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ºÝºÝߣ share porous load autoclave wet loads
- 2. What isawetload? • When an autoclave load is removed from the chamber, the load must be dry. In moist environments microbial growth can occur. • Dryness is difficult to define though, so at what level is any condensate acceptable? At Thermal Compliance we define it as, if condensate can be detected by the senses, it is not acceptable. Therefore you must not: • See it • Feel it
- 3. Autoclave Basic overview of how a Porous Load Steam Steriliser works Steam pressure is controlled to ensure the drain is the correct temperature. Baffle plates force steam to displace air down the drain. Condensate will collect if not allowed to free drain.
- 4. Potential Causes Wet loads can be caused by several factors: Steam Distribution / Steam Quality Issues • Failed Steam Traps • Steam Generator Issues Autoclave • Jacket Temperature • Vacuum Pump Issues • Fans. Pipework on Roof of Chamber Load Design and Preparation • Change in Load Wrapping • Load Item Materials of Construction • Poor Load Orientation • Poor Load Wrapping
- 5. Potential Causes Steam Distribution / Steam Quality Step 1 Perform Steam Quality Testing (EN285:2015, PDA Technical Report 1) • At Point of Use • At Point of Generation Step 2 Perform a Distribution Survey • Check Steam Traps • Pipe levels etc
- 6. Potential Causes Load Design and Preparation Ensure the bags used for wrapping are specified correctly, ensure they are: • The right size for your items • The right shape for your items Load Wrapping Cut bags to Size Use suitable Size bags Don’t fold over bags Remove Excess Wrap Orientate the load to: • Allow free draining • Place large items on the bottom shelf • Consider where condensate would be generated and how to remove it Orientation of Load Paper/Plastic Bags should be orientated with paper adjacent to paper and plastic adjacent to plastic. Bag placement
- 7. Potential Causes Autoclave The Jacket temperature should be below sterilisation temperature. To allow condensate to form and go to drain. High Temperatures may cause superheat and low temperatures may cause condensate to rain onto the load. Vacuum Pump Check feed water temperature Check pulse times and depths. Does the wet load correlate to ports, fans etc in the Autoclave Roof?
- 8. 0201 ABOUT US We deliver practical and online training courses in: • Autoclave Validation • Temperature Mapping • Steam Quality Testing • Kaye Validator 2000 Training We can help with: • Wet Loads • Superheat Investigations • Equilibration Failures • Steam Quality Failures • Biological Indicator Failures Consultancy 03We perform Validation on a wide range of equipment: • LN2 Freezers – Ovens • Autoclaves and SIP • Freeze Driers • Dry Heat Processes Validation
- 9. CONTACT US Chris Maughan Managing Director Thermal Compliance chrism@thermalcompliance.co.uk www.thermalcompliance.co.uk 18 Harelands Courtyard Offices Moor Road Melsonby Richmond DL10 5NY UK Tel +44 (0)1748 327 247 www.thermalcompliance.com (Training Website)