Infection Control Flashcards
What is the sequence for donning PPE?
- Hand hygiene
- Gown
- Mask
- Eyewear
- Gloves
What is the wipe-discard-wipe method for?
Pre cleaning and disinfecting
How long are the water lines purged for at the beginning and end of the day?
Beginning: 2 minutes
End: 30 seconds
If the area underneath a barrier has not been compromised and a barrier falls off, what do we do?
We can simply rebarrier
How long should we wait before breaking down the unit when aerosols have been created?
15 minutes
Critical
penetrates soft tissue or bone
-must be sterilized
-ex// needles, curettes, explorers, probes
Semi-critical
touches intact mucous membrane and oral fluids
-sterilize or high level disinfection
-ex// biteblocks, mirror, ultrasonic hand piece
Noncritical
does not touch mucous membranes
-intermediate disinfection
-ex// light handles, eyewear
Environmental
no contact with patient surfaces
-low to intermediate disinfection
-ex// countertops, equipment surfaces
High level disinfectants
destroys all microorganisms but may not destroy high numbers of bacteria spores
Intermediate level disinfectants
destroys vegetative bacteria, viruses, and fungi. Registered by the EPA as tuberculocidal
Low level disinfectants
destroys vegetative bacteria, some fungi, viruses, and is not tuberculocidal.
List the information provided by the SDS sheet of a product
- Effectiveness and stability
- Directions regarding activation
- Storage
- Directions for use
- Disposal
- Warnings
- Toxicity
- Directions for emergency care
How is disinfection achieved? (What is the principal of action)
- coagulation, precipitation, and the oxidation of proteins in the microbial cells
- Denaturarion of the enzymes
List the properties of a disinfectant
- Broad spectrum
- Fast acting
- No affect by physical factors
- Nontoxic
- Surface comparability
- Residual effect on treated surfaces
- Easy to use
- Odorless
- Economical
What are the 3 types of hand hygiene?
Antiseptic hand wash: 20 sec w/ antimicrobial soap
Antiseptic hand rub: alcohol based 60-95% ethanol *non soiled hands
Surgical antisepsis: 2-6 minutes
What level of mask is mandatory in our clinic?
Level 3
What does BFE stand for?
Bacterial filtration efficiency
When do masks have to be changed?
- each hour
- each new patient
- when the mask becomes wet/soiled
We purge the water line to prevent which bacteria?
Psuedomonas aeruginosa
What are the requirements for the pre-procedural mouth rinse?
10mL of Listerine for 1 minute
List the types of sterilization
- steam under pressure (autoclave)
- dry heat
- chemical vapor
- immediate sterilization (flash)
- chemical (cold **not recommended)
Midmark 9 (autoclave)
250 degrees for 15-30 min (*plastic side up)
Statim (autoclave)
273 degrees for 4-10 min (**plastic side up)
What are the advantages and disadvantages of moist heat/steam under pressure sterilization (autoclaving)?
Advantages
-economical
-efficient
Disadvantages
-corrosion of non stainless steel
-dulling of instruments
Prevacuum (Class B sterilizer)
vacuum created to inject steam
279 degrees
3.5-10 minutes
20 minute drying cycle
Unsaturated chemical vapor sterilizer
chemical vapor instead of steam
20 minutes at 270 degrees
What are the advantages and disadvantages of chemical vapor sterilization?
Advantages
-time efficient
-decreased corrosion
Disadvantages
-special solutions required
-odor (needs adequate ventilation)
-can damage plastic
Dry heat sterilization
high heat
320 degrees for 120 minutes
good for dental hand pieces and some plastics
What are the advantages and disadvantages of dry heat sterilization?
Advantage
-no corrosion
Disadvantages
-prolonged exposure time
-high heat necessary
List the daily chemical indicator classes
Class 1 (external)
Class 2 (Bowie Dick test)
Class 3 (single internal)
List the multiparameter indicator (integrators) classes
Class 4 (test more than 2 parameters)
Class 5 or 6 (biological, three parameters and/or spore test
How do the weekly (biological) spore tests work?
-vial/ampule/strip with Geobacillus or Bacillus steam autoclaves
-dry heat: Bacillus strips
-chemical vapor: Geobacillus strips
two positives=pull machine out of use for repair
What is wicking?
When the bag that instruments have been sterilized in is damp, which allows bacteria to potential contaminant the instruments
