decontamination sciences - what we know so far Flashcards
transport of instruments to LDU
- Rigid sided
*Leak proof - Tight fitting lid
- Colour coded
dirty box placed where
in agreed set down area
possibly same spot as unload area
PPE for decon
More easily manage the control of infections substance
Hand hygiene
* Most likely means of transporting infectious substances throughout an environment
* Carried out on entering and leaving an environment and between clean and dirty processes in LDU (5 points)
Donning and doffing as per SOP
* Gloves – protect against substances adhering to our hands
* Apron – prevent ourselves from becoming contaminated
* Face shield/visor – protect our face and eyes from splashes
washer disinfector
First stage in decontamination process
Daily checks first - Part of SOPs
Load in correct manner
inspections
Need to verify it has met standard required
Under illuminated magnifier
ID any biological matter possibly still present
Any contamination still present - further process
Hinges, joints, textured or threaded surfaces are prime locations and require thorough inspection
why need inspect instruments after washer disinfector
Limitation in LDU in capabilities of equipment compared to industrial processing units
If fail inspection, need manual cleaning and US bath
* Physical scrubbing something with brush can exert more force than the jets of water in the WD chamber
* Fore exerted by US energy is also greater
But then has to go back through WD after that
Because the high temperature and contact achieved during the disinfection part of automated cycle (90-95 degreesC min stage hold time 1min)
* Over 95% of all contamination and microbial presence removed
why do instruments need to go back in WD after manual cleaning
Because the high temperature and contact achieved during the disinfection part of automated cycle (90-95 degreesC min stage hold time 1min)
* Over 95% of all contamination and microbial presence removed
step after WD successful
steam sterilisation
steam sterilisation
- Capability to achieve all the recognised standards and set points – internationally agreed to constitute sufficient sterilisation
- Instruments are wrapped – they will be sterile after the process (B-type steriliser, Vacuum capable)
- Instruments are unwrapped – they will have just been sterilised (N-type steriliser, Gravity displacement)
after sterilisation instruments can be
transported
box should be
* Rigid sided
* Leak proof
* Tight fitting lid
* Colour coded (blue)
To procedure room or storage facility
basic stages in LDU
arrival dirty instruments
WD
inspection
(manual cleaning, US, WD)
steam sterilisation and packaging
transport
all done by Operator within decon environment
SOPs
standard operating procedures
* Standardise activity within department to make it reproducible and consistent
* Allow staff to easily identify correct process and follow it
** E.g. daily checks, hand hygiene, PPE*
* Decontamination overview on Moodle
guidance documents direct decon process
BS EN Standards that we should be operating our equipment in accordance with (British Standards of European Norms)
These are referred to as SHTM’s (Scottish Health Technical Memorandum) or HTM’s out-with Scotland
* regional differences so it worth familiarising yourself with the document most applicable for the location you work
purchasing equipment for decon should be in compliance with
Medical Device Directive which will soon be updated to the (MDR) Medical Device Regulation
why need documents and measures for decon process
ensure our equipment has been manufactured to agreed standards and that the machines are capable of achieving all of the set-points outlined within the guidance documents and standards
