inside to the outside. Organs in the path of the current may become ischemic or necrotic. More than 90% of injuries to extremities result in gangrene development and amputation.
electrical burns continued
Alternating current as in homes, produces tetanic muscle contraction. This can inhibit respiratory effort and cause arrest.
Direct current as in a lightening bolt exposes the body to very high voltage for an instant. Usually there is entry and exit wounds.
Flash-over effect (unique to lightening) may save a person’s life since the current travels over the moist surface of the skin rather than internally.
priority treatment of electrical burn injury
Disconnect electrical source.
Smother any flames that are present.
Initiate CPR. Get ECG if possible.
Consult electrical specialist
thermal burns
dry heat flame & moist heat flame (scald)
radiation burns
Occurs with exposure to large doses of radioactive material.
Most common injury is from therapeutic radiation. Injury is usually minor and there is rarely extensive skin damage.
Injuries are more serious in industry when person is exposed to radioactive isotopes. The extent of the injury depends on the amount & type of energy deposited over time.
Severity is determined by type of radiation, distance from the source, absorbed dose, and depth of penetration into body.
radiation burn treatment
Shield skin appropriately for solar uv rays.
Limit exposure time to radioactive agents like Xrays.
If exposed to radioactive agent:
a. Remove patient from the source.
b. If exposed to radiation from an unsealed
source, remove clothing with tongs or lead
protected gloves.
c. If radioactive particles are on the skin, send to
nearest decontamination center for bathing or
showering.
old classification of burn death
First Degree- Damage limited to epidermis. Erythema appears and patient has pain.
Second Degree- Damage to epidermis and dermis. Blisters and mild to moderate edema develops. Patient has pain.
Third Degree- All dermal elements are effected. There will be white, brown, red, or black leathery tissue with thrombosed vessels, although no blisters appear. No pain.
Fourth Degree- Damage extends to subcutaneous tissue, to the muscle and bone.
superficial burn
Damage only to top layer of skin. See peeling of dead skin.
Color is pink to red with mild edema. There is pain.
No blisters. Healing time 3 to 5 days. No graft is needed.
Examples would be a sunburn or flash burn.
superficial partial thickness burn
Entire epidermis and variable portions of the dermis are destroyed.
Color is pink to red with mild to moderate edema. Blisters are present and there is pain. Nerve endings may be exposed.
Healing time is about 2 weeks.
Examples are scalds, flames, brief contact with hot surface.
deep partial thickness burn
Extends into deeper layers of the dermis. There are fewer healthy cells that remain. Blood vessels are patent. If blood supply degreases, ischemia can result and burn can convert to full thickness.
Color is red to dry white with moderate edema. Blisters are rare and some eschar may be present. There is pain. Healing time is 2 to 6 weeks and if prolonged may need graft. There may be scars.
Will blanche with pressure. Examples are scalds, flames, prolonged contact with hot surface, grease or chemicals.
full thickness burn
Reaches through entire dermis and sometimes into subcutaneous fat. There is no residual epidermal cells to repopulate. Cannot heal on it’s own. Will need grafting. No blisters.
Color black, waxy white, brown, yellow, or red with severe edema. Eschar and thrombosed vessels are present. Nerves may be totally destroyed so may not have pain. Tissue is leathery and does not blanche under pressure.
Healing time weeks to months. Need grafts.
Examples are scalds, flames and prolonged contact with hot objects, tar, grease, chemicals and electricity.
deep full thickness burn
Extends further than subcutaneous Tissue like to fascia and tissues. Color is black with edema and pain is absent. There are no blisters. Healing time is weeks to months.
Can be damage to muscles, bone and tendons.
Need early excision and grafting. Amputation may be needed if an extremity is involved.
burn zones
Burns have characteristic skin surface appearance that resembles a bull’s eye with most severe burn located in the center and lesser located along the periphery.
May be 1-2-3 concentric 3 dimensional zones corresponding to depth of burn.
minor burns
Deep partial thickness less than 15% TBSA.
