Deck 20: Principles and Techniques of Disinfection

Question 1

Current infection control guidelines of the Organization for Safety and Asepsis Procedures (OSAP) consider instrument trays to be _____ surfaces.

A)touch
B)transfer
C)splash
D)droplet

Answer 1

transfer

Question 2

Precleaning can be accomplished by using:

A)a disinfectant that cleans as well as disinfects.
B)regular soap and water.
C)alcohol and gauze.
D)both a and b.

Answer 2

both a and b.

Question 3

If the surface below the barrier is inadvertently touched when removing a contaminated barrier,you:

A)do not have to clean and disinfect the surface.
B)will have to clean and disinfect that surface.
C)will have to clean and disinfect all treatment room surfaces.
D)should place a double layer of protective material.

Answer 3

will have to clean and disinfect that surface.

Question 4

The time for sterilization with an immersion disinfectant ranges from _____ hours to 30 hours.

A)2
B)6
C)12
D)24

Question 5

Surface barriers:

A)should be removed and discarded between patients following removal of gloves.
B)should be removed and discarded between patients while you are still gloved.
C)should be disinfected using the spray-wipe-spray technique.
D)eliminate the need to clean and disinfect surfaces at the beginning and end of each workday.

Question 6

Disinfectants used in dentistry must:

A)be registered with the Environmental Protection Agency (EPA).
B)be registered as hospital disinfectants with tuberculocidal claims.
C)kill all spores.
D)both a and b.

Question 7

Which environmental surfaces must be cleaned and decontaminated more rigorously than the others?

A)Housekeeping surfaces
B)Clinical contact surfaces
C)Floors and walls
D)Sinks

Question 8

The method to deal with surface contamination is:

A)using a surface barrier to prevent the surface from becoming contaminated.
B)precleaning and disinfecting the surface between patients.
C)wiping the surface with alcohol.
D)both a and b.

Question 9

The high-level disinfectant with very little odor that does not require activation or mixing is:

A)chlorine dioxide.
B)glutaraldehyde.
C)ortho-phthalaldehyde (OPA).
D)sodium hypochlorite.

Question 10

When a surface has been covered with a barrier,it:

A)does not need to be cleaned and disinfected.
B)should still be cleaned and disinfected at the beginning of the workday.
C)should still be cleaned and disinfected at the end of the workday.
D)should still be cleaned and disinfected at the beginning and end of each workday.

Question 11

Some microorganisms may survive on environmental surfaces for different amounts of time.________ is a concern to the dental profession since it can survive for weeks.

A)Herpes simplex
B)Tuberculosis
C)None of the above
D)Both a and b

Question 12

Precautions that should be followed when using glutaraldehyde include:

A)avoiding the fumes.
B)always rinsing instruments thoroughly before using them on patients.
C)wearing PPE to protect the eyes, skin, and lungs.
D)all of the above.

Question 13

Chemicals that destroy or inactivate most species of pathogenic microorganisms on inanimate surfaces are called:

A)disinfectants.
B)sterilants.
C)antiseptics.
D)both a and c.

Question 14

The purpose of precleaning a surface is to:

A)to reduce the number of microbes.
B)to remove blood, saliva, and other body fluids.
C)both a and b.
D)none of the above; precleaning is not necessary if you are disinfecting the surface.

Question 15

Recommendations regarding solutions of detergents or disinfectants include:

A)making a fresh cleaning solution only when the previous batch is completely used up.
B)making fresh cleaning solution each day and discarding any remaining solution.
C)cleaning surfaces with a mist or aerosol to provide maximal coverage.
D)preventing the container from drying, which causes brittleness.

Question 16

Which of the following may be used as a surface disinfectant in the dental office?

A)Iodophors
B)Ethyl alcohol
C)Isopropyl alcohol
D)Ammonia

Question 17

After a dental treatment,the safest approach for avoiding contamination is by assuming that the surface has been contaminated with:

A)saliva.
B)blood.
C)potentially infectious materials.
D)all of the above.

Question 18

Carpeting:

A)is as easy to clean as nonporous hard-surface flooring.
B)can be reliably disinfected.
C)harbors bacteria but not fungi.
D)harbors both bacteria and fungi.

