107 terms

ST 220 - Study Guide

What are the 2nd most frequent nosocomial infections?
What is the most plentiful packaging material?
What kills most microbes EXCEPT spores?
intermediate-level disinfectant
Any condition caused by a fungus
What is an advantage to presoaking in tap water?
prevents the drying of organic material
Sterlization time for Wrapped Instruments
Prevacum, 270 - 4 mins
Gravity, 250 - 30 mins
Metal, Nonporous, no lumens
Gravity, 270 - 3 mins
Prevacum, 270 - 3 mins
unwrapped instruments w/ no lumens
Gravity, 270 - 10 mins
Pravacum, 270 - 4 mins
Gravity, 250 - 20 mins
metal, porous w/ lumens
Gravity, 270 - 10 mins
Prevacum, 270 - 4 mins
wrapped basin set
Prevacum, 270 - 4 mins
Gravity, 250 - 20 mins
unwrapped instruments, no lumen
Gravity, 270 - 3 mins
Prevacum, 270 - 3 mins
Gravity, 250 - 15 mins
the contamination of a person or object by another person or object
The stockinet cuffs of the surgical gown are considered ...
non-sterile, contaminated
The area to be prepped for a breast surgery ...
shoulder, upper arm and extending down to the elbow, axilla and the chest to the table line and the shoulder opposite from the infected side
amount of gross organic debris or the number of microorganisms on an object at any given time
HBV coexists with ...
Hepatitis D
An infection is usually accompanied by a fever.
HIV compromises what?
The Immune System
What type of packaging material is easily torn or punctured?
What type of packaging material is economical, reusable?
What should be labeled on an item for sterilization?
1. Contents of the package
2. shelf-life
3. date of sterilization
4. ID of sterilizer
5. cycle number
6. employee initials
7. department to be sent to
Cidex is AKA ...
2% glutaraldehyde
Immersion time for sterilization with chlorine compound?
1 hour
Immersion time for sterilization with glutaraldehyde?
10 hours
Immersion time for sterilization with peracetic acid?
12 minutes
Intermediate disinfectants
phenolic compounds, quaternary compounds, Iodophors, Alcohol
physical removal of soil, debris, blood and body fluids
In what unit is peracetic acid used?
Name the performance characteristics of packaging materials.
1. efficiency
2.ease of opening
3. sterilization suitability
4. strength
5. barrier efficiency and support impermeability
6. seal integrity
7. safety
8. sterility maintenance
What can also serve as sterilants w/ adequate exposure time?
Name the disinfectant efficiency factors
1. concentration level of agent
2. number and type of microbes present
3. contact time
4. physical factors
high- level disinfection takes how many minutes of exposure time?
20-30 mins
low-level to intermediate level disinfection takes how many minutes of exposure time?
10-15 mins
Presoaking in a detergent is an advantage, why?
keeps organic debris moist while loosening dried-on debris
What is the advantage for enzymatic presoaking?
breakdown organic soil
What is necessary before disinfection?
What are the methods of sterilization?
steam, chemical agents, high velocity electron bombardment, ultraviolet radiation
What is the 3 sink method used for?
manual cleaning of instruments
What are the principles of the decontamination room environment?
1. filtered air is exhausted outside the facility
2. the minimum air exchange rate is 10X p/hr
3. Tempuratue between 64-70 degrees F w/ a humidity of 35 - 72%
4. negative air pressure is maintained
the destruction of all microbes in or about an object
What are the duties carried out before prep?
wipe down the OR, postion the Pt, and anesthesia
Is chemically induced hypothermia infectious?
What provides rapid reduction in skin microbial counts and should be removed in 2-3 minutes to prevent skin irritation?
How far away must an unsterile person remain from a sterile field?
12-18 inches
What type of packaging material is not recommended for ETO sterilization?
How should a sterile person pass an unsterile person?
With their back to the unsterile person.
Is anyone permitted to walk between two sterile fields?
What performance standards should sterilization packaging meet?
1. maintain sterility
2. allowing opening while maintaining sterility
3. allow for pentration of the sterilant
multiplication of organisms in the tissues of a host
How does the FDA list sterilization wraps?
Class II
What hepatitis are health care workers at particular risks for?
Hepatitis C
At any time, is covering a sterile table for later use permitted?
Which machine lubricates in one of it's cycles?
What is the perimeter that is considered sterile inside the sterile wrap?
Everything except the 1" border around the edges.
Once a drape has been placed, can it be moved? Even with careful positioning?
When opening a sterile package, what is the order of the flaps?
Away from you, Sides and then toward you
What is the order for opening the initial sterile field?
back table, basin, instruments and gown & glove
Any item extending below the table edge is considered contaminated.
Tubes and cords are secured to the field by what?
drapes and towel clips, hemostats
Where can an unsterile person touch sterile drapes and how can they help drape the patient?
below table level they can touch; they can help by plugging in cords and suction and straigtening the bottom of the drapes.
Can sterile solutions be recapped why or why not?
no, contamination will occur
Cidex, without surfactant, has a shelf life of what?
14 days
Which antiseptic must be used several days in advance of surgery to build up a cumulative antimicrobial effect?
Which antiseptic is less likely to cause skin irritation and does not need to be removed?
When does draping begin?
after prep
How long should the cuffs on the towel drapes be and which why should the fold be?
2" cuff, 3 toward yourself and 1 away from you
Maximum size of linen packet?
By the rules of sterile technique, should drapes be passed over a nonsterile field?
What is the order of placing towel drapes?
side closest to you, superior, inferior and side farthest away from you
Which type of packaging material is inexpensive and one time use?
