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BDS3 Instrument decontamination > Past Exam Questions > Flashcards

Past Exam Questions Flashcards

1
Q

What PPE must be worn when carrying out manual washing of used instruments?

A

Face visor - protects from splashes and contamination into face and eyes

Gloves - Protects against infectious substances adhering to hands

Apron - Protects ourselves from splashes and contamination

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2
Q

Two methods used for manual cleaning of instruments and give example of instrument?

A

Washer disinfector - dental mirror
Ultrasonic cleaning - forceps

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3
Q

How often should ultrasonic cleaner be de-gassed?

A
  • When first starting up and/or before every clean
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4
Q

What is removed by de-gassing?

A
  • Air/oxygen removed from water
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5
Q

Why is de-gassing important?

A
  • Ultrasonic cleaning may be less efficient
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6
Q

Why should dental handpieces not be placed in ultrasonic cleaner?

A
  • Ultrasonic damage the high-speed turbine
  • Steam cannot fully penetrate lumen of handpiece
  • Type - S should be used instead
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7
Q

Why is it important to use de-mineralised water in steriliser?

A
  • May be bacterial and fungal presence in tap water
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8
Q

What are the two types of manual washing?

A
  • Immersion
  • Non-immersion
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9
Q

What is the ideal instrument for manual washing?

A
  • Stiff bristled, long handled brush
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10
Q

When using ultrasonic cleaner what should be done?

A
  • Chamber filled with water and detergent and standard production cycle run with machine empty
  • This effectively degasses it
  • Naturally occuring air bubbles within water which prevents the efficiency of machine and impacts how cleaning effectiveness of machine
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11
Q

What is the definition of sterile?

A
  • Probability of a viable microorganism being on the device less than 1X10^-6
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12
Q

Five things you can do to minimise healthcare asociated infections?

A
  • PPE gloves, aprons, visors, face masks
  • Aseptic technique
  • Properly sterilised equipment
  • Proper hand hygiene
  • Operator competence
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13
Q

List the 10 SCIPs that should be followed in healthcare?

A
  • Patient placement (assessment for infection risk)
  • Hand hygiene
  • Respiratory and cough etiquette
  • PPE
  • Safe management of care environment
  • Safe management of care Linen
  • Safe management of care equipment
  • Safe management of blood and bodily fluids spillages
  • Safe disposal of waste including sharps
  • Occupational safety - prevention and exposure management inc sharps
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14
Q

List two agents that can be used for cleaning up blood psillages?

A
  • Sodium hypochlorite
  • Sodium dichloroisocyanurate
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15
Q

What strength of agent should you use and how long for for blood spillages?

A
  • 10,000ppm chlorine solution for 3-5mins
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16
Q

How is the chain of infection broken when dealing wqiht dirty extraction forceps?

A
  • Chain is broken at reservoir
  • By cleaning, disinfecting and sterilising prior to use
17
Q

List the steps you would take when cleaning a blood spillage?

A
  • Wear PPE gloves apron vispr/goggles, face mask
  • Contain with paper towel
  • Assemble all equipment needed (spillage kit)
  • Sprinkle chlorine releasing granules
  • Clear affected area with paper towels and dispose of as clinical waste
  • Wash area with water and detergent then dry
  • Make sure any sharps are disposed of and dispose of single use items
  • Perform hand hygiene
18
Q

What are the 5 stages in correct order of the washer-disinfector cycle and describe the function/purpose of each stage?

A
  • Flush/prewash - saturates contamination and removes gross contamination
  • Main wash - supplemented with detergent to more effectively remove biologicals
  • Rinse - Removes biological/chemical residue
  • Thermal disinfection - Actively kills micro-organisms with heated water
  • Drying - hot air to remove moisture SUMP from surface of instruments
19
Q

What is the standard temperature banding for steam sterilisation?

A
  • 134-137°
20
Q

If chemical residue was being removed from the instrument what stage would the washer disinfector be at?

A
  • Rinse
21
Q

The temperature at the prewash stage of WD should be <35. The chemicals are added during the wash stage. Manufacturers instructions for use should be followed for doing. The drying stage removes any residual moisture after disinfection.

A
22
Q

What is the first stage of vacuum capable Type-B steriliser?

A
  • Air removal
23
Q

What chemical would you use within an Ultrasonic bath?

A
  • Enzymatic
24
Q

A Bowie dick is carried out on a daily basis what is it testing for?

A
  • Steam penetration
25
Q

What is the standard disinfection temperature banding within our WD?

A
  • 90-95°
26
Q

What are the principles of waste disposal?

A
27
Q

How to keep an amalgam container safe?

A

BDS3 Instrument decontamination (2 decks)

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