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Basic Respiratory Therapy Procedures And Lab > BRTP 02 Oxygen systems > Flashcards

BRTP 02 Oxygen systems Flashcards

1
Q

Concentration of nitrogen in air

A

78%

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2
Q

Concentration of oxygen in air

A

20.9 or 21%

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3
Q

Concentration of argon in air

A

0.93%

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4
Q

Concentration of carbon dioxide in air

A

0.03%

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5
Q

What % of oxygen is required for respiration

A

21%

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6
Q

Psi

A

Force exerted by gases in pounds per square inch

All tanks measured in psi

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7
Q

Psia**

A

Force in pounds per square inch absolute which is exerted by atmosphere (14.7 psi)

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8
Q

Psig

A

Pounds per square inch gauge

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9
Q

Carbon dioxide

A

CO2

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10
Q

Carbon monoxide

A

CO

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11
Q

Helium

A

He

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12
Q

Nitrogen

A

N2

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13
Q

Nitrous oxide

A

N2O

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14
Q

Oxygen

A

O2

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15
Q

Nitric oxide

A

NO

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16
Q

Air

A

AIR

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17
Q

What cylinder gases support combustion (nonflammable)?

A 
Oxygen
Nitrous oxide
Air
Oxygen nitrogen mix
Oxygen carbon dioxide mix
Helium oxygen mix

(Anything with an “oxygen mix” will support combustion (nonflammable)

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18
Q

What cylinder gases are nonflammable gases (do not burn)?

A

Nitrogen
Carbon dioxide
Helium

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19
Q

Flammable gases (burn easily, potentially explosive)?

A

Carbon monoxide

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20
Q

CGA (compressed gas association)

A

OVERSEES MANUFACTURE keyword
storage and transport

Provides standards and SAFETY SYSTEMS for compressed gas systems

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21
Q

DOT (department of transportation)

A

Regulations for manufacturing storage and TRANSPORT of compressed gas

Filling, marking, and labeling

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22
Q

FDA (food and drug administration)

A

SETS PURITY STANDARDS

Monitors company compliance

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23
Q

NFPA (National fire protection agency)

A

Gas storage and delivery

Fire protection and safety INDUSTRY STANDARDS for safe manufacture, storage, and transport of gas

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24
Q

What color are oxygen tanks?

A

Steel: green

Aluminum tanks: green and silver

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25
Q

What is the make up of the air around us?

A

Nitrogen and oxygen

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26
Q

What is the purity requirement for medical oxygen?

A

99%

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27
Q

Which gas supports combustion?

A

Oxygen

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28
Q

Steel cylinders should be tested how often?

A

Every 10 years

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29
Q

How often should aluminum cylinders be tested?

A

5 years

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30
Q

Hydrostatic test of a cylinder

A

Consists of loading a water filled cylinder into a sealed chamber, which is also filled with water

The inside of the cylinder is then pressurized to five-thirds its working pressure with water. The water displace is measured.

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31
Q

Make sure hydrostatic test date is within

A

5 years for aluminum

10 years for steel

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32
Q

A plus sign (+) on a cylinder indicates

A

A plus sign (+) means test passed and that a cylinder is approved for filling to 10% above its service pressure

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33
Q

An asterisk (*) on a cylinder indicates

A

An * denote testing is good for 10 years

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34
Q

To be considered safe a tank

A

Must have a recent hydrostatic test date and tests mark

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35
Q

What is the critical temp for oxygen?

A

-118 degrees Celsius

It is kept in such a low temp to keep it in liquid form in order to store more.

Room temp oxygen is gas.

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36
Q

Liquid oxygen to gas conversion?

A

1 liter of liquid O2 is equal to 860 liters of gas

37
Q

What is the desired pressure working pressure (pressure throughout the hospital)?

A

50 psi

38
Q

Zoning

A

Segments of the piping system must have a zone valve (shut off valve)

Zone valves located on every floor, wing, and each surgery room, sometimes er room

(Important) Zone valves allow shut off to certain areas in the event of an emergency.

39
Q

Build liquid oxygen systems are made up of what 3 systems

A

Primary supply
Secondary supply
Reserve supply

40
Q

2 types of cylinder valves

A

Direct acting

Diaphragm

41
Q

3 types of gas outlet relief valve

A

Frangible
Fusible plug
Spring loaded devices

42
Q

Direct acting valve

A

One piece moved by threads

Withstands high pressure (greater than 1500 psi)

43
Q

Diaphragm valve

A

Threaded stem

Turning clockwise resets diaphragm and closes valve

Preferred when pressure is less than 1500 psi

44
Q

Frangible/rupture disks

A

Used in small cylinders

Thin metal disk buckles and gives way under excessive pressure

45
Q

Fusible plug

A

Small cylinders use an alloy plug designed to melt at a temp of 208-220 F

46
Q

Spring loaded device

A

Large cylinders use these

Designed to release excessive cylinder pressure and reseal

47
Q

Cylinder safety systems

A

Purpose to prevent use of wrong gas in patient

ASSS (American standard safety system) H-K tanks use this (largest tanks)

