Past Exam Questions Flashcards
What PPE must be worn when carrying out manual washing of used instruments?
Face visor - protects from splashes and contamination into face and eyes
Gloves - Protects against infectious substances adhering to hands
Apron - Protects ourselves from splashes and contamination
Two methods used for manual cleaning of instruments and give example of instrument?
Washer disinfector - dental mirror
Ultrasonic cleaning - forceps
How often should ultrasonic cleaner be de-gassed?
- When first starting up and/or before every clean
What is removed by de-gassing?
- Air/oxygen removed from water
Why is de-gassing important?
- Ultrasonic cleaning may be less efficient
Why should dental handpieces not be placed in ultrasonic cleaner?
- Ultrasonic damage the high-speed turbine
- Steam cannot fully penetrate lumen of handpiece
- Type - S should be used instead
Why is it important to use de-mineralised water in steriliser?
- May be bacterial and fungal presence in tap water
What are the two types of manual washing?
- Immersion
- Non-immersion
What is the ideal instrument for manual washing?
- Stiff bristled, long handled brush
When using ultrasonic cleaner what should be done?
- Chamber filled with water and detergent and standard production cycle run with machine empty
- This effectively degasses it
- Naturally occuring air bubbles within water which prevents the efficiency of machine and impacts how cleaning effectiveness of machine
What is the definition of sterile?
- Probability of a viable microorganism being on the device less than 1X10^-6
Five things you can do to minimise healthcare asociated infections?
- PPE gloves, aprons, visors, face masks
- Aseptic technique
- Properly sterilised equipment
- Proper hand hygiene
- Operator competence
List the 10 SCIPs that should be followed in healthcare?
- Patient placement (assessment for infection risk)
- Hand hygiene
- Respiratory and cough etiquette
- PPE
- Safe management of care environment
- Safe management of care Linen
- Safe management of care equipment
- Safe management of blood and bodily fluids spillages
- Safe disposal of waste including sharps
- Occupational safety - prevention and exposure management inc sharps
List two agents that can be used for cleaning up blood psillages?
- Sodium hypochlorite
- Sodium dichloroisocyanurate
What strength of agent should you use and how long for for blood spillages?
- 10,000ppm chlorine solution for 3-5mins
How is the chain of infection broken when dealing wqiht dirty extraction forceps?
- Chain is broken at reservoir
- By cleaning, disinfecting and sterilising prior to use
List the steps you would take when cleaning a blood spillage?
- Wear PPE gloves apron vispr/goggles, face mask
- Contain with paper towel
- Assemble all equipment needed (spillage kit)
- Sprinkle chlorine releasing granules
- Clear affected area with paper towels and dispose of as clinical waste
- Wash area with water and detergent then dry
- Make sure any sharps are disposed of and dispose of single use items
- Perform hand hygiene
What are the 5 stages in correct order of the washer-disinfector cycle and describe the function/purpose of each stage?
- Flush/prewash - saturates contamination and removes gross contamination
- Main wash - supplemented with detergent to more effectively remove biologicals
- Rinse - Removes biological/chemical residue
- Thermal disinfection - Actively kills micro-organisms with heated water
- Drying - hot air to remove moisture SUMP from surface of instruments
What is the standard temperature banding for steam sterilisation?
- 134-137°
If chemical residue was being removed from the instrument what stage would the washer disinfector be at?
- Rinse
The temperature at the prewash stage of WD should be <35. The chemicals are added during the wash stage. Manufacturers instructions for use should be followed for doing. The drying stage removes any residual moisture after disinfection.
What is the first stage of vacuum capable Type-B steriliser?
- Air removal
What chemical would you use within an Ultrasonic bath?
- Enzymatic
A Bowie dick is carried out on a daily basis what is it testing for?
- Steam penetration
What is the standard disinfection temperature banding within our WD?
- 90-95°
What are the principles of waste disposal?
How to keep an amalgam container safe?
