Decontamination Summary

Question 1

What type of water can be used for manual cleaning ?

Answer 1

Tap water.

Question 2

What type of water can be used in ultrasonic bath ?

Answer 2

Tap water.

Question 3

What type of water can be used in cleaning stages of AWD ?

Answer 3

Tap water.

Question 4

What type of water should be used for thermal disinfection during AWD cycle ?

Answer 4

Water with conductivity lower than <30ms recommended.

Question 5

What type of water should be used for sterilisation ?

Answer 5

Purified water.

Question 6

What temperature should water be for manual cleaning ?

Answer 6

<35 degrees.

Question 7

What water temperature should be used for ultrasonic bath cleaning ?

Answer 7

<35 degrees.

Question 8

What water temperature should be used for AWD cleaning stage ?

Answer 8

Depends on chemical manufacturers instructions - usually <65 degrees.

Question 9

What water temperature should be used for thermal disinfection stage of AWD ?

Answer 9

90-95 degrees.

Question 10

What water temperature should be used for sterilisation ?

Answer 10

134-137 degrees.

Question 11

What is the most common cycle time for ultrasonic bath ?

Answer 11

20 mins - depends on validated cycle time.

Question 12

What is the most common cycle time for AWD cleaning stage ?

Answer 12

55 mins - depends on validated cycle time.

Question 13

What is the minimum time for thermal disinfection ?

Answer 13

Hold time of 1 min.

Question 14

What is the minimum time for sterilisation ?

Answer 14

Hold time of 3 mins.

Question 15

What type of chemical should be used for manual washing ?

Answer 15

pH neutral or enzymatic detergent.

Question 16

What type of chemical should be used for ultrasonic bath ?

Answer 16

pH neutral or enzymatic detergent.

Question 17

What type of chemical should be used for cleaning stage of AWD ?

Answer 17

Low alkaline or high alkaline detergent.

Question 18

Should chemicals be used during thermal disinfection ?

Answer 18

No.

Question 19

Should chemicals be used during sterilisation ?

Answer 19

No.

Question 20

What type of energy is used in manual cleaning ?

Answer 20

Scrubbing with brush or cloth.

Question 21

What type of energy is used in ultrasonic bath ?

Answer 21

Ultrasonic sound waves.

Question 22

What type of energy is used in cleaning stage of AWD ?

Answer 22

Water jet/spray.

Question 23

What type of energy is used in thermal disinfection ?

Answer 23

Water jet/spray.

Question 24

DWhat type of energy is used in sterilisation ?

Answer 24

Steam heat energy.

Question 25

What are the 3 requirements for transportation container of contaminated instruments ?

Answer 25

Rigid sided with tight fitting lid.
Leak proof.
Colour coded - waste streams.

Question 26

What instrument can be used for inspection of instruments ?

Answer 26

Light magnifier.

Question 27

What are the 4 elements to Sinner circle ? And what does it represent ?

Answer 27

4 elements required in successful cleaning process.
Temperature - between 20-30 degrees.
Energy.
Chemical.
Time - <20 mins.

Question 28

How is distilled water produced ?

Answer 28

Boiling and recondensing standard tap water.

Question 29

How is de-ionised water produced ?

Answer 29

Passing water through ion exchange, picks up sodium, calcium, potassium etc.

Question 30

What is reverse osmosis ?

Answer 30

Where semi-permeable membrane is used to filter water.

Question 31

What is the conductivity of tap water ?

Answer 31

56.8 microseimens.

Question 32

What is the conductivity of purified water ?

Answer 32

4.3 microsiemens.

Question 33

When is enzymatic detergent used ? Explain its action.

Answer 33

Breaks down proteins into smaller particles.
Used in ultrasonic and manual washing.

Question 34

When is pH neutral detergents used ? Why ?

Answer 34

Used for manual washing and in AWD if processing handpieces.
Less damage to handpieces and less harmful to operator skin.