PISS (pin index safety system) 
E cylinders (small tanks use this)

DISS(diameter index safety systems)
All other threads (except for tanks) and walls uses these

Quick connect system

48
Q

ASSS

A

Remember large tanks use these

Remember nipple design

Nipple on a big ASSS tank

49
Q

Pin index safety system

A

PISS

Remember small tank

2 pin placement into holes in the post valve

50
Q

Pin index safety system numbers to remember

A

2 pin # for air is 1&5

2 pin # for oxygen is 2&5

51
Q

Diameter index safety system

A

important
Found at gas connection where pressure is 200 psi or less

“Hospital” wall outlets uses these

52
Q

Quick connect systems

A

Single quick connect systems are used throughout each hospital

This is a variation of DISS connection, used to connect wall station outlets

Quick connect used in melodys lab

53
Q

Safety system used on low pressures less than 200 psi?

A

DISS

54
Q

What is the purpose of a pressure relief valve on cylinder valve stem?

A

Relieve pressure when pressure is too high due to heat

55
Q

Duration of cylinder equation

A

Duration =
(cylinder pressure x cylinder factor)
/flow rate of gas

If needs in hours divide by 60

56
Q

Factor per cylinder size

A

D. 0.16

E. 0.28

G. 2.41

H to K. 3.14

57
Q

Duration formula again

A

Pressure X factor

/flow

58
Q

Reducing valves

A

Decrease cylinder pressure to a set value

Can be present or adjustable

59
Q

Flowmeter

A

Sets the RATE of gas flow to patients in liters per min

60
Q

Regulator

A

Reducing valves and a flowmeter in one device

61
Q

More on reducing valves

A

Preset reducing valve is usually 50 psi

Adjustable reducing valve is usually between 0 to 100 psi

Single stage. Reduces working pressure to 50 psi in one step

Multistage has more than 1 level of pressure reducing valve system and working pressure (just remember these are on H tanks)

62
Q

E tanks are used

A

To power devices

63
Q

Regulators

A

Regulate both gas pressure and flow

Reducing valve- used for reduction in gas pressure

Flowmeter- used for control of gas flow to a patient

64
Q

Flowmeters allow us to do what for a patient

A

Give a specific amount of gas to a patient

65
Q

3 types of Flowmeter

A

Thorpe (most common)

Bourdon gauge

Flow restrictor

*Flowmeters must be attached to a pressure reducing valve or bedside wall gas outlet (50 psi source)

66
Q

Bourdon gauge

A

Measure PRESSURE

Reads flow on scale

Not affected by gravity (can lay flat)

Will register flow even when blocked

If occluded it will measure higher than what is actually coming out

67
Q

Thorpe tube

A

(Truly measure flow)

Hollow tapered tube with ball (or float) inside

Pressure caused by flow of gas moves ball up

Is affected by gravity

68
Q

2 types of Thorpe tubes

A

Compensated (preferred instrument to regulate flow in most patient situations)

Uncompensated

69
Q

3 ways to tell if Thorpe tube is compensated

A

It’s labeled compensated

With gas in and thumb obstructing flow of gas outlet, the float falls to 0

With needle valve closed, the Flowmeter is plugged into wall outlet, the float will momentarily jump and fall back to 0

70
Q

Important to remember bourdon vs Thorpe

A

Bourdon is NOT affected by gravity

Thorpe IS affected by gravity

71
Q

A Flowmeter requires what working pressure

A

50 psi

72
Q

What is the purpose of a reducing valve

A

Reducing working pressure to 50 psi

73
Q

All in one E cylinder

A

Most common cylinder used in hospitals today

Saves time applying regulator

74
Q

3 ways to tell Flowmeter Is compensated

A

Labeled, needle valve, affected by gravity

75
Q

Flow restrictor

A

Is set to 7-8 L/M

76
Q

Oxygen blenders

A

When Two 50 psi gas sources are needed usually air and oxygen)

77
Q

When using a blender an alarm will sound when

A

Difference between 2 gas sources is greater than 10 psi

78
Q

Air compressor

A

A device that produces compressed room air 21% oxygen

Home compressors 30 psi

Hospital compressors 50 psi

79
Q

Color for oxygen

A

Green

80
Q

International color for oxygen

A

White

81
Q

Color of carbon dioxide

A

Gray

82
Q

Color of nitrous oxide

A

Light blue

83
Q

Helium color

A

Brown

84
Q

Color of carbon dioxide and oxygen

A

Gray/ green or gray and green

85
Q

Color of helium and oxygen

A

Brown/ green or brown and white

86
Q

Color of air

A

Yellow

87
Q

Color of nitric oxide

A

Teal and black

88
Q

Air compressor and blenders

A

You need a high flow blender to power a ventilator or deliver greater than 15 lpm blended gas flow

Airflow will always give 21%

89
Q

Calculation of FiO2

A

%O2= ((airflow x 21) + (oxygen flow x 100)) / air flow + oxygen

Basic Respiratory Therapy Procedures And Lab (11 decks)

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