Can misplaced drapes be covered with another drape?
A contaminated drape is removed by whom?
What is the lowest point in the sterile person's body considered sterile?
waist or table edge
Are sterile gloved hands ever allowed to fall below waist or table level during draping?
Gas Sterilization Adavantages:
1. can be used to sterilize materials too heat sensitive for steam sterilization
2. less corrosive on metals
3. less damaging to sensitive plastic and rubber materials
Gas Sterilization Disadvantages:
1. personnel hazards are created by the use of EtO gas
2. the Eto sterilization processf is damaging to certain materials, requiring the availibility of more than one alternative process
3. Aeration times required with the EtO sterilization process can be extraordinarily lengthy - up to 21 days with internal pacemakers
How is Cidex used?
used as a disinfectant or as a sterilant it is sporicidal
How long does a complete cycle in a Steris unit take?
30 minutes
What type of packaging material is least effective at providing a bacterial barrier when compared to other wrapping materials?
The water in the Steris unit is warmed to what degrees?
50 - 55 degrees C
What type of sterilization should be used for plastic, rubber and porous instruments?
In steam sterilization what factors are critical to the outcome of the sterilization process?
1. Time
2. Contact
3. Tempurature
4. Moisture
5. Pressure
What are the methods of monitoring the sterilization method?
mechanical, chemical, and biological
Enzymatic Cleaner
breaks down organic debris, usually used as a soaking solution, requires dilution in warm water because it increases the speed of chemical reaction
Ultrasonic Cleaner
for use in ultrasonic cleaners, may contain surfactant and chelating agents
Manual Detergent
used for hand cleaning & presoaking, must be diluted, safe for use on most materials, mechanical action is required for soil, must be throughly rinsed
Washer-Decontaminator Detergent
Liquid solution available in 3 different pH levels.
1. neutral pH - less corrosive to instruments but less effective
2. moderate pH- low level alkaline, may be combined w/ surfactant & chelating agents, safe for use on stainless steel instruments but could be harmful to the chromium oxide layer that protects the instruments from corrosion
3. high pH- most effective for removing heavy amounts of soil, can be corrosive to stainless steel, must be neutralized in a neutralizing rinse to prevent damage to the instruments
Step One - Rigid Containers - Sterilization Recommendations
can be safely sterilized in the same load with other supplies. the containers should be places on shelves beneath absorbent items to prevents condensate from the containers dripping onto the absorbing items
Step Two - Rigid Containers - Sterilization Recommendations
drying phase should be increased to allow for revaporization of moisture and condensation on the outside and inside of the container
Step Three - Rigid Containers - Sterilization Recommendations
prevaccum sterilization should be used instead of gravity because of the increased difficulty of adequate air removal
Step Four - Rigid Containers - Sterilization Recommendations
gaskets should be inspected and replaced if torn or cracked or nonpliable
Step Five - Rigid Containers - Sterilization Recommendations
disposable filter should be replaced after every use
What are the cycles for a washer - decontaminator?
1. Pre-rinse cycle - enzymatic solution
2. Cleaning Cycle- detergent solution
3. Final Rinse - hot water, 180-195 degrees F
4. Dry Phase - high tempurature dry air
What are the cycles for a washer-sterilizer?
1. Pre-rinse - removes blood and tissue
2. Automatic Detergent Injection - injects the measured amount of detergent
3. Fill Phase - chamber is filled with water for total immersion and cleaning
4. Wash Phase - water is agitated for soil removal, machine controls water tempurature
5. Post-Rinse - loose soil and detergent film are rinsed off
6. Sterilization Phase - steam sterilization
7. Lubrication - "milking"
8. Drying
Thermal sterilization items
most metal surgical instruments, powered instruments (per manf. instructions), microinstruments (per manf. instructions)
Gas sterilization items
powered instruments, delicate instruments, fiber-optic instruments, lensed instruments, plastic, rubber porous instruments, moisture or heat sensitive instruments
Chemical sterilization items
lensed instruments, fiber-optic instruments and cables, heat-sensitive instruments
What is the instrument cycle in order?
1. Inspection - decontamination room, cleaned and disinfected
2. Moved to clean processing area where they are reassembled and sterilized.
3. Prepared and stored in sterile supply room where cases are pulled.
destruction of pathogenic microbes and their toxins
process in which most but not all microorganisms located on animate surfaces, such as skin, are destroyed
refers to an agent used to interfere with the growth and development of microorganisms
the destruction of all microorganisms, including spores, on inanimate surfaces, through the use of steam or chemical sterilization, electron bombardment or irradiation
the physical removal of soil or debris, blood and body fluids
destruction of pathogenic microbes or their toxins
how does an ultrasonice washer work?
uses high-frequency sound waves which are converted to vibrations in the solution. these waves travel through the cleaning agent, causes molecules to be set in rapid motion forming microscopic bubbles on the surface if the instruments. The bubbles enlarge and become unstable and implode causing a vacuum dislodging minute particles of soil and organic material from the instruments.
Technique for pouring fluids onto the sterile field:
1. Verify the "five rights"
2. Verify Pt. allergy status
3. Circulator should approach the field maintaining @ least a 12 inch distance.
4. The STSR and circulator will verify the solution (name, strength and exp. date)
5. Hold the solution approx. 12 inches above the container.
6. Once poured perform ad third visual/verbal verification.
7. Recap fluid and dispose. NEVER recap and reuse.
8. STSR labels fluid.
9. Fluid is prepared for use.
How should a sterile person pass another sterile person?
back to back or front to front