Manual Washing and Cleaning

Question 1

what PPE must you use when cleaning

Answer 1

apron
visor
rubber gloves

Question 2

what must there be for manual cleaning

Answer 2

a sink for washing and another sink for rinsing instruments

Question 3

what water is used for washing

Answer 3

standard tap water

Question 4

what temperature should water be when washing

Answer 4

30-35 degrees

Question 5

what happens if the water goes over 35 degrees

Answer 5

it can cause proteins to coagulate which makes them difficult to remove

Question 6

what is used for cleaning during manual washing

Answer 6

chemical detergents

Question 7

what are the 2 methods of manual cleaning

Answer 7

immersion and non-immersion

Question 8

how much detergent should be used per litre of water

Answer 8

5millilitres

Question 9

what brush should be used for cleaning

Answer 9

long handled, soft bristled brush

Question 10

why should a metallic brush never be used for cleaning

Answer 10

it can damage the instrument

Question 11

what are the reasons to use the immersion method of cleaning

Answer 11

instruments must be in contact with the water and detergent solution
minimise splashing
scrubbing above surface can produce aerosols

Question 12

when should manual cleaning be carried out

Answer 12

when recommended by manufacturers instructions
no alternative
automated process failed to clean them

Question 13

how does the ultrasonic bath work

Answer 13

uses soundwaves at high frequencies to produce bubbles that implode and have scouring effect against the hard surface of instruments

Question 14

explain cavitation

Answer 14

as sound waves pass through water they form bubbles
fluctuation in pressure causes sound waves which cause bubbles to rapidly expand and collapse

Question 15

what is the operating temperature of the ultrasonic bath

Answer 15

20-30 degrees

Question 16

what water is used for ultrasonic bath

Answer 16

tap water

Question 17

what should occur in an ultrasonic bath before instrument cleaning

Answer 17

degas cycle - standard production cycle

Question 18

why should a standard production cycle occur in an ultrasonic bath

Answer 18

air/gas bubbles inside water normally which collapse into air bubbles and effect efficacy of equipment and prevent proper cleaning of instrumentation

Question 19

what should be kept in an equipment log book for ultrasonic bath

Answer 19

date
cycle number
detergent added
temperature
time
operator name

Question 20

what should happen after manual or ultrasonic cleaning

Answer 20

rinsing in a separate sink

Question 21

what happens to instruments after rinsing

Answer 21

processed through washer disinfector

Question 22

what is the first stage of the cleaning process

Answer 22

washer disinfector

Question 23

what are the reasons for manual washing

Answer 23

manual scrubbing generates greater force than washer disinfector
some equipment must be manually washed

Question 24

what are the reasons for ultrasonic bath

Answer 24

ferocious process that is very good at removing contamination

Question 25

what are the reasons against manual washing

Answer 25

member of staff present for entire process
risk of aerosol production
risk of contamination of surrounding environment
inconsistency and human error
sharps injuries risks

Question 26

what are the reasons against ultrasonic bath

Answer 26

ferocious process can damage equipment
no automatic water changes in ultrasonic bath