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42 Cards in this Set
- Front
- Back
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Ultrasound is defined as |
sound waves that are above the frequency that can be heard y the human ear |
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How does Ultrasounds cleaning work? |
Mechanical vibrations of sound waves passed through a solution, produce innumerable minute bubbles that form and collapse thousands of times per second which produces a scrubbing action to the items immersed in the liquid |
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What is an ultrasound used for? |
Sanitizes the instruments in prep for sterilization after washing by hand |
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Cold Sterilization works by |
soaking objects in disinfectant solution |
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Cold sterilization is used when
examples are |
items can not be autoclaved
plastic sharp items |
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In handling cold sterilization items |
handle as if sterile however they are not entirely sterile |
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How long should items be cold sterilized |
over 3 hours |
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What should be done before items are cold sterilized? |
rinsed thoroughly |
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What is the advantage of using cold sterilization? |
Allows equipment/instruments to be used more than once a day |
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What type of procedures should cold sterilization be used following? |
minor procedures; lacerations, skin biopsies |
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What is the disadvantages Gas sterilization? |
-takes longer than steam -costs more -uses ethylene oxide (poisonous, irritation to the skin & mucuous membranes and is explosive and flammable) - Items are quarantined in a well ventilated area for a min of 24 hrs after sterilization -destroys metabolic pathways within the cells |
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What are the advantages of using Gas sterilization? |
The ability of ethylene oxide to penetrate microbes and packing materials
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What is the temp of Gas sterilization? |
Temp. 50-60 degrees c
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What is concentration of ethylene oxide in cold sterilization |
measured in mg/l |
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What is a factor that effects cold sterilizations ability to kill microbes? |
Humidity : amount of moisture present |
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What are the factors in timing when using cold sterilization? |
Depends on the temp, pressure, concentration, moisture, type of packing materials |
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What type of sterilization is most commonly used in veterinary practices? |
Autoclave |
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How does an autoclave work? |
by the use of heat as a killing agent |
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What provides the heat for the autoclave? And how does it work? |
steam provides the heat and promotes the penetration of the heat
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By what means is the heat created in an autoclave? |
Pressure is the means to create the heat need to successfully sterilize The increase in pressure the increase in the temp of the steam |
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What is the pressure that an autoclave needs to reach to sterilize?
What temp does that pressure make? |
15 PSI
121 degrees C (250f) |
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Under the proper pressure and temp how long should sterilization take with the use of an autoclave? |
13-15 minutes once it has reached 15PSI and 121 degrees c (250f) |
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What is the variable in the time and temp and psi in autoclaving? |
The type of packing material |
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What are the advantages of autoclave? |
Constantly achieves complete sterility if used correctly inexpensive and easy to use safe for most surgical instruments and equipment safe for patients and personal |
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What is the disadvantages of autoclave? |
staff may over estimate the ability of the autoclave sterility depends on saturation steam of the appropriate temp having contact with all objects within the autoclave for appropriate amount of time |
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The first step in use of the autoclave |
Check water level in reservoir if low add distilled water to fill line |
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The second step in use of the autoclave |
Load autoclave -Don't have materials touch sides or top -Don't over pack (it needs good circulation) |
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The third step in use of the autoclave |
Turn knob counter clockwise to fill position -watch water enter the bottom of the chamber until it reaches the metal water level bar |
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The forth step in use of the autoclave |
Close and latch the door |
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The fifth step in use of the autoclave |
Turn knob to sterilized position |
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The sixth step in use of the autoclave |
observe pressure and temp gauge - once the pressure reaches 15 psi and the temp reaches 121 c (250 F) - set the timer for 15 min |
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The seventh step in use of the autoclave |
Once the timer rings turn the knob to vent |
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The eighth step in use of the autoclave |
Once pressure gauge reads 0 open the door a *watch for steam venting*
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The ninth step in use of the autoclave
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Turn knob to off wait for temp gauge to reach 0 During this time items in autoclave are drying remove dry items and store appropriately |
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The tenth step in use of the autoclave
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remove dry items and store appropriately |
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What are the two steps of sterilization quality control of packs? |
1. an indicator strip should be placed in the central, least accessible portion of each pack and a color change should occur after successfully sterilized 2. Autoclave tape is placed in place on the outside of the pack a color change will also occur if sterilization is successful |
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How long does a single wrapped muslin sterile pack last? Closed cabinet Open cabinet |
Closed -1 week open -2days |
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How long does a doble wrapped muslin sterile pack last? Closed cabinet Open cabinet |
closed- 7 weeks open 3 weeks |
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How long does a single wrapped crepe paper sterile pack last? Closed cabinet Open cabinet |
closed - at least 8 weeks open 3 weeks |
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How long does a single wrapped muslin sealed in 3ml polyethylene sterile pack last?
Open cabinet |
at least 9 months |
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How long does a heat sealed paper and transparent plastic pouches last?
Open cabinet |
At least a year |
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Where should sterile packs been stored? |
In a dust free dry well ventilated area away from contaminated equipment. |
