Automated Washer Disinfector (AWD)

Question 1

What are the advantages of the AWD over manual cleaning?

Answer 1

1. Reproducibility
2. Control of the process
3. More readily validated

Question 2

Legislations

Answer 2

• Medical Devices Directive
• Health & Safety at Work Act 1974
• Consumer Protection Act 1986
• COSHH 2002

Question 3

What detergents are used in the AWD?

Answer 3

• Alkaline (preferred but may damage handpieces)

- Neutral enzymatic

Question 4

At what temperatures does the AWD operate?

Answer 4

65-70C = 10mins
72-78C = 3 mins
80-85C = 1 min
90-95 = 12s

PER instrument!

Question 5

Describe a cycle of the AWD

Answer 5

1. Pre-washing (cold water)
2. Washing (hot water + detergent)
3. Rinsing (cold)
4. Disinfection (thermal with RO water)
5. Drying

Question 6

What tasks can be perform in the maintenance of the AWD?

Answer 6

• Clearing blockages from spray arm holes + filters (in drain)
• Check door seals for damage
• Ensure spray arms freely rotate
• Paper in printer
• Testing as necessary

Question 7

How is a DAILY test carried out for an AWD?

Answer 7

AKA Automatic Control Test

• Printout = check correct time, temp
• Sign and log in book

Question 8

How is a WEEKLY test carried out for an AWD?

Answer 8

AKA Cleaning Efficacy Test

• Daily test +
• Protein test strip
• -> Read results and log

Question 9

How is a QUARTERLY and ANNUAL testing carried out for an AWD?

Answer 9

• Test Person (Validation Engineer)

- AED

Question 10

Define validation

Answer 10

Documented procedure for OBTAINING, RECORDING and INTERPRETING the results needed to show that a process will consistently yield a product to comply with pre-determined specification

Question 11

What are the 3 inlets of water for the AWD?

Answer 11

1. Hot mains
2. Cold mains
3. RO water