Machine Cleaning Flashcards
what are the benefits of using a WD over manual cleaning
potential for human error
process poses a risk to the operator carrying it out
scrubbing has significantly higher mechanical force
what are the benefits of using WD over ultrasonic
ultrasonic does not disinfect or dry
contamination is removed from the surface in ultrasonics but remains present in the chamber
what are the stages in an automated WD
flush/ prewash
main wash
rinse
thermal disinfection
drying
what happens in the flush/ prewash phase
saturates the contamination and removes gross contamination
what happens during the main wash phase
supplemented by detergent to more effectively remove biological matter
what happens during the rinse phase
removes any remaining residue, biological or chemical before disinfection
what happens during the thermal disinfection stage
actively kills microorganisms with the use of heated water
what happens during the drying phase
use hot air to remove any remaining moisture from surface of instruments
when are proteins and prions that may be on instruments removed
during the wash phases - they are not affected by disinfection or sterilisation
what temperature must the flush/ prewash be carried out at
less than 35 degrees
what temperature should the main wash be carried out at
depends on the chemical used for the process
what temperature should the rinse stage be carried out at
less than 65 degrees
what should the temperature be for the thermal disinfection phase
between 90 and 95 degrees
what is generally the temperature for the drying phase
100 degrees
what are the daily checks for the WD
spray arms spin freely
spray jets on spray arm are not blocked
no debris on strainer/ filter
check condition of door deal
verify suitable amount of chemical in reservoir
record disinfection temperature of the first cycle
