decontamination Flashcards
what contributes to effective decontamination
facilities fit for purpose and well organised
equipment that is validated. undergoes testing and maintenance to ensure it is functioning correctly
establishment of a standardised decontamination process
effective management of process
staff trained in all decontamination procedures used in the practice.
what are three three methods available to clean reusable instruments?
WD - preffered
manual
US bath
PPE required for manual cleaning
household
gloves, facemasks, eye protection,
plastic disposable aprons and adequate
footwear
5 stages of washer disinfector in order
flush
wash
rinse
thermal disinfect
dry
temperature of flush stage of WD
<45 degrees celcius
why is less than 45 degrees used to flush
to prevent protein coagulation or fixing of soil to the instrument
purpose of flush stage
remove gross debris/contamination
temperature of thermal disinfection stage of WD
80˚C for 10 minutes,
or 90˚C for 1 minute.
purpose of wash stage
removes remaining soil - mechanical and chemical processes break up contamination
purpose of rinse stage
removes detergent used in wash
4 factors contributing to successful WD use
do not overload
open hinges and joints of instruments fully
follow written procedure based off manufacturer instructions
train staff on correct operation
what should you not clean ultrasonically
handpiece
4 ultrasonic cleaning procedures
Follow the practice’s written procedure based on the manufacturer’s instructions
run before loading to de gas
do not overload or overlap
Ensure that joints or hinges are opened fully and dissemble instruments
disadvantages of manual cleaning
greater risk of sharps injury
cannot be validated
aerosol risk
why cant instruments be air dried
inadequate drying might enable moisture to be trapped, promoting corrosion and/or
microbial growth
general housekeeping checks for WD
checking the spray arm for rotation
checking the spray nozzles for blockage
removing and cleaning strainers and filters
which guidelines provide technical guidance on how to choose, use and validate equipment for decontamination
processes?
SHTM - Scottish Health Technical Memoranda
SHTM 2030 for WD and US
SHTM 2010 for sterilization
when do you wrap before sterilising?
when using a vacuum sterilizer
what is the preffered temperature-pressure-time relationship for all small steam sterilizers?
134–137°C
2.1–2.25 bar guage pressure
at least a 3 minute
steam steriliser temperature
134-137
how does a type N remove air and what load can it carry?
passive removal of air gravity displacement by steam aka non-vacuum steriliser
unwrapped solid items-unsuitable for hollow or lumen
how does a type B remove air and what load does it carry
Bader does it all
forced air removal using vacuum pump aka vacuum steriliser
wrapped or unwrapped solid or hollow instruments
sterilized vs sterile what is difference
sterilised - have been cleaned, inspected and have undergone sterilisation unwrapped then stored in a way to limit re contamination
sterile - cleaned, inspected, wrapped then undergone sterilisation then stored in wrapping - can buy single use sterile items
when do you perform steam penetration test
daily on type B or type S
