Chapter 37: Storage and Delivery of Medical Gases

Question 1

Color code for Oxygen (O2)

Answer 1

Green or white

Question 2

Color code for Nitrous Oxide (N2O)

Answer 2

Light blue

Question 3

Color code for Carbon dioxide (CO2)

Answer 3

Gray

Question 4

Color code for CO2 + O2

Answer 4

Gray + green

Question 5

Color code for Helium (He)

Answer 5

Brown

Question 6

Color code for HeO2

Answer 6

Brown + green

Question 7

Color code for Nitrigen (N2)

Answer 7

Black

Question 8

Color code for air

Answer 8

Yellow

Question 9

What is in the cylinder?

Answer 9

Liquid or compressed air

Question 10

Do we work with flammable gases?

Answer 10

No

Question 11

Which gas accelerates combustion?

Answer 11

Air

Oxygen

Question 12

Which gases are nonflammable?

Answer 12

Laboratory gas - Carbon dioxide, Nitrogen
Helium - therapeutic, laboratory gas
Inert low density gas

Question 13

Which gas used as anesthetic?

Answer 13

Nitrous oxide - supports combustion

Question 14

Which gases are used as therapeutic?

Answer 14

Air
O2
He (Heliox mixture)
Nitric oxide

Question 15

Facts about Air

Answer 15

• direct use from atm
• medical grade compressor (oil free, Teflon rings, filter, compress, dry)
• accelerates combustion
• Yellow tank
• Label - purity (USFDA, usp)

Question 16

Facts about O2

Answer 16

• accelerates combustion

* Produced by fractional distillation

Question 17

Fractional distillation

Answer 17

• Liquid air
• Warmed just below boiling point of liquid oxygen -183
• 99% pure

Question 18

Storge of O2

Answer 18

• Liquid - Cryogenic container, super thermos

* Compressed gas - tanks

Question 19

Heliox

Answer 19

• Helium/Oxygen mixture (80/20)
• Therapeutic gas
• Used to treat diseases that cause high airway resistance (acute asthma)
• Brown/green tank

Question 20

Cylinder material

Answer 20

Seamless steel

Question 21

Types of seamless steel

Answer 21

• Chrome-molybdenum (3AAA heat trated)
• 3A Carbon steel (not heate treated)
• 3AL seamless aluminum alloys

Question 22

Cylinder pressure

Answer 22

Normal filling pressure - 2000psi

Question 23

If tanks exceed the hydrostatic pressure test, they can be filled an additional?

Answer 23

10% or 2200psi

Question 24

Hydrostatic pressure

Answer 24

• Water displacement

* Elastic expansion - (in cc, tank wall becomes weak, elastic expansion increases; cause corrosion)

Question 25

What do you check on the label?

Answer 25

• USFDA
• USP
• content liable much match color
• purity