Decontamination and Disinfection Flashcards Preview

BDS 2: Adult Restorative > Decontamination and Disinfection > Flashcards

Flashcards in Decontamination and Disinfection Deck (35)
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1

Define cleaning

Physical removal of microbes (including prions) but not necessarily killing them

2

Define disinfection

- Reduction of the number of viable microorganisms but may not inactivate some microbial agents, such as certain viruses and bacterial spores
- It should make the disinfected object safe to handle

3

Define sterilisation

Killing and removal of all microorganisms including bacterial spores

4

How should we decontaminate high risk equipment?

Sterilisation or single use item

5

How should we decontaminate medium risk equipment?

- Preferably sterilisation
OR
- High level disinfection

6

How should we decontaminate low risk equipment?

Disinfection

7

What does HTM01-05 state about single use instruments?

Single use items should never be reused

8

What does HTM01-05 state about the number of hand washing and decontamination sinks in decontamination units?

- 1 Hand washing sink
- 2 Instrument decontamination sinks

9

What does HTM01-05 state about wrapped instrument storage?

Wrapped instruments may be stored up to 1 year

10

List some modes of transmission for microbes (5)

- Direct contact
- Indirect contact
- Inhalation
- Ingestion
- Inoculation

11

What does HTM01-05 state about storage of unwrapped instruments? (2)

Compare storage in clinical vs non clinical areas

- Maximum storage in clinical area is 1 day
- Maximum storage in non-clinical area is 1 week

12

What does HTM01-05 require immunisation from?

- HBV
- Tetanus

13

Describe a single decontamination room (5)

- Dirty zone
- Clean zone
- Separate wash hand basin and storage for PPE in both zones
- Air flow from clean to dirty
- Instruments flow from dirty to clean

14

What would you find in a dirty zone of a single decontamination room? (5)

- Washing sink
- Rinsing sink
- Ultrasonic bath
- Preliminary inspection area
- Thermal washer disinfection

15

What would you find in a clean zone of a single decontamination room? (4)

- Inspection area
- Steriliser
- Package area
- Storage area

16

What are the applications of high risk contamination instruments? (4)

- Penetrate soft tissue
- Contact bone
- Enter normally sterile tissues or blood stream
- Close contact with break in skin or mucous membrane

17

What are the applications of medium risk contamination instruments? (3)

- Contact non-intact skin
- Mucous membrane
- Body fluid

18

What are the applications of low risk contamination instruments? (2)

- In contact with intact skin
- Does not come in contact with patient

19

Describe a double decontamination room (5)

- Dirty room
- Clean room
- Separate wash hand basin and storage for PPE in both zones
- Air flow from clean to dirty
- Instruments flow from dirty to clean

20

What is the aim of cleaning?

What cannot be carried out effectively if instruments are not clean?

- Decrease the bacterial load by thousand fold

- If the instruments are not clean, they cannot be sterilised effectively

21

Name 2 types of automated cleaning?

- Ultrasonic bath
- Thermal washer disinfector

22

Why is it important to avoid letting instruments dry out?

Blood is corrosive to stainless steel therefore, do not let instrument dry out

23

What type of detergents are recommended in manual cleaning?

Non-foaming detergent

24

What type of brushes are recommended in manual cleaning?

Use long handle soft nylon brushes

25

What temperature is recommended in manual cleaning?

Water temperature should not be more than 45°C to avoid protein coagulation

26

What type of drying instrument is recommended in manual cleaning?

Use disposable lint free cloth (paper towel) to dry instrument

27

What type of instruments can be put in an ultrasonic bath?

For metal instrument not plastic (absorb ultrasonic energy)

28

Does an ultrasonic bath disinfect instruments?

Only clean but does not disinfect instruments

29

Why is the thermal washer disinfector the preferred cleaning method? (2)

- More efficient in reducing bacterial load during pre- sterilisation cleaning
- Enhanced staff safety as handling sharp contaminated instruments is significantly reduced

30

Why should Gluteraldehide not be used as a chemical disinfectant?

Irritant and sensitise the skin, eyes and respiratory tract