sterilisation and disinfection Flashcards Preview

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Flashcards in sterilisation and disinfection Deck (13):
1

Cleaning:

Removal of all foreign material from an object. (soil, organic material), water with detergents or enzymatic products (visible debris)

2

Antisepsis

Prevention of infection by inhibiting or arresting the growth and multiplication of germs. (lecture killing of possible organisms within a certain limit, i.e. not all but most) (i.e. practice an antiseptic practice in taking blood)

3

disinfection

A process which removes or kills most, but not all, viable (microorganisms (exception of bacterial endospores and fungal spores)

4

Pasteurisation:

A form of heat disinfection that eliminates pathogens and reduces the total number of viable organisms (form of disinfection)

5

Sterilisation:

The process of killing or removing all (micro)organisms (higher standard)

6

what has high resistance to sterilisation

clostridium bacillus

7

what has low resistance to sterilisation

influenza

8

what are the calssifcaiton of equiptment

- Critical: introduced directly into bloodstream or other sterile site sterilisation
- Semicritical: comes into contact with intact mucous membranes high level of chemical disinfection (vaginal speculae)
- Noncritical: comes into contact with the skin cleaning or low level disinfection

9

name some antiseptics

ethanol, iodine and chlorhexidine (disinfection of the skin)

10

what are the 2 methods of sterilisation

physical and chemical

11

name 4 physical emthods of sterilisation

Dry heat, moist heat, radiation, filtration

12

what are the 4 qualities fo autoclaves

steam quality, high pressure, temperature and time

13

what indicators can we use for autoclaves

- Autoclave tape Shows that the tape has been exposed to heat.
Biological indicators Contain spores of a heat-resistant bacterium - Bacillus stearothermophilus. If the autoclave reaches the right temperature, the spores with germinate and will change colour of the pH-sensitive chemicals. This is the mainstay for the testing.

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