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what are the 2 classes of chemical sterilization?
liquid sterilization is used mostly for ____ and is more common than gas.
what are the 2 liquids used in cold trays?
gluteraldehyde is only used on _____ and _____
things placed in a cold tray are only considered ____ not sterilized
why is gluteraldehyde not used on living tissues?
what liquid is used on living tissues?
what is this used as @ school?
- scrub solution
gases are used for things that cannot tolerate a high temp like an _____
what are the 2 gases used?
- ethylene oxide
- hydrogen peroxide gas plasma HPGP
what are the uses for ethylene oxide?
how does EO gas work?
deactivates DNA (no repro of MOs)
what are the adv. of EO gas?
- low temps
what are the dis adv of EO gas?
(takes how many hours + air out time)
- slow!! takes 12-24 hours, then 7 days of ventilation
which gas is more common, EO or HPGP?
why is HPGP used?
to replace EO, only lol
what is the adv of HPGP?
safe for personnel and environment
what is the disadv of HPGP?
cannot penetrate walls of instrument (lumen)
what is required with every sx pack?
this indicator changes color when exposed to heat and doesnt indicate sterility
indicator that uses vials or paper strips impregnated with bacillus stearothermophilusthen cultured (takes 2 days)
envelopes and bags use a ____ change to indicate sterility
the practice of soaking objects in disinfectant solutions (dull sharp edges)
sterility is not garunteed
used for dirty or minor procedures (fe. neuter)
also used for inst. that shouldnt be autoclaved
cold sterilization using a cold tray
procedure for ____ sterilization:
soak for 15mins in solution
to be considered sterile they must soak for 3 hours
solution should be changed every 2 w. (14d)
cold trays should be labeled with ___ and ___
what are some examples of chemical disinfectants?
- quaternary ammonium compounds
what are some examples of antiseptics?
what are the ex of phenols?
when are phenols commonly used?
allergy to chorhexidine
what is important to remember about using lysol to clean?
allow to dry first! allergies may occur
what should never be mixed with bleach?
what are the 2 examples of quaternary ammonium?
- benzalkonium chloride
quaternary ammonium is not effective against ___ & ____
what are the 2 examples of aldehydes?
what are the 2 types of alcohol?
why should alcohol never be used on open wounds?
alcohol is ineffective against ____ & ____, making this a _____
- spores and viruses
what is the final paint?
50-70% ethyl or isopropyl alcohol on the pt.
what conc. of alcohol should not be used on pts.?
*what is it used for?
- disinf. suture materials
one of the first disinfectants used
can be cytotoxic if not diluted (1:30)
list an example
- chloride comounds
what is an example of a chloride compound?
- sodium hypochlorite
- aka bleach
not common in veterinary med.
only on intact skin
must be greatly diluted to use on skin
(tincture: 2% ___ & 50% ethyl)
iodine combined ith a carrier molecule
this is more commonly used in vet med
used as scrub
what is an ex. of idophors?
providine-iodine scrub (detergent) solution (no detergent)
what are the different effects of idophors compared to iodine?
- slowly releases free iodines
- reduces irritation/staining
what are the 2 biguanides?
what is the difference btw the 2?
- chlorhexidine (nolvasan)
- nolvasan S-used only on inanimate objects!
nolvasan solution is used as a ____ ____ if diluted
is there an ideal chemical disinfectant?