3rd year key points Flashcards
WD loading requirements
basket furniture
no shadowing/overlap
hinged items kept open
disassemble instruments
WD daily checks
load carrier - damage or debris/instruments spray arms rotating freely jets not blocked door seal intact strainer not blocked enough chemical detergent
how should you rinse items?
below surface in a separate sink
steriliser daily checks
door seal intact
load carrier and chamber
- no debris/instruments/damage
fill water reservoir - pure water
why should you manually wash below surface?
minimise contamination and aerosol production
sinner circle
chemicals
time
temp
energy
transport
ASAP container - rigid, durable, leakproof - tight fitting lid - easy to clean and disinfect - clearly labelled as contaminated
what water is used for rinsing?
RO
purified and easy to make in large quantities
4 types of demineralised/purified water
sterile
distilled
deionised
RO
cleaning
removal of contamination from an item to the extent necessary for its further processing and intended use
“a soil removing process that requires energy which removes a high proportion of all microbes present inc bacterial spores”
what does cleaning presuppose?
nature of any likely contaminant is known and that it is possible to define a level below which it will have no adverse effect
corrosion
resistance - protective passivation layer
- easier to clean and harder for bacteria to cling on to
avoid damage - avoid wire brushes
non-immersion cleaning
wiping
wipe with detergent solution
clean non-linting cloth
never use brushes - aerosols
immersion cleaning
brushing
30-35 degrees
scrub under water using long-handled brushes with soft plastic bristles
minimise aerosols - never scrub under running water
neutral enzymatic detergent
if you find an item dirty at any stage what should you do?
start the whole process again
what shouldn’t be processed in an US?
handpieces
how do US machines work?
apply high freq sound wave
produce microbubbles
cause cavitation when they implode
energy released helps remove soil
why should you degass first?
air will inhibit cavitation
water stages
manual wash US manual rinse WD steriliser
cold mains water
manual washing
US
WD