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27 Cards in this Set
- Front
- Back
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What is sterilisation?
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Removal/destruction of pathogenic micro-organisms
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Chemical is?
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Cold sterilisation
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Physical is?
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Heat sterilisation
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Chemical
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Irradiation, ethylene & glutaralohyde
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Physical
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Dry hot air oven & autoclaved
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Why must instruments and materials be cleaned?
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micro-organisms, concealed blood, organic debris
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PPE
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GLoves, Aprons, Footwear and goggles/sheild
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Electronic
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Removal of bacteria by cavitation
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All instruments should be?
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Treated individually, dried, checked for damage n lubricated, stored by hanging n racking
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Dry heat sterilisation?
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Basic dry heat oven, convection oven & high vacuum assisted oven
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These all...
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Kill micro-organisms by oxidative destruction of bacterial protoplasm; economical to run, cheap n small
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Why must high temps be used?
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<140 will not kill spores within 5 hours
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What are they used for?
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Glass, cutting instruments, drill bits, powders & oils
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Damages?
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Plastic, fabric & Rubber
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Requires a...
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Long cooling period
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Not commonly used in practice
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High temps & long cooling periods
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Recommended temps for glassware n drill bits
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180 degrees, 60mins
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Recommended temp for powders & oils
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160 degrees 120 mins
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Recommended temp for sharp cutting instruments
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150 degrees 180mins
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Moist heat sterilising..
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Common in veterinary practice & more efficient
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Moist heat sterilisers are a combination of?
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Heat, , pressure & moisture
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How to prepare a moist heat steriliser?
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Remove air from bag so steam isnt inhibites from reaching material and check water levels
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Standard pressure for moist heat is?
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15 pound s per square inch at 121 degrees for 15mins
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Remember!
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Water boils at 10 degrees, high temp not pressure will kill micro-organisms. ...High temp=Shorter sterilisation time
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Types of autoclave?
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Upward, Downward, Vacuum assisted
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Upward autoclave?
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Horizontal/Vertical
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Downward autoclave=
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horizontal
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