Other Systems Flashcards
thermal burn
caused by conduction or convection.
EX) burns resulting from contact with a hot liquid, fire, or steam
electrical burn
caused by the passage of electrical current through the body. Typically there is an entrance and exit wound.
Complications include: cardiac arrhythmias, respiratory arrest, renal failure, neurological damage, and fractures.
EX) lightning strike
chemical burn
occurs when certain chemical compounds come in contact with the body. The reaction will continue until the chemical compound is diluted at the site of contact.
EX) sulfuric acid, lye, hydrochloric acid, gasoline
radiation burn
occurs most commonly with exposure to external beam radiation therapy. DNA is altered in exposed tissues and ischemic injury may be irreversible.
Complications include: severe blistering and desquamation, non-healing wounds, tissue fibrosis, permanent discoloration, and new malignancies
zone of coagulation
the area of the burn that received the most severe injury with irreversible cell damage
zone of stasis
the area of less severe injury that possesses reversible damage and surrounds the zone of coagulation
zone of hyperemia
the area surrounding the zone of stasis that presents with inflammation, but will fully recover without any intervention or permanent damage
superficial burn
involves only the outer epidermis. The involved area may be red with slight edema. Healing occurs without peeling or evidence of scarring in 2-5 days.
superficial partial-thickness burn
involves the epidermis and the upper portion of the dermis. The involved area may be extremely painful and exhibit blisters. Healing occurs with minimal to no scarring in 5-21 days.
deep partial-thickness burn
involves complete destruction of the epidermis and the majority of the dermis. The involved area may appear to be discolored with broken blisters and edema. Damage to nerve endings may result in only moderate levels of pain. Hypertrophic or keloid scarring may occur. In the absence of infection, healing will occur in 21-35 days.
full-thickness burn
involves complete destruction of the epidermis and dermis along with partial damage to the subcutaneous fat layer. The involved area typically presents with eschar formation and minimal pain. Pts with full-thickness burns require grafts and are susceptible to infection. Healing time varies significantly with smaller areas healing in a matter of weeks, with or without grafting, and larger areas requiring grafting and potentially months to heal.
subdermal burn
involves the complete destruction of the epidermis, dermis, and subcutaneous tissue. Subdermal burns may involve muscle and bone and as a result, often require multiple surgical interventions and extensive healing time.
serous exudate
presents with a clear, light color and a thin, watery consistency
considered to be normal in a healthy healing wound
observed during the inflammatory and proliferative phases of healing
sanguineous exudate
presents with a red color and a thin, watery consistency
the red appearance is due to the presence of blood which may become brown if allowed to dehydrate
may be indicative of new blood vessel growth or the disruption of blood vessels
serosanguineous exudate
presents with a light red or pink color and a thin, watery consistency
considered to be normal in a healthy healing wound
typically observed during the inflammatory and proliferative phases of healing
seropurulent
- presents as cloudy or opaque, with a yellow or tan color and thin, watery consistency
- may be an early warning sign of an impending infection a
- always considered an abnormal finding
purulent
- presents with a yellow or green and a thick, viscous consistency
- generally an indicator of wound infection
- always considered an abnormal finding
eschar tissue
described as hard or leathery, black/brown, dehydrated tissue that tends to be firmly adhered to the wound bed
gangrene tissue
refers to the death and decay of tissue resulting from an interruption in blood flow to an area of the body
some types of gangrene are also characterized by the presence of bacterial infection
most commonly affects the extremities, but can also occur in muscles and internal organs
hyperkeratosis tissue
also referred to as a callus
typically white/grey in color and can vary in texture from firm to soggy depending on the moisture level in surrounding tissue
slough tissue
described as moist, stringy or mucinous, white/yellow tissue that tends to be loosely attached in clumps to the wound bed
contusion
an injury, usually caused by a blow, that does not disrupt skin integrity. The injury is characterized by pain, edema, and discoloration which appears as a result of blood seepage under the surface of the skin
dehiscence
The separation, rupture, or splitting of a wound closed by primary intention. This disruption of previously approximated surfaces may be superficial or involve all layers of tissue.
dermis
The vascular layer of skin located below the epidermis containing hair follicles, sebaceous glands, sweat glands, lymphatic and blood vessels, and nerve endings.
desiccated
The drying out or dehydration of a wound. Desiccation often results from poor dressing selection that does not control the evaporation of wound bed moisture.
desquamation
the peeling or shedding of the outer layers of the epidermis. Desquamation normally occurs in small scales, although certain conditions, injuries, and medications may cause peeling in larger scales or sheets and extend to deeper layers of the skin.
ecchymosis
The discoloration occurring below intact skin resulting from trauma to underlying blood vessels and blood seeping into the tissues. The discoloration is typically blue-black, changing in time to a greenish brown or yellow color.An area where ecchymosis is present is commonly referred to as a bruise.