Full thickness less than 2% TBSA.
No burns of eyes, ears, face, hands, feet or perineum.
No electrical or inhalation injuries. No other complicated injuries.
No patient over 60yrs and no chronic cardiopulmonary and endocrine disorders.
Patient receives care at ER. Burn Center not needed.
moderate burN
Deep partial thickness not more than 25%.
Full thickness not More than 10%.
No burns to eyes, ears, face, hands, feet, and perineum.
No electrical or inhalation injuries.
No chronic cardiopulmonary and endocrine disorder.
Patient under 60yrs.
Patient receives care at specialized center or Burn Center
major burns
Partial thickness greater than 25% TBSA.
Full thickness greater than 10% TBSA.
Any burn involving eyes, ears, face, hands, feet, and perineum.
Electrical and inhalation and complicated injuries. Patients 60 and older with chronic conditions.
Patients receive care at nearest ER and are transferred to Burn Center.
older adult considerations for burns
At risk for all degrees and severity for injury. Sensory awareness may be decreased with aging.
May have cognitive impairment and start a fire by leaving cooking unattended. May delay treatment so increases risk for infection.
Have thinner skin, decreased mobility and reaction time. Burn will be more extensive.
Immune response is decreased so healing time is slower and there is increased risk of infection and sepsis. May have pre-existing conditions.
cultural considerations for burns
For African Americans a sickle cell preparation may be appropriate if sickle cell status is unknown.
Trauma can trigger a sickle cell crisis in those with the disease or the trait
pathophysiology of burns
Tissue destruction results from coagulation & protein denaturation or from ionization of cellular contents when in contact with heat source.
Early tissue damage may occur at temp. of 104 degrees F. (40 degrees C.). Irreversible damage to dermis occurs at temp. of 158 degrees F.
Skin & mucosa of upper airways are most common sites of tissue destruction.
Deep tissues including viscera can be damaged by electrical burns or through prolonged contact with burning agent.
first effect of a burn
First effect a burn has is to produce a dilatation of the capillaries and small vessels in the area of the burn.
This increases capillary permeability.
There is a fluid shift from intravascular space to the interstitial area in burns over 20 to 30%. Period is known as third spacing or capillary leaking syndrome.
In burns over 30%, capillary leaking is not confined to burn area alone. There is edema throughout the body.
fluid leak of a burn
Generally, fluid leak occurs over first 24 to 48 hours post burn, peaking by 12 hours.
Patient will need fluid resuscitation during this period.
Plasma, proteins, and electrolytes are lost from vascular space but RBCs usually remain in vascular compartment which results in increased blood viscosity, hematocrit, and hemoglobin in early hours post burn.
fluid loss of a burn
Fluid loss results in decreased fluid volume in vascular system and there is a fall in blood pressure and cardiac output. Causes burn shock.
Response of sympathetic nervous system is an increase in peripheral resistance and an increased heart rate.
when capillaries regain integrity with burns
As capillaries begin to regain their integrity (48 to 72 hours post burn) fluid returns to vascular space and patient moves into Acute Stage of burn care.
Vascular compartment volume increases. Extra strain is placed on the heart and kidneys. If heart and renal system are adequate, urinary output is greatly increased.
Diuresis continues for several days to two weeks with a loss in body weight.
During this period patient is at risk for fluid overload and may require cardiotonic drugs and diuretics to support circulatory function and prevent CHF.
Monitor B/P, pulse, central venous pressure, pulmonary artery wedge pressure and hourly urinary output.
fluid electrolyte and blood needs of burns
In the Emergent Phase there is hyperkalemia, hyponatremia and metabolic acidosis.
Aldosterone is released causing reabsorption of sodium and water in the renal tubules.
Retained sodium accumulates in the interstitial tissue with fluid. Sodium pump fails (normally pumps NA out of cell and K into cells. Potassium is released into intravascular space.
Also have evaporative fluid loss through the burn wound. May reach 3 to 5 liters per 24 hours.