VN Q3 Cleaning agents
Terms
undefined, object
copy deck
- Ideal disinfectant (7)
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kills all pathogens
fast acting
nontoxic
residual action
noncorrosive
not easily inactivated
low cost - antiseptic vs disinfectant
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antiseptic - living tissue
disinfectant - inanimate objects - advantages of alcohol
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bactericidal
noncorrosive - disadvantages of alcohol
-
evaporates quickly
easily contaminated
harsh on injured tissue
coagulates cell proteins
does not get spores, fungi - ideal use for alcohol
- last layer in sx scrub
- Aldehydes
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eg. Formalin
used little now
vary caustic
cold sterilization - Oxidizing agents mode of action
- react w/ protein molecules of cells causing O2 exchange which deactivates enzymes
- Oxidizing agents - examples
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iodine base
povidone iodine compounds
BisGuandine compounds
Chlorine
H2O2 (hydrogen peroxide) - Iodine base agents
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sx prep of skin
somewhat irritating
stains
little risidual effect
bactera, viruses, fungus, some spores - Povidone Iodine Components
-
slower release of iodine
easily inactivated
no residual effect
stains
bacteria, fungi, viruses, protozoa -
BisGuanide Compounds
(Chlorhexidine - Nolvosan) -
alter cell wall permeability
good residual activity
bacteria, viruses, fungi (ringworm)
Epidene -reddish - Chlorine (bleach)
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widespread use
cheap
easily inactivated
caustic, irritating
stains
no residual effect
clean area before use
viruses, fungi, bacteria, algae (no spores) - Hydrogen Peroxide (H2O2)
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degrades into O2 and H2O
breaks down membranes
not effective against nonenveloped viruses - Surfactants/Detergents
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Quaternary ammonium compounds
reduce surface tension
easier to detach material
emulsify lipids
long contact time
expensive - Phenolic Derivatives
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Bis-Phenol: hexachlorophene
very corrosive, irritating
rarely used - Ethylene Oxide
-
poisonous
used for autoclaving one-time objects
longer sterilization time, but lower temp
does not ruin delicate objects - Steps in cleaning cage
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remove organic matter
soak with detergent & rinse
bleach + H2O 1:32, leave on 10-15 min & rinse
roof, door, sides, floor - Anionic detergent
- has free negatively charged ions that precipitate when combined with calcium and magnesium in hard water
- Cationic detergent
- contains positively charged ions that remain suspended in solution
- Biocide
- kills living organisms
- Sanitize
- reduce number of microbes to safe level
- Detergent
- chemical that contains free ions and leaves film on surfaces