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Decontamination > BDS4 > Flashcards

BDS4 Flashcards

1
Q

List reasons why we clean and disinfect before sterilisation? (4)

A
  1. Legal requirements
  2. Functionality
    - biological matter can clog instruments
  3. Remove biological contamination
    - Minimise spread of infection + cross contamination
  4. Restorative materials can adhere too instruments making them difficult to clean
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2
Q

Key principles a contaminated instrument transport box must comply with? (5)

A
  • Durable
  • Leak proof
  • Rigid sided
  • Colour coded
  • Tight fitting lid
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3
Q

Daily testing for washer disinfector (7)

A
  • 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
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3
Q

Specific loading requirements for washer disinfector (5)

A
  • 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
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4
Q

How do we check instruments after washer disinfector?

A
  • 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
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5
Q

Who is responsible for the daily WD testing?

A

User or CP(D)

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6
Q

Temperature of water required for manual cleaning?

A

<35

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7
Q

What should be used to aid with manual cleaning?

A

Chemical (pH, neutral, enzymes)

Chemical depends on volume of water

Long handled soft bristled brush

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8
Q

What are the 2 methods of manual cleaning?

A

Immersion

Non-immersion
- Handpieces not immersed in aqueous solution

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9
Q

What are the steps following a manual wash? (4)

A

Manual wash
Ultrasonic bath (removes stubborn contamination)
Rinsed again
Washer disinfector

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10
Q

List some pre flight checks for US bath

A

Filled to required level
Chemical volume relating to manufacturers instruction
Degas cycle ran prior to any cycles
Make sure no handpieces

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11
Q

Name the 2 different types of sterilisers

A

Type B + Type N

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12
Q

Features of Type B steriliser

A

Vacuum steriliser
Can process wrapped, channeled + lumened instruments
No steam penetration tests

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13
Q

Features of Type N steriliser

A

Can only process rigid steel instruments
No wrapped, channeled + lumened instruments

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14
Q

List the daily/weekly checks on all equipments (4)

A
  • Check door seal for damage or contamination
  • Check load carrier for damage
  • Check chamber for debris
  • Fill + drain water daily
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15
Q

Type B steriliser required tests (4)

A
  • Bowie dick test daily
  • Air leakage test weekly
  • ADFT air detector function test weekly
  • Full ACT
16
Q

2 daily tests for sterilisers

A
  • Steam penetration test (Bowie dick?)
  • Full ACT
17
Q

Function of a steam penetration test

A

Measures reach of pressure + temperature for sterilisation

Need 100% colour change

18
Q

List the 5 stages of the washer disinfector cycle and their use (5)

A
  1. Flush - remove easy debris
  2. Wash - remove hard debris
  3. Rinse - Removes any detergents
  4. Disinfectant - 90 deg for 1min
  5. Dry - chamber filled with hot air to remove all remaining moisture for next load
19
Q

Who is responsible for the management of a WD?

A

User

20
Q

Name a decontam guidance and its purpose

A

SHTM guidance
Maintenance + testing regime for equipment

21
Q

Name a decontamination guidance for cleaning of dental instruments

A

SDCEP cleaning of dental instruments

22
Q

When should handpieces be cleaned?

A

After every patient

23
Q

When should a handpiece be lubricated?

A

After wash and before sterilisation

24
Q

5 causes of handpiece faults

A
  1. Incorrect lubrication
  2. Incorrect instrument usage
  3. Damaged or oversized bur fitted
  4. Incorrect compressor settings and lack of maintenance
  5. Inadequate cleaning including incorrect processing (sterilising at wrong temp and no US)

Decontamination (2 decks)

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