Decon

Question 1

what is the definition of a critical device

Answer 1

device that penetrates soft tissues, makes contact with bone and enters or contacts bloodstream

Question 2

what is the definition of a semi-critical device

Answer 2

device that comes into contact with non-intact skin or mucous membranes but does not penetrate soft tissue

Question 3

what is the definition of a non-crital device

Answer 3

device that only comes into contact with the skin and intact mucous membranes

Question 4

what are the stages in the life cycle for processing instruments

Answer 4

cleaning
disinfection
inspection
packaging
sterilisation
transport
storage
use
transport

Question 5

name three reasons why instruments are cleaned before sterilisation

Answer 5

minimise spread of contamination
to achieve steam contact
legal requirement

Question 6

what is the type B steriliser

Answer 6

vacuum type

Question 7

what is the type N steriliser

Answer 7

non-vacuum type

Question 8

what is an operator

Answer 8

defined as a person with the authority to operate a WD

Question 9

what are the two types of manual cleaning methods

Answer 9

immersion
non-immersion

Question 10

what are the recommendations for manual cleaning

Answer 10

chemical doses based on manufacturers instructions (5milliltres per 1 litre of water)
temperature must not exceed 35 degrees
60ml of chemical per 12L of water

Question 11

why may instruments need to be scrubbed below the surface of the water

Answer 11

instruments must be in contact with water and detergent
minimise splashing
minimise aerosols

Question 12

when should manual cleaning be carried out

Answer 12

specifically recommended in manufacturers instructions
no alternative
WD or ultrasonic has failed to remove contamination

Question 13

what is the ultrasonic bath

Answer 13

considered a back up option for the WD

Question 14

how does the ultrasonic operate

Answer 14

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

Question 15

what is the process of cavitation in an ultrasonic machine

Answer 15

sound waves pass through the water causing micro-bubbles to form
fluctuation in pressure causes bubbles to expand and then collapse

Question 16

what is the operating temperature for the ultrasonic

Answer 16

between 20-30 degrees

Question 17

what must be ran before instruments can be cleaned in an ultrasonic

Answer 17

degas cycle

Question 18

what must be recorded from the degas cycle of an ultrasonic

Answer 18

date
cycle number
detergent added
temperature
time
operator name

Question 19

what must occur following manual or ultrasonic cleaning

Answer 19

they must be processed through the WD

Question 20

name the stages of the WD

Answer 20

pre-wash
wash
rinse
thermal disinfection
drying

Question 21

what is the temperature for the prewash stage

Answer 21

less than 35 degrees

Question 22

what is the temperature for the wash stage

Answer 22

dependent on chemical used

Question 23

what is the temperature for the rinse stage

Answer 23

less than 65 degrees

Question 24

what is the temperature required for thermal disinfection

Answer 24

90-95 degrees for minimum hold of one minute

Question 25

what is the temperature for the drying stage

Answer 25

100 degrees

Question 26

name five daily checks for the WD

Answer 26

check spray arms spin freely check spray jets are not blocked no debris in strainer or filter check door seal make sure there is enough chemical in reservoir

Question 27

name four loading requirements of the WD

Answer 27

clip trays must be used and positioned correctly hinged instruments open at the hinge all assemblies must be disassembled no overlapping equipment

Question 28

what is used for inspecting instruments after the WD

Answer 28

illuminated magnifier

Question 29

if following inspection after WD there is still contamination, what can be carried out next

Answer 29

process through ultrasonic or manual cleaning after ultrasonic or manual cleaning they must go back through the WD

Question 30

give three reasons why steam sterilisation is used

Answer 30

non-toxic component no waste except pure water main ingredient is water which is readily available

Question 31

what are the four types of purified water that can be used in the steam steriliser

Answer 31

reverse osmosis de-ionised distilled sterile

Question 32

what cannot be processed in a type N steriliser

Answer 32

channelled or lumened instruments wrapped instruments

Question 33

what is the temperature required for steam sterilisation and what is the corresponding pressure for this

Answer 33

134-137 degrees celsius 2.05-2.35 bar gauge 3.05-3.35 for pressure ABSOLUTE

Question 34

how long must the steam sterilisation hold the temperature of 134-137 degrees for

Answer 34

3 minutes

Question 35

name five daily tests for the steam steriliser

Answer 35

check door seals are intact verify the chamber is free from damage verify condition of load carrier steam penetration test drain used water reservoir

Question 36

give 2 examples of steam penetration tests

Answer 36

Bowie Dick test pack Helix

Question 37

what weekly tests are required for steam sterilisers

Answer 37

air leakage test air detector function test

Question 38

what must the container for transporting instruments be (4 points)

Answer 38

rigid sided tight fitting lid leak proof colour coded or clearly marked

Question 39

what guidance documents are available for steam sterilisation

Answer 39

SHTM 01-01 part C

Question 40

name five factors related to the ability to clean instruments properly

Answer 40

time temperature water chemicals energy

Question 41

what is sinner circle and what are the four elements

Answer 41

it shows the 4 key elements required for successful cleaning process energy temperature time chemicals

Question 42

what part of the SHTM 01-01 is referenced for Automated Cleaning and Disinfection (WD)

Answer 42

part D

Question 43

what are the four weekly tests for a WD on top of the daily tests

Answer 43

water hardness water conductivity in final rinse cleaning efficacy test by residual soil detection

Question 44

what are the quarterly tests for a WD on top of daily and weekly tests

Answer 44

thermometric tests doors and door interlocks chemical dosage checks

Question 45

what are the weekly tests for the steam steriliser on top of the daily tests

Answer 45

air leakage tests air detector function tests automatic control test

Question 46

how should sterile medical devices be stored

Answer 46

in a manner that will not compromise their quality including the sterility status

Question 47

what is the definition of a medical device

Answer 47

instrument to be used for - diagnosis, prevention, prognosis or treatment - investigation, replacement, modification of anatomy - devices for control or support of conception

Question 48

what is SHTM

Answer 48

scottish health technical memoranda (01- 01 focuses on decon in CDU)

Question 49

which part of SHTM focuses on decontamination in LDU

Answer 49

SHTM 01-05

Question 50

what protection act is relevant to verify the equipment we use has gone through rigorous testing

Answer 50

the consumer protection act

Question 51

what should instruments be marked with if they are from a reputable company

Answer 51

CE (UKCA)

Question 52

what information is required in the automatic control test (ACT) about the cycle data for a WD

Answer 52

cycle number wash temperature disinfection temperature cycle duration

Question 53

what information should be recorded from the sterilisation process

Answer 53

operator date time started cycle number sterilisation temperature if sterilisation was successful

Question 54

where can you find information about buying dental instruments and staff training

Answer 54

SDCEP

Question 55

what is a CP(D)

Answer 55

competent person (decontamination) the person designated to carry out maintenance, validation and periodic testing of WDs and sterilisers

Question 56

what does lubrication of handpieces provide

Answer 56

prevents build up of scale keeps fine spray nozzles free

Question 57

what are the top 5 handpiece faults

Answer 57

incorrect or inadequate lubrication poor or inadequate cleaning incorrect instrument usage damaged or oversized bur fitted incorrect compressor settings

Question 58

what should never be used to clean handpieces

Answer 58

ultrasonic baths