the condition of steam when its temp is too high relative to its pressure in a steam table
a heat transfer method in which heat is absorbed by an item's exterior surface, and passed inward to the next layer
the process of heat transfer by the circulation of currents from one area to another
devices intended for use with individual untis to demonstrate that the unit has been exposed to the sterilization process, and to distinguish between processed and unprocessed units
chemical indicators (CIs)
systems that reveal a change in one or more predefined process parameters on the basis of a chemical or physical change that results from exposure to a process
load control number
label information on sterilization packages, trays, or containers that identifies the sterilizer, cycle run, and date of sterilization
number of days that have elapsed since jan 1st
microorganism with a thick wall surrounding it that enables the organism to survive in adverse conditions including high temps
procedures used by equipment manufacturers to obtain, record, and interpret test results required to establish that a process consistently produces a sterile product
procedures used by healthcare facilities to confirm that the validation undertaken by the equipment manufacturer is applicable to the specific setting
the amount of time required to kill 90% of the microorganisms present
virus-like infectious agents that cause a variety of nerodegenerative diseases of human and animals, including CJD in humans
solutions that are administered to pts intravenously
solutions that are normally used for irrigating, topical application, and surgical use that are given orally or by inhalation
the continual movement of water from the atmosphere to the earth and back to the atmosphere
a water treatment process in which dissolved impurities are seperated from water by forcing the water through a molecular filter membrane
sterility assurance level (SAL)
probability of a viable microorganism being present on a product unit after sterilization
permissible exposure limits (PELs)
limits developed by OSHA to indicate the maximum airborne concentration of a contaminant to which an employee may be exposed over the duration specified by the type of PEL assigned to that contaminant
time weighted average (8-hour) - TWA
the employee's average airborne exposure in any 8-hour work shift of a 40-hour work week which should not be exceeded
the process by which ethylene oxide destroys microorganisms, resulting in the inablility of the cell to normally metabolize, reproduce, or both
the act or process of oxidizing: the chemical breakdown of nutrients for energy
process in which a device is actively subjected to moving air.
ex: items being sterilized with ethylene oxide gas
the amount of EtO that remains inside materials after they are sterilized
the procedure used by healthcare facilities to confirm that sterilization recommendations from the manufacturer can be successfully undertaken in the hospital setting is called...
the test used to evaluate the efficacy of a steam sterilizer's air removal system is called a .....
bowie dick test
the ________ is the portion of the steam sterilizer that measures steam temp and automatically controls the flow of air and condensate from the sterilizer chamber.
central service technicians should never use ______ to hold instruments together for sterilization
steam sterilization heats items within the load using a heat transfer process called
__________ steam sterilization can be used to sterilize liquids
the max weight of wrapped basins shouldn't exceed
the bacterial spore used for testing dry heat sterilization is...
dry heat sterilization heats items within the load using a heat transfer process called...
the "newest" low temperature sterilization process..
this method of low temp sterilization has been in use since the 1960s...
cycle time for items sterilized using hydrogen peroxide gas plasma..
less than 1 hr
bacterial spore used to test ethylene oxide sterilization cycles..
cycle time for items sterilized using ozone sterilization..
140 degrees F aeration time recommended for items sterilized with ethylene oxide..
bacterial spore used to test hydrogen peroxide gas plasma sterilization cycles..
cycle time for items sterilized using ethylene oxide sterilization..
sets exposure standards for chemical sterilants ..
requires that sterilants be rigorously tested before being marketed..
of the 3 major low temp steriliants, EtO has the longest instrument...
EtO, hydrogen peroxide gas plasma, and ozone sterilization process must all be monitored using...,
and biological monitors
Eto has better penetration capabilities than ...
ozone and hydrogen peroxide gas plasma
Eto is a..
cellulose-containing packaging materials are not compatible with...
hydrogen peroxide gas plasma sterilization
info about a device's compatibility with a specific sterilization process should be obtained from the...
_____ is required cycle parameter for ozone and ethylene oxide sterilization.
high temp (thermal) sterilization
the sterilization process of choice in healthcare facilities, and is achieved by subjecting items being processed to thermal energy from moist heat (steam) or dry heat
important factors for sterilization: (4)
type of microorganisms present
number of microorganisms (bioburden)
the amount and type of soil present
the amount of protection the medical device provides
advantages of steam sterilization:
sterilization cycles are fast
it is relatively simple tech
it leaves no chemical residues or by-products behind
weakest part of a steam sterilizer
the chamber drain..
is located at the front or center of the floor of most types of steam sterilizers and must be cleaned at least daily
the printout from a steam sterilization cycle contains the following info:
date and time the cycle began
selected cycle parameters and activities such as type of cycle, sterilization temp., and dry times
a written record of actual cycle activities
table top sterilizers
thermally-operated valve closes which causes the steam to build-up pressure until the operating temp (normally 121 degrees C [250 degrees F] is reached)
gravity air displacement sterilizer
type of steam sterilizer
hot air is introduced which rises to the top forcing cooler air to the bottom of the chamber and out the drain, while dynamic air removal units eliminate air during the preconditioning phase with pressure and vacuum pulses
gravity air displacement sterilizers can be used to..
dynamic air removal sterilizers
a vacuum pump or water ejector removes the air during the preconditioning phase prior to reaching the exposure temp.
dynamic air removal sterilizers usually operate at ...
higher temp than gravity sterilizers
270-275 degrees F
to assure the acutal removal of air in these sterilizers, the integrity of the sterilizers should be checked by processing a ...
or daily air removal test (DART)
flash sterilizers ..
are often found in operating rooms or surgical suite substerile rooms
(labor and delivery and special procedures areas that perform invasive procedures)
their intended use is for the emergency sterilization of instruments when there is not time for terminal sterilization
instrument washer sterilizers...
may be found in the central service decontamination area, adjacent to operating rooms, or in clinics and surgery centers
~ type of heat transfer
transmission of heat from one part to another part of a material
sterilization method: dry heat
convection (liquids and gases)
~ type of heat transfer
transfer of heat from one point
sterilization method: Steam
~ type of heat transfer
transfer of heat from one object to another without warming the space between the objects
Sterilization method: radiation (not used in hospitals)
Ex: from the sun to the earth
flash sterilization involves ...
sterilizing an item that is not packaged
"terminal sterilization" refers to...
sterilizing an item that is packaged
saturated steam steriliation cycle has 4 phases
conditioning (steam sterilizer)
steam enters at the upper back portion of the sterilizer, and strikes a baffle plate to preventthe steam from directly hitting the load.
as steam enters, air is displaced through the drain
exposure (steam sterilizer)
the pressure begins to rise as does the steam temperature.
after the desired temp is reached, the sterilizer's control system begins timing the cycle's exposure phase
the chamber's drain is opened, and the steam is removed through the discharge line
drying begins at the conclustion of exhaust phase if packaged items are in the load
conditions necessary for an effective steam sterilization process:
2 most commonly encountered temps for steam sterilization are
250- gravity 15 psi
270- prevac 27 psi
is mandatory for effective steam sterilization
is like a fog because it holds many tiny water droplets in suspension