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Flashcards in Aseptic technique Deck (66)
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1

Asepsis (definition)

absence of microbes

2

Sterile (definition)

absence of living microorganisms (inanimate objects)

3

Surgically clean (definition)

destruction of all accessible microorganisms on the surface (living organisms=our patients)

4

contaminated (definition)

a surface or structure where microorganisms are present

5

What is considered a surgical site infection? (SSI)

infection from a surgical incision within 30 days of surgery

6

What is considered a surgical site infection if an implant was used?

1 year

7

What is the most common hospital acquired infection?

surgical infections

8

What are the possible consequences of surgical infections?

1. cost
2. morbidity
3. mortality--euthaniasia from cost

9

What can be sources of microbes for surgical site infection?

1. environment
2. patient
3. surgeon
4. surgical site--traumatic wound

10

What can be sources of microbes for surgical site infection?

1. environment
2. patient
3. surgeon
4. surgical site--traumatic wound

11

What are three ways to design the operating room to reduce infection risk?

1. clean, mixed and contaminated areas
2. designed OR for contaminated vs clean procedures
3. positive airflow--air flows from OR to corridors

12

What is the operating room cleaning protocol?

1. clean after each procedure and at start and end of the day
2. walls and tables easy to clean

13

Why should you limit traffic and personnel in the OR?

because +1 person =30% more infections

14

What are 5 methods of sterilization?

1. steam sterilization
2. gas (ethylene oxide)
3. plasma (H2O2) sterilization
4.

15

What are 5 methods of sterilization?

1. steam sterilization
2. gas (ethylene oxide)
3. plasma (H2O2) sterilization
4. ionizing radiation
5. cold chemical

16

How does steam sterilization work?

1. autoclave
2. steam under pressure 121 degrees for 15-30 minutes
3. coagulates proteins

17

What does steam sterilization (autoclave)

1. cleans instruments
2. correct packing, wrapping
3. proper positioning in unit

18

How does gas (ethylene oxide) sterilization work?

1. kills microbes by alkylation

19

How does gas (ethylene oxide) sterilization work?

1. kills microbes by alkylation of proteins

20

What is gas sterilization used for?

heat and moisture sensitive equipment

21

What are disadvantages of gas sterilization?

1. flammable, explosive gas
2. very toxic to personnel if exposed
3. long sterilization cycle
4. needs aeration before use

22

How does cold sterilization work?

1. glutaraldehyde used
2. submerge for 10-12 hours

23

What is cold chemical sterilization used for?

equipment sensitive to heat that can be submerged

24

Why must equipment that is cold sterilized be rinsed well?

it is irritating

25

What are disadvantages of cold chemical sterilization?

1. takes a long time
2. adverse health effects (resp, dermal)
3. do NOT use for any major procedure. will get infection. avoid if can

26

How do we know sterilization worked?

1. CLEAN instruments
2. chemical indicators BOT autoclave tape AND indicator strips
3. biological indicators: nonpathogenic spores (bacillus)--no growth

27

What are 6 general patient factors that influence surgery site infection

1. disease status (ASA classification)
2. nutritional status
3. age, gender? (male>female)
4. distant infection
5. very dirty-->bath and allow to dry
6. duration of hospitalization

28

What are 6 general patient factors that influence surgery site infection

1. disease status (ASA classification)
2. nutritional status
3. age, gender? (male>female)
4. distant infection
5. very dirty-->bath and allow to dry
6. duration of hospitalization

29

What are anesthesia patient factors that affect surgical site infection?

1. ASA classification
2. hypotension (perfusion)
3. peri-operative hypothermia (pefusion)
4. anesthetic drugs--older; propofol--lipid substrate--contaminated
5. total anesthesia time--immune function compromized

30

How much does risk of infection go up every hour the animal is under anesthesia

30%