List reasons why we clean and disinfect before sterilisation? (4)
- Legal requirements
- Functionality
- biological matter can clog instruments - Remove biological contamination
- Minimise spread of infection + cross contamination - Restorative materials can adhere too instruments making them difficult to clean
Key principles a contaminated instrument transport box must comply with? (5)
- Durable
- Leak proof
- Rigid sided
- Colour coded
- Tight fitting lid
Daily testing for washer disinfector (7)
- Check spray arms rotate
- Jets are free from blockages
- Check filter for debris, contamination or instruments
- Check door seal for debris + damage
- Check chemical level, replenish if required
- Verify condition of load carrier
- Record disinfection temperature of first cycle
Specific loading requirements for washer disinfector (5)
- Follow specific loading patterns established at validation
- No overlapping or shadowing
- Do not overload the machine
- Utilise the available load carrier
- Forceps should be open at the hinge and positioned in a way they will remain open
How do we check instruments after washer disinfector?
- Under an illuminated magnifier
- Identify any gross contamination that may still bar present
- If contamination is still present the instruments can be manually cleaned and processed through the Ultrasonic
Who is responsible for the daily WD testing?
User or CP(D)
Temperature of water required for manual cleaning?
<35
What should be used to aid with manual cleaning?
Chemical (pH, neutral, enzymes)
Chemical depends on volume of water
Long handled soft bristled brush
What are the 2 methods of manual cleaning?
Immersion
Non-immersion
- Handpieces not immersed in aqueous solution
What are the steps following a manual wash? (4)
Manual wash
Ultrasonic bath (removes stubborn contamination)
Rinsed again
Washer disinfector
List some pre flight checks for US bath
Filled to required level
Chemical volume relating to manufacturers instruction
Degas cycle ran prior to any cycles
Make sure no handpieces
Name the 2 different types of sterilisers
Type B + Type N
Features of Type B steriliser
Vacuum steriliser
Can process wrapped, channeled + lumened instruments
No steam penetration tests
Features of Type N steriliser
Can only process rigid steel instruments
No wrapped, channeled + lumened instruments
List the daily/weekly checks on all equipments (4)
- Check door seal for damage or contamination
- Check load carrier for damage
- Check chamber for debris
- Fill + drain water daily
Type B steriliser required tests (4)
- Bowie dick test daily
- Air leakage test weekly
- ADFT air detector function test weekly
- Full ACT
2 daily tests for sterilisers
- Steam penetration test (Bowie dick?)
- Full ACT
Function of a steam penetration test
Measures reach of pressure + temperature for sterilisation
Need 100% colour change
List the 5 stages of the washer disinfector cycle and their use (5)
- Flush - remove easy debris
- Wash - remove hard debris
- Rinse - Removes any detergents
- Disinfectant - 90 deg for 1min
- Dry - chamber filled with hot air to remove all remaining moisture for next load
Who is responsible for the management of a WD?
User
Name a decontam guidance and its purpose
SHTM guidance
Maintenance + testing regime for equipment
Name a decontamination guidance for cleaning of dental instruments
SDCEP cleaning of dental instruments
When should handpieces be cleaned?
After every patient
When should a handpiece be lubricated?
After wash and before sterilisation
