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RUSVM Surgery LAB > Aspesis > Flashcards

Flashcards in Aspesis Deck (30):
1

What is the difference between asepsis and antisepsis?

Asepsis— prevent/minimize wound contamination by destroying organisms before they enter the wound

Antisepsis - killing of bacteria father they have entered the wound

2

Difference between disinfection and sterilization?

Disinfection — use of germicidal substances to kill most microorganisms

Sterilization — process of destroying all microorganisms (bacterial, fungal, and spores)

3

How do you prepare a patient for surgery?

+/- bath 24hours pre-op
Clip hair
Vacuum loose hair
Primary (rough) scrub to remove dirt and debris

4

How do you sterile prep the surgical site ?

Scrub technique must prevent contamination of prep material

Germicidal soap scrub
Circular motion from the site to periphery
Scrub GENTLY
5 minute contact time
Final prep solution

5

What is the primary source of bacteria during surgery?

YOU

More people + more activity = more bacteria

6

4% chlorhexidine and 15% povidone iodine both proved 70-80% bacterial reduction. In with which solution does regrowth occur more rapidly?

Povidone iodine

7

How much contact time do you require when you scrub?

3-5mins

8

T/F: open gloving is preferred to closed gloving because there is much less risk of breaking aseptic technique

False

Closed gloving is preferred

9

Anyone scrubbed should keep their hands between the level of _________________________ to maintain sterile technquie

Waist and axillae

10

When placing quarter drapes, ideally the surgeon should stay a minimum of _____ “ form the edges of the operating table

12

11

T/F: the top drape should cover the entire instrument table

True

12

This this a break is aseptic technique or a beak in asepsis?

Raising your ands above shoulders

Break in aseptic technique

13

This this a break is aseptic technique or a beak in asepsis?

Raising your hand and touching your mask

Break in asepsis

14

What are the physical sterilization methods?

Thermal energy
Filtration - liquids (eg millipore filter)
Radiation
-gamma radiation

15

What are the chemical sterilization methods?

Plasma
Ethylene oxide
Disinfectants

16

What is the most common method of sterilization?

Steam (autoclaving)
-saturated steam heat under pressure

Destruction/desaturation of cellular proteins

17

What are disadvantages of steam sterilization?

Cannot be used for some materials
Dulls sharp instruments
Cycling time

Pack size limitations

18

How does a gas plasma sterilization work?

Peracetic acid vapor phase
Plasma phase
- ionized or partially ionized gas
-produced by passing electromagnetic energy through a mixture of stable gases

Fast turn around

19

Why must you aerate materials sterilized by ethylene oxide?

Irritant
Carcinogen/teratogen

Should be aerated for 8-12hours

20

What is the use of “cold” disinfectants ? What are the products used?

Wash and disinfect surfaces, not suitable for surgical instruments

Chlorhexidine, iodophors

Glutaraldehyde (scopes)

21

When preparing a pack for sterilization, the pack should not be more than ____” thick

12

22

What is the shelf life of a heat sealed paper/transparent plastic pouch pack?

1 year

23

What is the shelf life of 2layer pack with nonwoven polypropylene fabric?

8 weeks

24

What is the shelf life of a 2 layer cloth pack?

4 weeks

25

T/F: wound lavage reduces risk of infection by removing bacteria and lose tissue fragments from the wound

True

26

T/F: you should try to make your incision as small as possible to prevent bacterial contamination of the site

False

Give ample length to the incision to prevent tissue trauma

27

What is intermediate delayed hemorrhage?

Within 24hrs of surgery

28

What is secondary delayed hemorrhage ?

More than 24hours after surgery — usually result of ineffective ligation

29

What are the consequences of hemorrhage ?

Obscures surgical field (technical errors)

Increase rate of infection

Hematoma formation — painful and interferes with normal wound healing

May be life threatening

30

How should you deal with hemorrhage during surgery?

Stay calm

More bleeding can be controlled by applying pressure while deciding how to manage

- hemostatic forceps (crush vessel and stimulate clot formation
- topical hemosatic agents — scaffold to promote clot formation
Gelfoam/surgical/hemablock

Ligature/electrocoagulation/vascular clips/primary vascular repair