Lecture 11 - Sterilization, Disinfection, Antisepsis Flashcards Preview

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Flashcards in Lecture 11 - Sterilization, Disinfection, Antisepsis Deck (42):
1

What are the 4 routes of transmission during dental treatment?

direct contact
indirect transmission
spatter
aerosolization

2

How does indirect transmission work?

via a contaminated intermediate object

3

T/F standard infection control practices are not effective against HIV

F - they are highly effective

4

Which virus has many documented cases of transmission from and to health care workers?

hepatitis B

5

this disease has low risk of transmission during dental procedures

tuberculosis

6

T/F
tuberculosis is transmitted by surface contamination

F - not transmitted

7

Which types of herpes are present in oral cavity?

herpes simplex I and II

8

________ items come into contact with tissue or vascular system (surgical instruments)

critical

9

___________ items come into contact with mucous membranes or non-intact skin (curing light)

semi-critical

10

__________ items touch intact skin (blood pressure cuff)

noncritical

11

destruction or removal of all forms of life including spores

sterilization

12

T/F
sterilization is used on only inanimate objects
disinfectants are used on only inanimate objects

T
T

13

inhibition or destruction of pathogens (spores not being killed)

disinfectants

14

what are formulated to destroy pathogenic microorganisms on living tissues, and are safe to use on human tissues (soap)?

antiseptics

15

T/F
antiseptics and disinfectants cannot be used interchangeably

T

16

this level disinfection destroys all microorganisms with the exception of bacterial spores

high level disinfection

17

this level disinfection inactivates mycobacterium tuberculosis, vegetative bacteria, most viruses and most fungi but it does not necessarily kills bacterial spores

intermediate level disinfection

18

this level disinfection kills most bacteria, some viruses and some fungi but cannot be relied on to kill resistant microorganisms like mycobacterium tuberculosis or bacterial spores

low level disinfection

19

What is required of critical items? semicritical items? noncritical items?

critical items must be sterilized
semicritical items must have high or intermediate level disinfection
noncritical items need a low level disinfectant

20

what is the most commonly used method of steam sterilization?

autoclave

21

which type of steam sterilization is used on dental coach?

flash steam sterilization

22

T/F
higher temperatures for longer time are required for dry heat sterilization
heat transfer is fast enough that any packages can be sterilized

T
F - heat transfer is slow and packages need to be small

23

T/F dry heat sterilization is fine for handpieces
rapid heat transfer sterilization is fine for handpieces

F
F

24

T/F
penetration for steam sterilization is better than unsaturated chemical vapor sterilization
items must be loosely packed and dry for chemiclave

T
T

25

T/F
chemical monitoring shows only that package has been processed through heat cycle
chemical monitoring ensures adequacy of sterilization cycle

T
F - does not ensure adequacy

26

what indicators provide the best guarantee of sterilization?

biological (biological monitoring)

27

T/F you can use chemical sterilant in place of heat

F

28

what are effective against vegetative bacteria like m. tuberculosis, fungi, viruses and spores

glutaraldehydes

29

quaternary ammonium solutions provide intermediate level surface disinfection for which kind of items?

Semicritical

30

phenols and derivatives are what level of disinfection?

intermediate

31

what percentage of alcohol is ideal?

70%

32

alcohols are effective against which common staph infection?

MRSA

33

detergents provide ________________ and disrupt _____________

mechanical cleansing
cell membranes

34

are detergents good disinfectants?

no

35

T/F
iodine and iodophors are a good handwashing antiseptic
they are good surface low-level disinfectant.

T
F - intermediate-level

36

To prevent backflow from suction devices
-----do not have patients seal lips around suction device
-----position suction device below level of tubing

T
F - do not position below level of tubing

37

what are the most efficacious agents for reducing the number of bacteria on the hands?

alcohol-based hand rub

38

what is recommended for visibly soiled hands?

soap and water

39

what is recommended for routine decontamination of hands for all clinical indications?

alcohol-based hand rub

40

when to wash hands with soap and water?

when they are visibly dirty or soiled with blood or other body fluids or after using the toilet

41

if exposed to potential spore-forming pathogens what is the preferred means?

hand washing with soap and water

42

what is the preferred means for routine hand antisepsis if hands are not visibly soiled?

alcohol-based handrub