Costley Module 3 Flashcards
3 objectives for infection control
Reduce pathogens to tolerable levels
Eliminate cross contamination
Standard precautions
3 methods of pre cleaning instruments?
Washer/thermal disinfector
Ultrasonic processor
Manual scrubbing
Advantages of ultrasonic bath for pre cleaning of instruments
Increased efficiency Improved effectiveness Reduced danger to clinician Bette Penetration into instrument areas Eliminates scrubbing which produces aerosols
Ultrasonic:
Guard against —- instruments must be —- —–
Overloading
Completely immersed
Non stainless steel instruments require you to do what before sterilizing
Pre dip in rust inhibitor
Color change indicators indicate what?
Sterilizer reached a specific temp NOT that they are sterile
What are the approved methods of sterilization
Steam under pressure
Dry heat
Chemical vapor
Steam under pressure includes what two methods
Gravity displacement
Prevacuum
Gravity displacement takes how long and what temperatures
15-30min
250F
121C
Pre vacuum sterilization takes how long and at what temperatures
3.5-10min
270F
132C
Dry heat ovens take how long and at what temperatures
120min
320F
160C
Chemical vapor takes how long and at what temperatures
20min
270F
132C
What are the 3 tests for sterilization
Internal indicator
External indicator
Biological indicator
What are the 2 types of dry heat sterilization
Static and forced air
What is the ingredient used in chemical vapor sterilization
Formaldehyde
The external indicator strip says what?
Temperature was reached
The internal indicator says what
Instruments were exposed to temp and steam for required time
The biological indicator says what
The autoclave is functioning properly
Biological testing is done how often
1xweek
Moist heat sterilizing —- but has the — temp
Dry heat takes the —- time
corrodes
lowest
Longest
Steam autoclaves use —- bacteria test strips vials ampules
Geobscillus stearothermophilus
Dry heat uses —- bacteria
Bacillus ateophaeus
Chemical vapor uses — bacteria
Geobscillus stearothermophilus
Moist heat cause distraction of Microorganisms by?
Coagulation of essential proteins
Moist heat can’t be used on what type of materials
Oils
Waxes
Powders
The most economical method of sterilization is?
Steam autoclave
One disadvantage of steam under pressure is?
Corrosion of carbon steel instruments
The action of dry heat is?
Oxidation
High level chemical disinfectants inactivate —– and — Microorganisms
Spores
All forms
High level chemical disinfectants can be used as sterilants if?
Left in for a long time
Intermediate level chemical disinfectants inactivate — but not —
All Microorganisms
Spores
Low level chemical disinfectants inactivate —- but not?
Vegetative bacteria and lipid viruses
Spores TB and non lipid viruses
Definition of Critical items
Do you sterilize or disinfect
Examples
Items that penetrate soft tissue/bone
Sterilize or dispose
Needles,probes,explorers,ultrasonic tip, curets
Definition of Semi-critical items
Sterilize or disinfect
Examples
Touch intact mucous membranes and oral fluids
Sterilize or high level disinfection
Bite blocks, mirrors, ultrasonic handpiece
Definition of Non-critical items
Sterilize or disinfect
Examples
Only contacts unbroken epithelium
Clean and use intermediate level disinfectant
Light handles, eyewear, bite sticks
Definition of Environmental items
Sterilize or disinfect
Examples
No contact with pt surfaces
Clean and intermediate to low level disinfection
Countertops etc
Flush water lines at beginning of the day for how long? And how long between pts?
2min
30sec
What should you do before giving a shot?
Apply antiseptic to reduce bacteria
You should do what before scaling into pockets
Apply/swab with antiseptic solution