epidermis
The superficial, avascular epithelial layer of the skin that includes flat, scale-like squamous cells, round basal cells, and melanocytes which produce melanin and gives skin its color.
erythema
A diffuse redness of the skin often resulting from capillary dilation and congestion or inflammation.
friable
Tissue that readily tears, fragments, or bleeds when gently palpated or manipulated.
hematoma
A localized swelling or mass of clotted blood confined to a tissue, organ, or space usually caused by a break in a blood vessel.
hypergranulation
increased thickness of the granular layer of the epidermis that exceeds the surface height of the skin
hyperpigmentation
an excess of pigment in a tissue that causes it to appear darker than surrounding tissues
hypertrophic scar
an abnormal scar resulting from excessive collagen formation during healing. A hypertrophic scar is typically raised, red, and firm with disorganized collagen fibers.
keloid
An abnormal scar formation that is out of proportion to the scarring required for normal tissue repair and is comprised of irregularly distributed collagen bands. A keloid scar typically exceeds the boundaries of the original wound appearing red, thick, raised, and firm.
maceration
the skin softening and degeneration that results from prolonged exposure to water or other fluids.
normotrophic scar
A scar characterized by the organized formation of collagen fibers that align in a parallel fashion.
turgor
The relative speed with which the skin resume its normal appearance after being lightly pitched. Turgor is an indicator of skin elasticity and hydration and normally occurs more slowly in older adults.
ulcer
An open sore or lesion of the skin accompanied by sloughing or inflamed necrotic tissue.
allograft (homograft)
a temporary skin graft taken from another human, usually a cadaver, in order to cover a large burned area
autograft
a permanent skin graft taken from a donor site on the pts own body
donor site
a site where healthy skin is taken and used as a graft
escharotomy
a surgical procedure that opens or removes eschar from a burn site to reduce tension on a surrounding structure, relieve pressure from interstitial edema, and subsequently enhance circulation
full-thickness graft
a skin graft that contains the dermis and epidermis
heterograft (xenograft)
a temporary skin graft taken from another species
mesh graft
a skin graft that is altered to create a mesh-like pattern in order to cover a larger surface area
recipient site
a site that has been burned and requires a graft
sheet graft
a skin graft that is transferred directly from the unburned donor site to the prepared recipient site
split-thickness graft
a skin graft that contains only a superficial layer of the dermis in addition to the epidermis
z-plasty
a surgical procedure to eliminate a scar contracture. an incision in the shape of a “z” allows the contracture to change configuration and lengthen the scar
contaminated
presence of non-replicating bacteria on a wound that causes no additional tissue injury and does not stimulate an inflammatory immune response
colonization
presence of replicating bacteria on a wound surface that does not invade or further injure tissues and does not stimulate an inflammatory immune response.
Colonization can delay wound healing, however, colonized bacteria occasionally benefit wound healing by preventing more virulent organisms from proliferating in the wound bed.
infection
the presence of replicating bacteria that invades viable tissue beyond the wound surface causing a visible inflammatory immune response. Infection will significantly delay wound healing and, if untreated, can progress to sepsis, osteomyelitis, and gangrene
abrasion
wound caused by a combination of friction and shear forces, typically over a rough surface, resulting in the scraping away fo the skins superficial layers
avulsion
a soft tissue avulsion, sometimes referred to as degloving, is a serious wound resulting from tension that causes skin to become detached from underlying structures
incisional wound
most often associated with surgery and is created intentionally by means of a sharp object such as a scalpel or scissors
laceration
a wound or irregular tear of tissues often associated with trauma
can result from shear, tension, or high force compression with the resultant wound characteristics dependent on the mechanism of injury
penetrating
a penetrating wound can result from various mechanisms of injury and is described as a wound that enters the interior of an organ or cavity
puncture
made by a sharp pointed object as it pentetrates the skin and underlying tissues
typically, there is relatively little tissue damage beyond the wound tract, however, the risks of contamination and infection can be significant
skin tear
often results from trauma to fragile skin such as bumping into an object, adhesive removal, shear or friction forces
the severity of a skin tear can range from a flap-like tear, that may or may not remain viable, to full-thickness tissue loss
aerobic metabolism
the ATP producing metabolic processes that are dependent on oxygen transported via the circulatory system.
typically provide energy for low intensity and/or longer duration activities
anabolism
the metabolic process in which simple molecules (e.g., nucleic acids, polysaccharides, amino acids) are combine to create the complex molecules (e.g., proteins) needed for tissue and organ growth
anaerobic metabolism
metabolic functions that do not require the presence of oxygen and produce energy for high intensity, shorter duration activities
adenosine triphosphate (ATP)
the molecular unit within the body which transports the chemical compounds used for cellular metabolism
catabolism
the metabolic process in which complex materials (e.g., proteins, lipids) are broken down in the body for the purpose of creating and releasing heat and energy