BDS4 New Points Flashcards
The dirty/clean instrument boxes should be what?
-rigid sided
-leak-proof
-tight fitting lide
-be colour coded (red for dirty)
When loading the WD, you must follow the reccommendations of manufacturer/engineer. These are what?
-hinged instruments opened
-no overlapping or shadowing of equipment
-disassemble anything that can be
-don’t overload
Why are instruments inspected after being processed through the WD?
to verify the WD cycle has been carried out as expected
What are the daily tests for the WD?
-Automatic control tests (this is done for every piece of equipiment in the decon unit)
Includes the disinfection temperature and hold time *want this to be 90-95 degrees for 12 secs
What are the daily tests for a type B steriliser?
-steam penetration test
-ACT’s (correct temperature and pressure for sterilisation)
Also need to perform reserviour water changes
What are the weekly tests for Type B steriliser?
-air leakage tests
-air detector function tests
Why do we need to do water reserviour change for type B sterilisers daily?
-don’t want standing water in machines - can allow colonies to grow and biofilms to form
-if biofilm forms then machine is binned
What temperature and pressure is reuquired for sterilisation?
134 degrees and 305-335kPa (3.05-3.35bar) for 3mins
What is the air detector function test/how does it work?
-checking if there is any air in the chamber (the air will be cooler than the steam so steriliser must be able to identify this and compensate)
-the test checks at the back of the chamber (basically a thermometer) and induces a leak to see if the detector picks it up
Describe the weekly air leakage test for type B sterilisers.
-checking the integrity of the chamber (no air leaking into steriliser when the vacuum is formed)
What are the diffirent ways a steam penetration test can be carried out? What is it verifying?
-Bowie-Dick test
-Helix device
Is verifying the positive pressure part of the cycle
Describe the Bowie-Dick test
-Block of paper with a chemical indicator sheet in the middle
-need a 100% colour change to pass
-If don’t get 100% colour change, where the failure is on the paper will indicate what has gone wrong
Describe the helix device
-device with approx 2m of tubing
-put test strip into the device and steam has to penetrate through all of the tubing to change the colour
What should we be checking on our instrument packs?
That the chemical indicator has changed colour to verify the instrument has been processed through a steriliser
The equipment in a LDU are classified as what kind of device? What does this mean in terms of legislation?
-Medical devices
-when purchasing and operating a WD/steriliser etc it must be CE marked and comply with the conditions of the medical device regulations (these regulations determine what deviced are allowed on the UK market)
