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I & M > Electrical, Laser, Radiation, and Fire Safety > Flashcards

Electrical, Laser, Radiation, and Fire Safety Flashcards

1
Q

Who is the Electrical safety cartoon?

A

Reddy Kilowatt

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2
Q

An open circuit is what?

A

A circuit in which no path is available for the current to return to the battery

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3
Q

What are the electrical hazards for patients?

A

Burns, Microshock, Macroshock

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4
Q

Burns may be associated with what?

A

Pressure ischemia

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5
Q

True or false: macroshocks can only be detected on a conscious patient

A

True

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6
Q

Which are more difficult to detect, micro shock or macro shock?

A

Microshock

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7
Q

Ventricular fibrillation occurs in 5% of patients at what milliampere?

A

100 ug

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8
Q

An awareness of or a reflex response to a passage of electric current through the body is known as what?

A

Electric shock

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9
Q

What makes electrical currents passing through the body so dangerous?

A

The currents interfere with signals produced by body

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10
Q

What is the worst frequency that that can pass through the human body?

A

50 - 60 Hz

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11
Q

What are the two parts of the human body that you do not want a current to go through?

A

The heart and the brain

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12
Q

The heating effect from electrical burns comes from what kind of heating?

A

Joule heating

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13
Q

For a constant current density, burns will result from what size area of contact?

A

Large areas of contact equate to no burns

Small areas of contact equate to Burns

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14
Q

Temperatures above what degrees Celsius may cause skin injury?

A

45*C

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15
Q

What does a GFCI outlet stand for?

A

Ground fault circuit interference

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16
Q

What class electrical wires is grounded?

A

Class 1

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17
Q

What class of electrical wires is double insulated?

A

Class II

That is they have 2 walls of insulation

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18
Q

Class III type of electrical wires contain what?

A

Internal power source

Ie. transport monitors

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19
Q

Shock is known as what?

A

An awareness or reflex response to a stimulus

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20
Q

A risk of micro shock can come from what?

A

An indwelling catheter

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21
Q

What are some types of indwelling catheters?

A

Pulmonary artery catheter

Central line

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22
Q

What are some examples of safety power systems?

A

Isolation transformers
line isolation monitors (LIM)
ground fault circuit interrupters (GFCI)

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23
Q

How do line isolation monitors work?

A

When a faulty piece of equipment is plugged into the isolated power system, it will markedly decrease the impedance from line 1 or line 2 to the ground. This will be detected by the LIM which will sound an alarm

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24
Q

How do isolation transformers work?

A

They isolate the power from the ground

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25
Q

What does laser mean?

A

Light amplification stimulated emitted mediated radiation

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26
Q

When measuring radiation, the amount of radiation being given off or emitted is measured by what?

A

Curie (Ci)

Becquerel (Bq)

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27
Q

When measuring radiation what does the rad or the gray (Gy) unit measure?

A

The radiation dose absorbed by person,

that is the amount of energy deposited in human tissue by radiation

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28
Q

The biological risk of exposure to radiation is measured by what?

A

Rem

Sievert (Sv)

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29
Q

True or false, the beta particle that is emitted is also the electron

A

True

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30
Q

What are two types of radiation counters?

A

The Geiger-Muller counter

the scintillation counter

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31
Q

Radiation follows what law?

A

The inverse square law

E € d^-2

32
Q

True or false if the radioactive substances within the body of the patient, all or part of this energy must be absorbed by the tissues

33
Q

True or false, the energy of the alpha and beta particles absorbed in the surrounding tissues do not cause damage

34
Q

True or false, in the case of gamma rays a proportion of the radiation escapes from the body

35
Q

Actively dividing cells such as tumor cells are particularly vulnerable for what?

A

Any alpha or beta particles or radiation that caused damage or death to cells

36
Q

ALARA means what

A

As low as reasonably achievable

37
Q

What are some common types of lasers?

A

Gaseous lasing medium
solid lasing median
liquid dyes or semi conductors

38
Q

Most medical lasers including CO2 and KTP lasers are what type of class?

39
Q

What is the American national standards Institute for laser and laser hazards class 4 description?

A

Hazardous if viewed directly or from diffuse reflection. these lasers also produce fire hazards and skin hazards

40
Q

Which lasers are most often used for surgery?

A

Excimer
CO2
Nd: YAG

41
Q

What are some common laser hazards?

A

Laser plume
perforation of a vessel or structure
embolism
inappropriate energy transfer

42
Q

What hazards do laser plume present?

