quiz 1 Flashcards
active immunity
host produces antibodies in response to natural antigens (infectious microorganisms) or artificial antigens (vaccines)
- duration: long/many years, immunity must be reinforced with booster
passive immunity
host receives natural (from a nursing mother through placenta/colostrum) or artificial (injection of immune serum/antibodies) antibodies produced by another source
- short duration
asepsis
freedom from disease-causing microorganisms
2 types: medical asepsis
surgical asepsis
medical asepsis
includes all practices intended to confine a specific microorganism to a specific area, limiting the number, growth, and transmission of microorganisms
surgical asepsis
aka sterile technique, refers to practices that keep an area or object free of all microorganisms (practices destroy all microorganisms and spores)
- used for all procedures involving sterile areas of body
- objects used in sterile field must be sterile
- become unsterile when touched by unsterile objects
- unsterile when out of sight, below waist or table level
- fluids flow in the direction of gravity
- edges of sterile field are unsterile
- skin cannot be sterilized
- maintain conscientiousness, alertness & honesty
colonization
process by which strains of microorganisms become resident flora
- microorganisms may grow and multiply but do not cause disease
bacteremia
when a culture of the individual’s blood reveals microorganisms (bacteria in the blood)
- straight line in antecubital and central line placed jugularly/subclavianly
- aerobic & anaerobic (2 sets)
septicemia
when bacteremia results in systemic infection
standard precautions
used in any situations involving blood; all body fluids, excretions, and secretions except sweat; nonintact skin; and mucous membranes
- includes hand hygiene, use of PPE (gloves, gown, mask, eye protection & face shield), safe injection practices and handling of potentially contaminated equipment/surfaces, respiratory hygiene/cough etiquette
- hand hygiene: most important measure to reduce risk of transmitting organisms from one person to another
- gloves: when touching blood, body fluids, secretions, excretions, contaminated items, mucous membranes, non-intact skin & when performing invasive procedures
- gown: when soiling of clothes is likely, when assessing or changing wound dressing, when having direct patient contact w/ patient who is in contact precautions, when performing invasive procedures
- mask, eye protection & face shield: when splashing or spraying of blood, body fluids, secretions or excretions are likely
- used for care for ALL patients
airborne precautions
used for clients known or suspected to have serious illnesses transmitted by airborne droplet nuclei smaller than 5 microns (measles (rubeola), varicella, tuberculosis)
- patient enters through separate entrance
- place patient in airborne infection isolation room (AIIR) w/ negative air pressure
- wear a fit-tested N-95 or higher-level respiration
- patient to wear a facemask when exiting the room, avoid contact with others, practice respiratory hygiene & cough etiquette
contact precautions
used for clients known to have or suspected of having serious illnesses easily transmitted by direct client contact or by contact with items in the client’s environment (indirect or direct)
ex. GI, respiratory, skin, wound infections or colonizations with multidrug-resistant bacteria, specific enteric infections such as C. difficile and enterohemorrhagic E. coli O157:H7, Shigella, and hepatitis A, for diapered or incontinent clients; respiratory syncytial virus, parainfluenza virus, or enteroviral infections in infants and young children; and highly contagious skin, infections such as herpes simplex virus, impetigo, pediculosis, scabies and MRSA (methicillin-resistant S. aureus).
- MRSA, multiple drug resistant organisms, VRE (vancomycin-resistant enterococcus), ESBL (extended-spectrum beta-lactamase)
- proper hand hygiene before and after patient contact
- put on a gown
- put on gloves
- remove gloves, then gown, & proper hand hygiene before leaving the room
direct transmission
involves immediate and direct transfer of microorganisms from individual to individual through touching, biting, kissing, or sexual intercourse
- includes droplet transmission (within 3 ft of each other) -> sneezing, coughing, spitting, singing, talking can spray into conjunctiva or to mucous membranes of eye, nose, or mouth
- droplet precautions: airborne droplet nuclei > 5 microns
ex. diptheria, mycoplasma pneumonia, pertussis, mumps, rubella, strep pharyngitis
- place patient in room w/ closed door
- wear a face mask upon entering room
- patient to wear a face mask when exiting their room, avoid contact with others, practice respiratory hygiene & cough etiquette
indirect transmission
transmission that is vehicle borne or vector borne
- vehicle: substance that serves as an intermediate means to transport and introduce an infectious agent into a susceptible host ex. fomites (inanimate materials/objects), water, food, blood, serum, plasma.
- vector: animal or flying/crawling insect that serves as an intermediate means of transporting the infectious agent. transmission can occur by injecting salivary fluid during biting or by depositing feces or other materials on the skin through the bite wound or traumatized skin area
cultures
laboratory cultivations of microorganisms in a special growth medium
granulation tissue
young connective tissue with new capillaries formed in the wound healing process
- contains connective tissue elements of collagen, blood capillaries, lymphatics, and other tissue-bound substances
- fragile, gelatinous tissue that appears red/pink
healthcare-associated infection
infections that originate in any healthcare setting and of hospital-acquired conditions
ex. nosocomial infections, catheter-associated urinary tract infection, surgical site infection, ventilator-associated pneumonia, central line associated blood-stream infection
nosocomial infection
infections that originate in the hospital
- can develop during the client’s stay in a facility or manifest after discharge
- subgroup of healthcare-associated infections
inflammation
local and nonspecific defensive response of the tissues to an injurious or infectious agent (-itis)
- destroys/dilutes the injurious agent, prevents further spread of injury, promotes repair of damaged tissue
- blood vessels at site of injury constrict -> more blood flows to injured area (redness and heat)
- vascular permeability increases at site of dilation of vessels b/c cell death, chemical mediator release and histamine release
- fluid, proteins, and leukocytes leak into interstitial spaces and signs of inflammation appear
- characterized by pain, swelling, redness, heat, impaired function, -itis
- signs are objective, symptoms are subjective (what’s their pain tolerance?)
leukocytosis
in response to exit of leukocytes from the blood into interstitial spaces during inflammation, bone marrow produces large numbers of leukocytes (WBCs) and releases them into the bloodstream
- can rise from 4,500-11,000 to 20,000 or more during inflammation
AAA
abdominal aortic aneurysm
A&O
alert and oriented
AB
abortion
ABG
arterial blood gas
ac
before meals
AC
antecubital
ACE
angiotensin converting enzyme
ACS
acute coronary syndrome
ADA
American Diabetes Association
ADHD
attention deficit-hyperactivity disorder
ADL
activities of daily living
AED
automatic external defibrillator
ad lib
as desired
ADH
anti diuretic hormone