Sterilization and disinfection Flashcards

0
Q

positive pressure vs. negative pressure

A

positive- air flows only from patient room to corridor (in to out)
negative- air flows from corridor in, not from patient room out ( highly infectious disease)

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1
Q

antiseptic

A

used only on skin disinfectant

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2
Q

autoclaving

A

moist heat of 121 Celsius, 15 psi, 15 will kill c. botulinum spores

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3
Q

sterilization

A

most important consideration is whether object to be sterilized is free of organic matter ( blood, fecal material, tissue)

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4
Q

Spore test

A
negative test ( Sterile)- successful! 
positive test ( not sterile)- pH of medium change due to growth of bacteria, acid growth
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5
Q

4 elements that can sterilize

A

Halogen- chlorine, iodine ( used well)
Aldehydes- sterilize well (glutoaldehyde or cidex)
ethylene oxide- gas that sterilize
peroxygens- strong oxidizer

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6
Q

good disinfections and chemical sterilizer

A

halogens: iodine and chlorine. prevents liquid from evaporating and decontamination of water
alcohol: kill bacteria and fungi, but not endospores and non enveloped viruses, not good for treating wounds since they cause coagulation of proteins

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