Chapter 15 (Notes) Flashcards

1
Q

The basic EtO sterilization cycle consists of five stage:

A
  1. ) Preconditioning
  2. ) Humidification
  3. ) Gas
  4. ) Introduction
  5. ) Exposure,
  6. ) Evacuation
  7. ) Air washes
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2
Q

The basic EtO sterilization cycle takes approximately

A

2.5 hours

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3
Q

Minimum general recommendations for aeration time

A

8 hours

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4
Q

Minimum general recommendations for aeration temperature (8hrs)

A

140F (60C)

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5
Q

Hydrogen peroxide gas plasma using a hydrogen peroxide solution ranging from

A

59% to 95%

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6
Q

The phases of hydrogen peroxide gas plasma include:

A
  1. ) Vacuum - The load is heated while the vacuum system removes any remaining water as it evaporates. Air is removed from the chamber and packages until the pressure is reduced to below atmospheric pressure.
  2. ) Injection - Once the correct pressure has reached, a premeasured amount of concentrated hydrogen peroxide is pumped from a cassette into the vaporizer bowl and then vaporized into the chamber.
  3. ) Diffusion - The diffusion stage drives hydrogen peroxide vapor into a small cervices and lumens of devices. The chamber returns to atmospheric pressure to accomplish this.
  4. ) Plasma - A vacuum decreases the pressure, and radio frequency (RF) energy is radiated within the chamber from an electrode screen. The RF energy ionizes the hydrogen peroxide, creating hydrogen peroxide gas plasma. The injection and plasma phases are repeated a second time.
  5. ) Vent - At the end of the second plasma sequence, the RF is turned off. Air is then vented into the chamber through bacterial high-efficiency particular air (HEPA) filters, returning it to atmospheric pressure. The process byproducts are only water vapor and oxygen. Aeration is not required, and instruments can be used immediately following the 24- to 75-minute sterilization cycle
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7
Q

The hydrogen peroxide cassette is automatically ejected into a collection box for safe disposal after

A

5 cycles

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8
Q

Hydrogen peroxide gas plasma is not compatible with:

A
  1. ) Liquids and powders
  2. ) Any material that absorbs liquids.
  3. ) Items that contain cellulose, such as cotton, paper or cardboard, linens, huck towels,gauze sponges or any item containing wood pulp
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9
Q

AORN guidlines recommend that biological monitoring should be performed at least

A

Daily (Preferably with each load)

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10
Q

Vaporized hydrogen peroxide sterilization uses a

A

59% hydrogen peroxide solution

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11
Q

Vaporized hydrogen peroxide is injected ______ times during each sterilization cycle

A

4

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12
Q

Vaporized Hydrogen Peroxide Cycle Temperature:

A

Less than 122F (50C)

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13
Q

Ozone sterilization cycle time is

A

4.5 hrs

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14
Q

Ozone Sterilization cycle temperature:

A

87.4F to 97F (30.8 to 36C)

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15
Q

Ozone Sterilization Relative Humidity

A

85% to 100%

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16
Q

Who regulates Ozone as a toxic gas?

A
  1. ) OSHA
  2. ) FDA
  3. ) NIOSH
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17
Q

Ozone sterilization requires a well ventilated room with ________

A

10 air exchanges per hour

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18
Q

_____ is the byproduct of Ozone sterilization

A

Oxygen

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19
Q

The ________ method of low temperature sterilization uses gas cartridges for sterilant

A

Ethylene Oxide

20
Q

The probability of a viable microorganism being present on an item after sterilization is the _________

A

Sterility Assurance Level

21
Q

The bacterial spore used to test ethylene oxide sterilization cycles is ______

A

Bacillus Atrophaeus

22
Q

Cycle time for items sterilized using ozone sterilization is _____

A

4.5 hours

23
Q

An aeration time of ______ at 140F is recommended for items sterilized with ethylene oxide.

A

2.5 hours

24
Q

_________ is a bacterial spore used to test hydrogen peroxide sterilization cycles.

A

Geobacillus Stearothermophilus

25
Q

Exposure time for items sterilized using ethylene oxide sterilization is ______

A

8 hours

26
Q

_______ sets exposure standards for chemical sterilants

A

OSHA

27
Q

________ recommends that sterilants be rigorously tested before being marketed.

A

FDA

28
Q

_______ is a byproduct of Ozone sterilization

A

Oxygen

29
Q

The _______ method of low-temperature sterilization uses gas cartridges for a sterilant

A

Ethylene Oxide

30
Q

The probability of a viable microorganism being present on an item after sterilization is the

A

Sterility assurance level

31
Q

The bacterial spore used to test ethylene oxide sterilization cycles is

A

Bacillus atrophaeus

32
Q

Cycle time for items sterilized using ozone sterilization is

A

4.5 hrs

33
Q

An aeration time of ____ at 140F is recommended for items sterilized with ethylene

A

2.5 hrs

34
Q

________ is a bacterial spore used to test hydrogen peroxide sterilization cycles

A

Geo stearlthermophilos

35
Q

Exposure time for items sterilized using ethylene oxide sterilization is ____

A

Eight hours

36
Q

____________ sets exposure standards for chemical sterilants

A

OSHA

37
Q

______ recommends that sterilant be rigorously tested before being marked

A

U.S. Food and Drug Administration

38
Q

_______ is a method of stock rotation which ensures that older items are used first

A

First in, first out

39
Q

Air flow in the sterile storage area should be

A

Positive

40
Q

Packaging that prevents microorganisms from entering the packages and allows aseptic opening is called

A

Barrier packaging

41
Q

Humidity in the sterile storage area should be ___

A

Less than 70%

42
Q

Temperature in the sterile storage area should be ____

A

75 or lower

43
Q

The _____ shelf of storage carts should solid

A

Bottom

44
Q

Stacking rigid containers too high can cause ______ damage

A

Gasket

45
Q

Items should be stored at least _______ inches below sprinkler heads

A

18