NUR 352 Exam 1 Flashcards
Define infection
invasion and multiplication of microorganisms in body tissue
Chain of infection
-infectious agent
-reservoir
-portal of exit
-mode of transmission
-portal of entry
-susceptible host
COI: infectious agent
-bacteria, virus, fungus, parasite, protozoa
-potential to cause disease depends on: # present, virulence, ability to enter and survive in host, susceptibility of host
COI: reservoir
-place where microorganisms survive and multiply
-common reservoirs = humans, animals, insects, food, water, inanimate surfaces
COI: portal of exit
-means by which infectious agent leaves the reservoir
-ex. nose, mouth, orifices
COI: mode of transmission
-airborne, contact (direct or indirect), droplets, vehicles
COI: portal of entry
any orifice or breakdown of skin
COI: susceptible host
-depends on host’s level of immunity and virulence (strength and # of microbes)
Risk factors for HAIs
-long hospital stays
-use of indwelling catheters
-failure to wash hands properly
-overuse of antibiotics
-invasive procedures
-age/immunocompromised
-nutritional status
-use of central line
-use of ventilator
Tier 1 vs. tier 2 precautions
tier 1: standard precautions
tier 2: contact precautions, droplet precautions, airborne precautions, protective precautions
4 major types of HAIs
-Central line-associated bloodstream infections
-Surgical site infections
-catheter-associated UTIs
-ventilator-associated pneumonia
Standard precautions
-used for all patients
-use alcohol-based products for no visible soil
-use soap and water for visible soil
-enable safety devices and sharps container
-disposable/disinfect patient care equipment
-proper handling of laundry
Contact precautions
-protection against direct or indirect contact with contagious infection
-equipment:
-standard precautions
-private room
-gloves
-gown
-disposable BP cuff, thermometer, stethoscope, goggles
–ex. C.diff, MRSA, RSV
Droplet precautions
-droplets > 5 microns
-transmissible 3-6 ft from patient
-contact precautions and surgical mask
-ex. streptococcal pneumonia, influenza, mumps, pertussis (whopping cough)
Airborne precautions
-infectious droplets < 5 microns
-private room with negative pressure airflow, N95 mask, face protection
-ex. measles, varicella, tuberculosis,, SARS (severe acute respiratory syndrome)
Protective precautions
-used to protect immunocompromised patients
-private room, positive airflow (filtered air in), surgical mask worn by patient outside of room
What are some nursing considerations and isolation precautions for Clostridium difficile (C. diff)?
Precautions: contact
Considerations: wash hands with soap and water
C. diff is a bacteria that causes diarrhea and colitis (inflammation of the colon)
What are some nursing considerations and isolation precautions for MRSA (methicillin-resistant staphylococcus aureus)?
Precautions: contact
Considerations: easy HAI; prevent with good hygiene
MRSA is a type of bacteria that is resistant to several antibiotics. Staph infection can become severe and cause sepsis if left untreated
What are some nursing considerations and isolation precautions for Measles?
Precautions: contact and airborne
Considerations: MMR vaccine, highly transmissible through cough/sneeze/rash
Measles is a childhood infection that is an acute viral respiratory illness, causes fever, cough, runny nose, and rash
What are some nursing considerations and isolation precautions for Influenza?
Precautions: droplet
Considerations: flu vaccine
What are some nursing considerations and isolation precautions for hepatitis C?
Precautions: contact
Considerations: no isolation needed; spreads via blood contact
Hep C is a liver infection
What are some nursing considerations and isolation precautions for tuberculosis?
Precautions: airborne
Considerations: no initial symptoms, then manifested by cough, weight loss, night sweats, and caseous necrosis
Tuberculosis is a bacterial infection of the lungs
What is caseous necrosis?
-type of cell death that causes tissues to become “cheese-like” in appearance
-most common cause is tb
What are some nursing considerations and isolation precautions for Meningococcal Meningitis?
Precautions: droplet
Considerations: headaches, light sensitivity, neck/shoulder pain
Meningitis is an infection/inflammation of the membranes that envelop the brain and spinal cord known as the meninges
What are some nursing considerations and isolation precautions for RSV (respiratory syncytial virus)?
Precautions: contact
Consideration: most common in children
RSV is a common respiratory virus that usually causes mild, cold-like symptoms, but can be severe
What are some nursing considerations and isolation precautions for Hepititis A?
Precautions: contact
Considerations: no isolation needed, self-resolving, spread through fecal-oral route
Hep A is a liver infection that causes inflammation of the liver
What are some nursing considerations and isolation precautions for Norovirus?
Precautions: contact
Considerations: can acquire via travel outside US
Norovirus is highly contagious vomiting and diarrhea (norovirus causes the stomach flu)
What are some nursing considerations and isolation precautions for pertussis?
Precautions: droplet
Considerations: “whoop sound”
Pertussis is a highly contagious respiratory tract infection
What are some nursing considerations and isolation precautions for Mumps (infectious parotitis)?
Precautions: droplet
Considerations: spread via cough and sneeze
Mumps is a viral infection that affects the salivary glands (makes the parotid glands below the ears swell)
What are some nursing considerations and isolation precautions for Varciella Zoster?
Precautions: airborne
Considerations: viral infection from varicella, treat outbreaks with acyclovir
Medical vs Surgical Asepsis
-Medical asepsis: “clean” technique, reduce and prevent spread of microorganisms
-Surgical asepsis: “sterile” technique, kill all microorganisms and their spores
Secondary prevention
early detection through screening and preventing it from getting worse
ex. Pap smear screens for cervical cancer
Styles of communication
-passive
-assertive
-aggressive
-passive agressive
passive communication
want to avoid conflict so individual says nothing or simply agrees
assertive communication
honest and clear communication that does not violate the rights of others
-uses “I” statements
aggressive communication
communication that is verbally and sometimes physically abusive
-uses “you” statements
passive agressive communication
communication that appears passive on the surface but is demonstrating anger in a subtle, indirect, or secretive way
What is the importance of feedback?
Feedback allows the sender and the receiver know that the message was properly understood.
ex. constructive criticism, nodding, smiling
What is ISBARR?
a standardized approach to hand off communications between nurses and other members of the healthcare team
ISBARR acronym and details
I: Introduction; identify self and title
S: Situation; identify situation you are calling/reporting about, patient, room number, briefly state the problem
B: Background; what are the circumstances leading up to this situation? patient history, vital signs, labs, meds
A: Assessment; what is the nurses assessment of the situation?
R: Recommendation; what should be done to correct the problem? Make a specific statement or request.
R: review/repeat to decrease risk of error
Types of immunity
innate, adaptive, passive
innate immunity
“natural” immunity
adaptive immunity
“active” immunity developed throughout our lives via exposure or vaccination (artificial active)
passive immunity
“borrowed” immunity from another source and lasts a short time
ex. breastmilk
nonspecific vs specific immunity
specific immunity: lymphocytes (B & T cells) and antibodies bind to specific infectious agents and call WBC to destroy them
nonspecific: (neutrophils and macrophages) phagocytes eat and destroy any microorganisms or foreign bodies