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Disinfection & Decontamination

1. Why decontamination matters — GDC, CQC and HTM 01-05

2. The chain of infection and standard precautions

3. Hand hygiene, PPE and dirty-to-clean workflow

4. Cleaning: manual, ultrasonic and washer-disinfectors

5. Sterilisation, wrapping and storage

6. Environment, waterlines, sharps and records

Disinfection & Decontamination – Assessment

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Disinfection & Decontamination – Assessment

Disinfection & Decontamination
Disinfection & Decontamination – Assessment

Answer all questions. Pass mark: 80%.

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Question 1 of 12

1. Question

In England, which document is the key national guidance for decontamination in primary care dental practices?

HTM 01-05
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IR(ME)R 2017
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Resuscitation Council (UK) adult ALS
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NICE CG64 only
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Question 2 of 12

2. Question

Why must reusable instruments be cleaned before they are sterilised?

Cleaning is only for appearance in the cupboard
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Soil such as protein and blood can shield microbes from steam
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Autoclaves are damaged by clean metal
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HTM 01-05 bans sterilisation
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Question 3 of 12

3. Question

When should soap and water be used rather than alcohol hand gel?

Only at the end of the working day
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When hands are visibly soiled or after body-fluid contamination
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Never, if gloves are worn
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Only after using the autoclave
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Question 4 of 12

4. Question

What is the correct direction of workflow for reusable instruments?

Clean zone to dirty zone
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Dirty to clean, without crossing sterile packs
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Wherever there is free bench space
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Through the staff kitchen sink
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Question 5 of 12

5. Question

How should dirty instruments be moved from the surgery to a decontamination room?

Loose in gloved hands
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In an open tray on the reception desk
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In a rigid, leak-proof, lidded, labelled container
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In a sterile pouch from the last patient
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Question 6 of 12

6. Question

Which statement about single-use devices is correct?

They may be autoclaved once if they look intact
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They are used once and discarded; they must not be reprocessed
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They can be wiped and used on the same family
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Nurses may reprocess them; dentists may not
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Question 7 of 12

7. Question

A Type N autoclave is generally suitable for which load?

Wrapped pouches of hollow surgical instruments
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Unwrapped solid instruments for immediate use
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Any load if the chemical indicator changes colour
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Damp packed cassettes stored overnight
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Question 8 of 12

8. Question

What should you do with a wet, stained or burst sterilisation pouch after a cycle?

Dry it with a paper towel and store it
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Treat the contents as unsterile and reprocess after investigating the cause
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Use the instruments the same day only
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Place it at the back of the cupboard
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Question 9 of 12

9. Question

Why are washer-disinfectors generally preferred to manual sink cleaning?

They are quieter
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They provide a recorded, repeatable wash and thermal disinfection and reduce sharps/splash risk
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They replace the need for an autoclave
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They allow mixed dirty and sterile loads
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Question 10 of 12

10. Question

Dental unit waterlines need a defined flush and treatment protocol mainly because:

Patients prefer cold water
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Narrow tubing supports biofilm if water stagnates
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It is only a cosmetic issue
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CQC bans bottled water
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Question 11 of 12

11. Question

Immediately after a needlestick injury you should:

Suck the wound and finish the patient first
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Encourage bleeding, wash with soap and water, report at once and follow the occupational health pathway
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Apply household bleach to the wound
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Wait until the weekly practice meeting
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Question 12 of 12

12. Question

If a daily autoclave steam-penetration test fails, the correct action is to:

Keep using the machine and retest next month
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Take the autoclave out of use until the fault is corrected and documented
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Wrap loads twice to compensate
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Switch to a shorter cycle
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