Autoclaves and decon Flashcards
What is the correct sterilising temperature, time and pressure for an autoclave?
134 degrees for 3 minutes at 2.2 bar
How long should decontamination audit records be stored for?
2 years
Instruments sterilised in a type B autoclave are pouched…
Before autoclave (The vacuum sucks the air out the pouch)
To prevent the spread of infectious diseases in the dental environment, gamma radiation is used to sterilise….
1) extraction forceps
2) matrix band retainer
3) rubber dam clamp
4) suture pack
Suture pack
Gamma radiation is used to sterilise anything pre-packaged
What does the term disinfection mean?
A chemical process which removes pathogens but not all viruses and spores
They will be removed during sterilisation
Equipment such as an ultrasonic cleaner needs to be tested to ensure it is fully functional, these tests should be recorded. How often should this take place?
Weekly
what does ‘standard precautions’ imply?
That every patient can be potentially infectious
What substance should the dental nurses use to clean up a spillage of vomit or any bodily fluids?
sodium hypochlorite (bleach)
What is used to clean forceps prior to sterilisation?
Detergent and warm water
A method by which a potential infection is spread is known as…
Transmission
The correction operating pressure for an autoclave is? (Lbs)
32 Lbs
Instruments that are not transported to the decontamination area immediately after use should be…
Placed in a dirty transport box and either immersed in water and enzyme soak or sprayed with disinfectant. (A sealable box)
Water temperature for pre-cleaning instruments before sterilising should always be..
Less than 45 degrees
Why should the water for decontaminating instruments be less than 45 degrees?
If the temperature is more than 45 degrees, blood can stick to the instruments
Instruments should be inspected under the magnifying light and checked for wear and debris when?
Before placing in the steraliser
How many stages does a washer disinfector have?
5
Which type of hand cleanser is used in the dental theatre?
Aseptic surgical hand wash
Which guidelines are implemented to prevent cross infection in the dental environment?
Standard procedures
Infection in the surgery may be reduced by wiping the work surfaces with what product?
Sodium hypochlorite
An effective measure in preventing the spread of infectious diseases is
1) using air con
2) wearing a face mask
3) wearing a sterile uniform
4) wearing gloves
4) wearing gloves
Which set of guidelines are implemented to prevent cross infection in the dental surgery?
1) correct precautions
2) standard precautions
3) strategic precautions
4) generic precautions
2)standard precautions
What should be used for cleaning work surfaces?
Alcohol free wipes
For how long should the dental unit water lines be flushed for between patients?
20-30 seconds
How long should the dental water lines be flushed for at the end of each session?
2-3 minutes
Which of the following is a non- vacuum autoclave?
1) B
2) N
3) T
4) D
2) N
To prevent the spread of infectious diseases in the dental environment, gamma radiation is used to sterilise which of the following?
1) cotton wool rolls
2) matrix band retainer
3) rubber dam clamp
4) bone rongeurs
1) cotton wool rolls
Gamma radiation is used to sterilise anything pre packaged
Which of the following is a vacuum autoclave?
1) N
2) B
3) T
4) D
2) B
HTM0105 is the guidelines for…
Decontamination in the primary care dental practices
What tests are done on the autoclave?
Health and safety checks e.g. door seal and filters, memory Bowie and dick test TST test Automatic control test Vacuum test
Define decontamination?
A chemical process which reduces the number of micro organisms but not necessarily viruses and spores
Define sterilisation
A process which kills all micro organisms including bacteria, viruses, fungi and spores
What is the holding time on an autoclave?
3 minutes
What does the N stand for in an N type autoclave?
Naked solid products
Which means unwrapped instruments only
What is a downward displacement autoclave?
A Non vacuum autoclave
What type is a vacuum autoclave?
B type
S type
What is cross infection?
The passing of pathogenic micro organisms from person to person directly and indirectly
What is the cycle for a washer disinfector?
Flush, wash, rinse, thermal disinfection, dry
Audit on decontamination procedures should be carried out how often?
6 monthly
How long can unwrapped instruments be stored for in a none clinical area?
One week
What colour does the TST strip change to when put through an autoclave?
Purple
Validation records for washer disinfectors should be kept for?
2 years
When preparing instruments for sterilisation, the correct cleaning actions just be followed to prevent cross infection. What is the correct sequence?
Debride
Inspect
Rinse
Scrub
What is most likely to result in a persistent failure of the ultrasonic bath to debride items out of the following options?
1) overload chamber
2) short vibration time
3) use of tap water
4) weak detergent solution
Overloaded chamber
What is the helix test used for?
To ensure steam penetration occurs
What is the term used to describe the technique of separating clean and contaminated areas in a clinical environment to avoid cross infection?
Zoning
What substance cannot be used to disinfect metallic surfaces?
Sodium hypochlorite solution
Within the decontamination room which would be the correct direction of airflow to best avoid cross contamination?
Autoclave to instrument wash sink
Various chemicals are used to clean the clinical environment and reduce the risk of cross infection. Which of the following options is a routine use of the chemical isopropyl alcohol?
1) disinfection of impressions
2) hand cleanser
3) wiping exposed X-ray films
4) clearing small blood spillages
Wiping exposed x Ray films
What will an autoclave not remove?
Debris
What is viricidal?
A cleaning agent which kills viruses
What is a downward displacement autoclave?
A vacuum autoclave what pushes the pressure downwards