A

Atmospheric contamination
Vector for viral infection bacterial spores
Produces particulate matter 0.3 µ that is efficiently transported into the alveoli
Mutagenic and teratogenic

43
Q

What is an inappropriate energy transfer laser hazards?

A

Ignition of surgical drapes

44
Q

When using lasers In the OR, what should you do to your Fi 02?

A

Keep as low as possible perhaps less than 0.3

45
Q

What are the steps to do in case of a laser fire in the airway?

A
  1. Disconnect oxygen source at y piece and remove burning objects from the airway
  2. Irrigate site with water fire is still smoldering
  3. Ventilate the patient by mask or reintubate the trachea and ventilate with as low FI O2 as possible
46
Q

What type of lens will work for CO2 lasers?

A

Plastic or glass lens

47
Q

What is the bare minimum eye protection for the patient when using lasers near the face?

A

Tape the patient’s eyes and cover with saline soaked knit or metal shield

48
Q

What color Eye filter must be used for the argon and krypton lasers?

A

Amber / orange filter

49
Q

What type of laser requires the green filter for eyewear?

50
Q

What kind of lasers requires a red filter for eyewear?

A

KTP:Nd:YAG

51
Q

What is the Firedog for fire safety’s name?

52
Q

What three things must be present to have a fire?

Name examples of each:

A

An oxidizer: oxygen
ignition source: heat
fuel: sheets

53
Q

A tincture of something means what

A

It is dissolved in alcohol

54
Q

What are some combustible substances in the OR?

A 
Endotracheal tubes
 Tape
Plastic tubing
Hair
Gauze
Surgical drapes
Gastro intestinal gases
Alcohol and acetone
Tincture of benzoin and oils
55
Q

What are some of the combustible gases in anesthesia?

A 
Ethers 
halothane
isoflurane
Enflurane
(Lowest limits needed for combustion of each are found only inside the bottle)
56
Q

What are some of the combustion supporting gases?

A

Oxygen
nitrous oxide
air

57
Q

Is oxygen flammable?

A

It is nonflammable, but feeds and oxidizes everything else to the flame

58
Q

Why is N2O such a combustion supporting gas?

A

Releases the O2 molecule very readily thus providing the oxidizer the fire needs

59
Q

What are some combustion squelching gases?

A

Nitrous
carbon dioxide
helium

60
Q

Why is carbon dioxide a squelching gas when it has an O2 molecule available?

A

The CO2 molecule does not release the O2 molecule very well

61
Q

What are some ignition sources used in anesthesia or in the operating room?

A

Lasers
Hot filaments : bairhugger\fluid warmer\Drager flow reading on anesthesia machine
sparks and arcs : bovie
gas compression

62
Q

Conditions of a fire are what Compared to an explosion?

A

1 bar of pressure
Temperature between 200 and 500°C
Burns very slowly

63
Q

Conditions of an explosion compared to fire are what?

A

25 bar of pressure
Temperature around 3000°C
Flame front is faster than speed of sound

64
Q

What is the role of Arrhenius?

A

The rate of a reaction is doubled when the temperature of the initial mixture is raised by 10°C

65
Q

In layman’s terms describe the rule of Arrhenius.

A

It is more likely for fire to occur around something hot

66
Q

True or false 70% of surgical fires in the operating room are in the patient’s airway

A

False, only 21% of fires are actually in the airway

67
Q

True or false around 50% of surgical fires in the operating room are located on the patient’s head neck or upper chest

68
Q

What are some of the early warning signs of a fire?

A

A pop, a flash, or smoke

69
Q

What was Biggs number one risk management objectives if you are at fault for causing a fire

A

Destroy and mess up the scene of the crime as much as possible, throw away all damaging/incriminating evidence

(This is obviously a joke)

70
Q

What is the type of fire extinguisher that most hospitals have in the operating room’s

A

An a, B, C fire extinguisher that contains pressurized water

71
Q

What type of class fire are those that are fueled by materials that when they burn they leave a residue in the form of ash

72
Q

What is classified as a class B fire?

A

They involve flammable liquids and gases such as gasoline propane and paint thinner

73
Q

Class C fires involve what?

A

They involve energized electrical wiring or equipment

74
Q

What type of fires will we never see in the operating room and are most often caused by things such as phosphorus

75
Q

I recommend highly looking at the prevention and management of operating fires list

A

Biggs had it on about 4 slides so look at each one of them

I & M (37 decks)

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