Chapter 27 Asepsis and Infection Control Flashcards
Infection
a disease state that results from the presence of pathogens nor on the body
Pathogens
disease producing microorganisms
Bacteria
the most significant and most commonly observed infection-causing agents in healthcare institutions
Categories of bacteria
spherical (cocci), rod shaped (bacilli), corkscrew shaped (spirochetes)
Gram positive or gram negative-based on reaction to gram stain
Aerobic or anaerobic-based on need for oxygen
Virus
smallest of all microorganisms
Fungi
plantlike organisms present in air, soil and water
Reservoir
natural habitat of organism
Portal of exit
point of escape for the organism
Means of transmission
Direct contact, indirect contact, airborne route
Portal of entry
point at which organisms enter a new host
Susceptible Host
must overcome resistance mounted by host defenses
Factors affecting an organisms potential to produce disease
Number of organisms, Virulence, Competence of persons immune system, Length of intimacy of contact between person and microorganism
Number of organisms
the more organisms the more likely to get sick
Virulence
ability to produce disease
Stages of Infection
Incubation period, prodromal stage, Acute, convalescent period
Incubation period
organisms growing and multiplying
Prodromal stage
person is most infectious, vague and nonspecific signs of disease
Acute
Full stage of illness- presence of specific signs and symptoms of disease
Convalescent period
recovery from the infection
Bodys defense against infection
Bodys normal flora, Imflammatory response- ( Vascular stage, cellular stage), Immune response
Vascular stage
cardinal signs of infection: redness, heat, swelling, pain, loss of functon
Asepsis
without infection
Sepsis
with infection
Aseptic Technique
Includes all activities to prevent or break the chain of infection
Includes two types: Medical asepsis and surgical asepsis
Medical asepsis
clean technique
Surgical asepsis
sterile technique
Used in operating room, labor and delivery areas
Ex: insertion of urinary catheter, sterile dressing changes, or preparing and injecting medicine
Bacterial Flora
Transient and resident
Transient
attached loosely on skin, removed with relative ease
Resident
found in creases in skin, requires friction with brush to remove
Nosocomial
originates or takes place in the hospital
Standard precautions
used in care of all hospitalized patients
Apply to blood, body fluids, secretions, excretions, contact skin, mucous membranes
apply to every patient
Tasmission-based precautions
used in addition to stand precautions for patients with suspected infection
include airborne, droplet or contact precautions
apply to patients with specific confirmed infecitons
wound
disruption in normal ski tissue integrity
types of wounds
intentional or unintentional
open or closed
acute or chronic
partial thickness, full thickness, complex
Aerobic
bacteria that requires oxygen to live and grow
Anaerobic
bacteria that can live without oxygen
Antibody
immunoglobin produced by the body in response to a specific antigen
Antigen
foreign material capable of inducing a specific immune response
antimicrobial
antibacterial agent that kills bacteria and suppresses their growth
disinfection
process used to destroy microorganisms; destroys all pathogenic organisms except spores
endemic
something that occurs with predictability in one specific region or population and can appear in a different geographical location
endogenous
infection in which the causative organism comes form microbial life the person himself or herself harbors
exogenous
infection in which the causative organism is acquired form outside the host
healthcare-associated infection (HAI)
an infection that was not present on admission to the hospital and develops during the course of treatment for other conditions
Host
animal or person on or within which microorganisms live
iatrogenic
infection that occurs as a result of a treatment or diagnostic procedure
isolation
protective procedure designed to prevent the transmission of specific microorganisms
personal protective equipment (PPE)
gloves, gowns, masks, and protective eye gear designed to minimize or prevent the healthcare workers exposure to infectious material
sterilization
the process by which all microorganisms, including spores, and destroyed
surgical procedure performed to render a person infertile
vector
nonhuman carries such as mosquitoes ticks and lice that transmit organisms from one host to another
bandage
piece of gauze or other material used to cover a wound
debridement
cleaning away devitalized tissue and foreign matter from a wound
dehiscence
separation of the layers of a surgical wound; may be partial, superficial, or a complete disruption of the surgical wound
dermis
layer of the skin below the epidermis
desiccation
dehydration; the process of being rendered free from moisture
dressing
protective covering placed over a wound
epidermis
superficial layer of the skin
eschar
a thick, leathery scab or dry crust that is necrotic and must be removed for adequate healing to occur
evisceration
protrusion of viscera through an incision
exudate
fluid that accumulates in a wound; may contain serum, cellular debris, bacteria, and white blood cells
fistula
an abnormal passage from an internal organ to the skin or from one internal organ to another
friction
occurs when two surfaces rub against each other; the resulting injury resembles an abrasion and can also damage superficial blood vessels directly under the skin
granulation tissue
new tissue that is pink/red in color composed of fibroblasts and small blood vessels that fill an open wound when it starts to heal
ischemia
deficiency of blood in a particular area
maceration
softening through liquid; over hydration
necrosis
death of cells and tissue
negative pressure wound therapy
activity that promotes wound healing and wound closure through the application of uniform negative pressure on the wound bed, reduction in bacteria in the wound, and removal of excess wound fluid
pressure ulcer
any lesion caused by unrelieved pressure that results in damage to underlying tissue
purulent drainage
comprised of white blood cells, liquefied dead tissue debris and both dead and live bacteria
sanguineous drainage
containing or mixed with blood
scar
connective tissue that fills a wound area
serosnguineous drainage
mixture of serum and red blood cells
serous drainage
composed of clear serous portion of the blood and from serous membranes
shearing force
force created when layers of tissue move on one another
subcutaneous tissue
underlying layer that anchors the skin layers to the underlying tissues of the body
wound
injury that results in a disruption in the normal continuity of body tissue