Decon Flashcards
what is the definition of a critical device
device that penetrates soft tissues, makes contact with bone and enters or contacts bloodstream
what is the definition of a semi-critical device
device that comes into contact with non-intact skin or mucous membranes but does not penetrate soft tissue
what is the definition of a non-crital device
device that only comes into contact with the skin and intact mucous membranes
what are the stages in the life cycle for processing instruments
cleaning
disinfection
inspection
packaging
sterilisation
transport
storage
use
transport
name three reasons why instruments are cleaned before sterilisation
minimise spread of contamination
to achieve steam contact
legal requirement
what is the type B steriliser
vacuum type
what is the type N steriliser
non-vacuum type
what is an operator
defined as a person with the authority to operate a WD
what are the two types of manual cleaning methods
immersion
non-immersion
what are the recommendations for manual cleaning
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
why may instruments need to be scrubbed below the surface of the water
instruments must be in contact with water and detergent
minimise splashing
minimise aerosols
when should manual cleaning be carried out
specifically recommended in manufacturers instructions
no alternative
WD or ultrasonic has failed to remove contamination
what is the ultrasonic bath
considered a back up option for the WD
how does the ultrasonic operate
uses soundwaves at high frequencies to produce bubbles that implode and have scouring effect on the hard surface of instruments
what is the process of cavitation in an ultrasonic machine
sound waves pass through the water causing micro-bubbles to form
fluctuation in pressure causes bubbles to expand and then collapse
what is the operating temperature for the ultrasonic
between 20-30 degrees
what must be ran before instruments can be cleaned in an ultrasonic
degas cycle
what must be recorded from the degas cycle of an ultrasonic
date
cycle number
detergent added
temperature
time
operator name
what must occur following manual or ultrasonic cleaning
they must be processed through the WD
name the stages of the WD
pre-wash
wash
rinse
thermal disinfection
drying
what is the temperature for the prewash stage
less than 35 degrees
what is the temperature for the wash stage
dependent on chemical used
what is the temperature for the rinse stage
less than 65 degrees
what is the temperature required for thermal disinfection
90-95 degrees for minimum hold of one minute
what is the temperature for the drying stage
100 degrees
name five daily checks for the WD
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
name four loading requirements of the WD
clip trays must be used and positioned correctly
hinged instruments open at the hinge
all assemblies must be disassembled
no overlapping equipment
what is used for inspecting instruments after the WD
illuminated magnifier
if following inspection after WD there is still contamination, what can be carried out next
process through ultrasonic or manual cleaning
after ultrasonic or manual cleaning they must go back through the WD
give three reasons why steam sterilisation is used
non-toxic component
no waste except pure water
main ingredient is water which is readily available
what are the four types of purified water that can be used in the steam steriliser
reverse osmosis
de-ionised
distilled
sterile
what cannot be processed in a type N steriliser
channelled or lumened instruments
wrapped instruments
what is the temperature required for steam sterilisation and what is the corresponding pressure for this
134-137 degrees celsius
2.05-2.35 bar gauge
3.05-3.35 for pressure ABSOLUTE
how long must the steam sterilisation hold the temperature of 134-137 degrees for
3 minutes
name five daily tests for the steam steriliser
check door seals are intact
verify the chamber is free from damage
verify condition of load carrier
steam penetration test
drain used water reservoir
give 2 examples of steam penetration tests
Bowie Dick test pack
Helix
what weekly tests are required for steam sterilisers
air leakage test
air detector function test
what must the container for transporting instruments be (4 points)
rigid sided
tight fitting lid
leak proof
colour coded or clearly marked
what guidance documents are available for steam sterilisation
SHTM 01-01 part C
name five factors related to the ability to clean instruments properly
time
temperature
water
chemicals
energy
what is sinner circle and what are the four elements
it shows the 4 key elements required for successful cleaning process
energy
temperature
time
chemicals
what part of the SHTM 01-01 is referenced for Automated Cleaning and Disinfection (WD)
part D
what are the four weekly tests for a WD on top of the daily tests
water hardness
water conductivity in final rinse
cleaning efficacy test by residual soil detection
what are the quarterly tests for a WD on top of daily and weekly tests
thermometric tests
doors and door interlocks
chemical dosage checks
what are the weekly tests for the steam steriliser on top of the daily tests
air leakage tests
air detector function tests
automatic control test
how should sterile medical devices be stored
in a manner that will not compromise their quality including the sterility status
what is the definition of a medical device
instrument to be used for
- diagnosis, prevention, prognosis or treatment
- investigation, replacement, modification of anatomy
- devices for control or support of conception
what is SHTM
scottish health technical memoranda (01- 01 focuses on decon in CDU)
which part of SHTM focuses on decontamination in LDU
SHTM 01-05
what protection act is relevant to verify the equipment we use has gone through rigorous testing
the consumer protection act
what should instruments be marked with if they are from a reputable company
CE (UKCA)
what information is required in the automatic control test (ACT) about the cycle data for a WD
cycle number
wash temperature
disinfection temperature
cycle duration
what information should be recorded from the sterilisation process
operator
date
time started
cycle number
sterilisation temperature
if sterilisation was successful
where can you find information about buying dental instruments and staff training
SDCEP
what is a CP(D)
competent person (decontamination)
the person designated to carry out maintenance, validation and periodic testing of WDs and sterilisers
what does lubrication of handpieces provide
prevents build up of scale
keeps fine spray nozzles free
what are the top 5 handpiece faults
incorrect or inadequate lubrication
poor or inadequate cleaning
incorrect instrument usage
damaged or oversized bur fitted
incorrect compressor settings
what should never be used to clean handpieces
ultrasonic baths
