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Burns are a type of traumatic injury caused by thermal, electrical, chemical, or electromagnetic energy. Smoking and open flame are the leading causes of burn injury for older adults, while scalding is the leading cause of burn injury for children. Both infants and the elderly are at the greatest risk for burn injury.
A burn injury usually results from an energy transfer to the body. There are many types of burns caused by thermal, radiation, chemical, or electrical contact.
Thermal burns - burns due to external heat sources which raise the temperature of the skin and tissues and cause tissue cell death or charring. Hot metals, scalding liquids, steam, and flames, when coming into contact with the skin, can cause thermal burns.
Radiation burns - burns due to prolonged exposure to ultraviolet rays of the sun, or to other sources of radiation such as x-ray.
Chemical burns - burns due to strong acids, alkalies, detergents, or solvents coming into contact with the skin and/or eyes.
Electrical burns - burns from electrical current, either alternating current (AC) or direct current (DC).
The skin is the largest organ of the body and has many important functions. It is composed of the following layers, with each layer performing specific functions:
The epidermis is the thin, outer layer of the skin which consists of the following three parts:
Stratum corneum (horny layer)
This layer consists of cells containing the protein keratin. it keeps body fluid in while keeping external substances out. As the outermost layer, it continuously flakes off.
Keratinocytes (squamous cells)
This layer consists of living cells that are maturing and moving toward the surface to become the stratum corneum.
This layer is where new skin cells divide to replace the old cells that are shed at the surface.
The epidermis also contains melanocytes, which are cells that produce melanin (skin pigment).
The dermis is the middle layer of the skin. The dermis contains the following:
The dermis is held together by a protein called collagen, made by fibroblasts. This layer also contains nerve endings that conduct pain and touch signals.
The subcutis is the deepest layer of skin. The subcutis, consisting of a network of collagen and fat cells, helps conserve the body's heat and protects the body from injury by acting as a "shock absorber."
The skin is the body's largest organ, covering the body. In addition to serving as a protective shield against heat, light, injury, and infection, the skin also:
Regulates body temperature.
Stores water and fat.
Is a sensory organ.
Prevents water loss.
Prevents entry of bacteria.
Burns are classified as first-, second-, or third-degree, depending on how deep and severely they penetrate the skin's surface.
First-degree (superficial) burns
First-degree burns affect only the epidermis, or outer layer of skin. The burn site is red, painful, dry, and with no blisters. Mild sunburn is an example. Long-term tissue damage is rare and usually consists of an increase or decrease in the skin color.
Second-degree (partial thickness) burns
Second-degree burns involve the epidermis and part of the dermis layer of skin. The burn site appears red, blistered, and may be swollen and painful.
Third-degree (full thickness) burns
Third-degree burns destroy the epidermis and dermis. Third-degree burns may also damage the underlying bones, muscles, and tendons. When bones, muscles, or tendons are also burned, this may be referred to as a fourth-degree burn. The burn site appears white or charred. There is no sensation in the area since the nerve endings are destroyed.
Burns that are more severe and extensive require specialized treatment. Because the age of a burn victim and the percentage of the body's surface area that has been burned are the two most important factors affecting the prognosis of a burn injury, the American Burn Association recommends that burn patients who meet the following criteria should be treated at a specialized burn center:
Individuals with partial-thickness burns over 10 percent or more of the total body surface area (TBSA)
Any age with full-thickness burns
Burns of the face, hands, feet, or perineum (groin, or genital area), or burns that extend all the way around a portion of the body
Burns accompanied by an inhalation injury affecting the airway and/or the lungs
Burn patients with existing chronic conditions such as diabetes, high blood pressure, heart disease, kidney disease, or multiple sclerosis
Suspected child or elder abuse
A severe burn can be a seriously devastating injury -- not only physically but emotionally. It can affect not only the burn victim, but the entire family. Persons with severe burns may be left with a loss of certain physical abilities, disfigurement, loss of a limb, loss of mobility, scarring, and infection. In addition, severe burns are capable of penetrating deep skin layers, causing muscle or tissue damage that may affect every system of the body.
Burns can also cause emotional problems such as depression, nightmares, or flashbacks from the traumatizing event. The loss of a friend or family member and possessions in the fire may add grief to the emotional strain of a burn.
Because so many functions and systems of the body can be affected by severe burns, the need for rehabilitation becomes even more crucial.
Many hospitals have a specialized burn unit or center and some facilities are designated solely for the rehabilitation of burn patients. Burn patients need the highly specialized services of medical professionals who work together on a multidisciplinary team, including any/all of the following:
Infectious disease specialists
Rehabilitation nurses who specialize in burn care
Burn rehabilitation begins during the acute treatment phase and may last days to months to years, depending on the extent of the burn. Rehabilitation is designed to meet each patient's specific needs; therefore, each program is different. The goals of a burn rehabilitation program include helping the patient return to the highest level of function and independence possible, while improving the overall quality of life -- physically, emotionally, and socially.
In order to help reach these goals, burn rehabilitation programs may include the following:
Complex wound care
Physical therapy for positioning, splinting, and exercise
Occupational therapy for assistance with activities of daily living (ADLs)
Counseling to deal with common emotional responses during convalescence, such as depression, grieving, anxiety, guilt, and insomnia
Patient and family education and counseling
Advances in the understanding and treatment of burns, state-of-the-art burn units and facilities, comprehensive burn rehabilitation services, and integrated medical care have all contributed to the increase in the survival rate and recovery of burn patients.
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