Question 19

Housekeeping surfaces:

A)include floors and walls, but not sinks, because they are considered a clinical contact surface.
B)pose a risk for disease transmission in the dental healthcare setting.
C)must be cleaned with a high-level disinfectant/sterilant.
D)only need to be cleaned with a detergent or low-level disinfectant.

Question 20

To effectively clean and disinfect dental treatment rooms:

A)latex examination gloves should be used.
B)the surface should remain moist for the manufacturer's recommended time for fungicidal action, usually a minute.
C)the surface should remain moist for the manufacturer's recommended time for fungicidal action, usually 10 minutes.
D)the surface should remain moist for the manufacturer's recommended time for tuberculocidal action, usually 10 minutes.

Question 21

Some of the "cons" of complex phenols include that they:

A)are corrosive and cannot be reused.
B)must be used on hard surfaces only.
C)may degrade some plastics or leave etchings on glass.
D)leave chlorine smell on surfaces.

Question 22

Greener infection control does not include using:

A)traditional film-based radiography.
B)digital radiology.
C)only EPA-registered disinfectants.
D)products with recyclable packaging.

Question 23

The following surfaces should typically be protected with barriers,except:

A)head rest and control buttons on the chair.
B)light handles, light switches, and x-ray control switches.
C)light-curing device, drawer, and air-water syringe handles.
D)floors and walls in the treatment room.

Question 24

To understand the difference between disinfection and sterilization,we know that disinfection is:

A)intended to kill disease-causing microorganisms remaining on surfaces after pre-cleaning.
B)the process in which all microorganisms are destroyed.
C)accomplished by using water as a disinfectant.
D)both a and b.

Question 25

Instability,daily preparation,strong odor,and corrosion are some of the disadvantages of:

A)halogens.
B)iodophors.
C)complex phenols.
D)sodium hypochlorite.

Question 26

According to the EPA,synthetic phenol compounds are categorized as intermediate-level hospital disinfectants.Phenols can be used on:

A)metal.
B)glass.
C)rubber or plastic.
D)all of the above.

Question 27

Which of the following products is capable of killing spores in the dental office?

A)Sporicidals
B)Iodophors
C)Isopropyl alcohol
D)Ammonia

Question 28

Before using a chemical agent,it is important to carefully read the label,since it offers important information,such as:

A)directions for use.
B)precautionary statements for handling the product.
C)storage, disposal, and manufacturer's recommendations for use.
D)all of the above.

Question 29

To minimize surface contamination from splash,spatter,and surface droplets,the surface should be:

A)cleaned once a week and surface barriers should be used.
B)precleaned and disinfected between patients.
C)wiped with alcohol.
D)both a and b.

Question 30

Acceptable types of barriers include:

A)clear plastic wrap.
B)plastic bags.
C)tubing and plastic-backed paper.
D)all of the above.

Question 31

One of the "pros" of complex phenols is that:

A)many preparations are limited to one day of use.
B)they may leave a residual film on treated surfaces.
C)they are sporicidal.
D)they are compatible with metal, glass, rubber, and plastic.

Question 32

Under the CDC Guidelines for Infection Control in Dental Healthcare Settings-2003,housekeeping surfaces include:

A)floors.
B)walls.
C)sinks.
D)all of the above.

Question 33

The use of surface barriers on surfaces and equipment can prevent contamination of contact areas; to make this possible surface barriers should be:

A)removed and discarded between patients.
B)resistant to fluids.
C)disinfected using the spray-wipe-spray technique.
D) both a and b.

Question 34

A product capable of killing some viruses should be labeled:

A)fungicidal.
B)sporicidal.
C)tuberculocidal.
D)virucidal.

Question 35

The chemical disinfectant classified as an intermediate-level agent no longer recommended for use in dental offices is known as:

A)glutaraldehyde.
B)alcohol.
C)phenols.
D)sodium hypochlorite.

Question 36

Which item is not single-use-only?

A)Patient napkins
B)Plastic orthodontic brackets
C)Impression trays
D)Irrigating syringes

Question 37

Which agency regulates and registers disinfectants and chemical sterilants according to chemical classification?

A)OSHA
B)FDA
C)EPA
D)CDC

Question 38

_________ Blood-borne Pathogens Standards require that contaminated surfaces be disinfected between patients,even if no evidence of contamination is visible.

A)CDC
B)OSHA
C)FDA
D)None of the above