Autoclaves and decon Flashcards

1
Q

What is the correct sterilising temperature, time and pressure for an autoclave?

A

134 degrees for 3 minutes at 2.2 bar

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2
Q

How long should decontamination audit records be stored for?

A

2 years

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3
Q

Instruments sterilised in a type B autoclave are pouched…

A
Before autoclave 
(The vacuum sucks the air out the pouch)
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4
Q

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

A

Suture pack

Gamma radiation is used to sterilise anything pre-packaged

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5
Q

What does the term disinfection mean?

A

A chemical process which removes pathogens but not all viruses and spores

They will be removed during sterilisation

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6
Q

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?

A

Weekly

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7
Q

what does ‘standard precautions’ imply?

A

That every patient can be potentially infectious

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8
Q

What substance should the dental nurses use to clean up a spillage of vomit or any bodily fluids?

A

sodium hypochlorite (bleach)

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9
Q

What is used to clean forceps prior to sterilisation?

A

Detergent and warm water

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10
Q

A method by which a potential infection is spread is known as…

A

Transmission

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11
Q

The correction operating pressure for an autoclave is? (Lbs)

A

32 Lbs

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12
Q

Instruments that are not transported to the decontamination area immediately after use should be…

A

Placed in a dirty transport box and either immersed in water and enzyme soak or sprayed with disinfectant. (A sealable box)

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13
Q

Water temperature for pre-cleaning instruments before sterilising should always be..

A

Less than 45 degrees

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14
Q

Why should the water for decontaminating instruments be less than 45 degrees?

A

If the temperature is more than 45 degrees, blood can stick to the instruments

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15
Q

Instruments should be inspected under the magnifying light and checked for wear and debris when?

A

Before placing in the steraliser

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16
Q

How many stages does a washer disinfector have?

A

5

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17
Q

Which type of hand cleanser is used in the dental theatre?

A

Aseptic surgical hand wash

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18
Q

Which guidelines are implemented to prevent cross infection in the dental environment?

A

Standard procedures

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19
Q

Infection in the surgery may be reduced by wiping the work surfaces with what product?

A

Sodium hypochlorite

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20
Q

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

A

4) wearing gloves

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21
Q

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

A

2)standard precautions

22
Q

What should be used for cleaning work surfaces?

A

Alcohol free wipes

23
Q

For how long should the dental unit water lines be flushed for between patients?

A

20-30 seconds

24
Q

How long should the dental water lines be flushed for at the end of each session?

A

2-3 minutes

25
Q

Which of the following is a non- vacuum autoclave?

1) B
2) N
3) T
4) D

A

2) N

26
Q

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

A

1) cotton wool rolls

Gamma radiation is used to sterilise anything pre packaged

27
Q

Which of the following is a vacuum autoclave?

1) N
2) B
3) T
4) D

A

2) B

28
Q

HTM0105 is the guidelines for…

A

Decontamination in the primary care dental practices

29
Q

What tests are done on the autoclave?

A
Health and safety checks e.g. door seal and filters, memory
Bowie and dick test
TST test 
Automatic control test 
Vacuum test
30
Q

Define decontamination?

A

A chemical process which reduces the number of micro organisms but not necessarily viruses and spores

31
Q

Define sterilisation

A

A process which kills all micro organisms including bacteria, viruses, fungi and spores

32
Q

What is the holding time on an autoclave?

A

3 minutes

33
Q

What does the N stand for in an N type autoclave?

A

Naked solid products

Which means unwrapped instruments only

34
Q

What is a downward displacement autoclave?

A

A Non vacuum autoclave

35
Q

What type is a vacuum autoclave?

A

B type

S type

36
Q

What is cross infection?

A

The passing of pathogenic micro organisms from person to person directly and indirectly

37
Q

What is the cycle for a washer disinfector?

A

Flush, wash, rinse, thermal disinfection, dry

38
Q

Audit on decontamination procedures should be carried out how often?

A

6 monthly

39
Q

How long can unwrapped instruments be stored for in a none clinical area?

A

One week

40
Q

What colour does the TST strip change to when put through an autoclave?

A

Purple

41
Q

Validation records for washer disinfectors should be kept for?

A

2 years

42
Q

When preparing instruments for sterilisation, the correct cleaning actions just be followed to prevent cross infection. What is the correct sequence?

A

Debride
Inspect
Rinse
Scrub

43
Q

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

A

Overloaded chamber

44
Q

What is the helix test used for?

A

To ensure steam penetration occurs

45
Q

What is the term used to describe the technique of separating clean and contaminated areas in a clinical environment to avoid cross infection?

A

Zoning

46
Q

What substance cannot be used to disinfect metallic surfaces?

A

Sodium hypochlorite solution

47
Q

Within the decontamination room which would be the correct direction of airflow to best avoid cross contamination?

A

Autoclave to instrument wash sink

48
Q

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

A

Wiping exposed x Ray films

49
Q

What will an autoclave not remove?

A

Debris

50
Q

What is viricidal?

A

A cleaning agent which kills viruses

51
Q

What is a downward displacement autoclave?

A

A vacuum autoclave what pushes the pressure downwards