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15 Cards in this Set
- Front
- Back
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What is aseptic technique?
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Aseptic technique is a method used to control, exclude, or eliminate unwanted micro-organisms (contaminants) from specimens and test procedures
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What things are included in aseptic technique?
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-frequent washing of hands
-using barrier protection (glove, goggles, coats, masks, etc.) -sterilizing utensils -using disinfectants |
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What does the term asepsis mean?
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Asepsis is the non-existence of pathogenic bacteria
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What are 2 ways of obtaining asepsis?
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1. Physical method (sterilization)
2. Chemical method (disinfection) |
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What is the definition of sterilization?
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Sterilization is the complete obliteration of micro-organisms by physical methods
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What are the physical methods of sterilization?
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-Heat: moist heat and dry heat
-Radiation: ionizing (gamma rays) and non-ionizing (UV) radiation -Filtration |
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What sterilization method is best used to sterilize air and surfaces?
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Non-ionizing radiation (UV light)
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What is the definition of the term disinfection?
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Disinfection is the obliteration or removal of pathogenic micro-organisms
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What are some important factors when choosing a disinfectant?
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-exposure time
-bacterial concentration -concentration of disinfectant -toxicity of solution -disinfectant must be stable -disinfectant must be unscented |
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What does the term antiseptic mean and when is it used?
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Antiseptic is a disinfectant that is used on the skin when drawing blood cultures. This eliminates any contaminants from the normal skin bacteria
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What are Phenols?
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Phenols are a group of disinfectants that work by disrupting the cell membrane and changing the nature of the cell membrane
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What are Chlorhexidines?
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Chlorhexidines are a group of disinfectants that work by disrupting the cell membrane
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What are Halogens?
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Halogens (iodine and chlorine) are a group of disinfectants that work by restricting the function of the cell's protein (iodine). They also work by forming a reagent that will oxidize the cells and cause the content of the cell to be changed (chlorine)
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What are Alcohols?
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Alcohols are a group of disinfectants that work by changing the cell proteins and dissolving the fatty substances in the cell. Isopropanol and ethanol (70%)are the most common
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What are Aldehydes?
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Aldehydes are a group of disinfectants that work by deactivating the protein in the cell. Common example is formaldehyde which is used to preserve tissues
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