Laboratory gases
Nitrogen, helium, and carbon dioxide
Anesthetic gases
nitrous oxide
Fire Risk Classifications
Non-flammable (do not burn);
Oxidizing (non-flammable but supportive of combustion);
Flammable (burns readily, potentially explosive)
Characteristics of o2
Odorless, tasteless, colorless
Non-flammable, but supports combustion
Fractional distillation of gases
Most common and least expensive way to produce O2, most common in hospitals. 4 steps
atmospheric air is filtered to remove pollutants, water and CO2. Purified air is liquified by
compression and cooled by rapid expansion. o2 and nitrogen are heated in a distillation tower.
Nitrogen escapes first liquid O2 is transferred and isolated in cryptogenic storage
physical separation
a method used to separate the parts of mixtures without changing their identities. Most commonly
used in homes. System can produce O2 mixture of 40%
FDA purity of O2?
99%
Medical air in hospitals are free of?
Contamination, particles, has no oil or odors, it is also dry
1 liter of liquid O2 =___ and produces ___ liters of gaseous O2
2.5lbs 860 liters
Helium (He) characteristics
Second only to hydrogen as the lightest of all gases it is odorless, tasteless, nonflammable, and
chemically and physiologically inert (does not support life)
What makes helium a therapeutic gas
Mixed with O2, makes Heliox. Also used to manage severe cases of airway obstruction.
, What diseases is nitric oxide used to treat?
Term or near term infants for hypoxic respiratory failure
Cylinders are made from seamless steel, DOT recommends testing every ______ years. The + sign
next to the date indicates?
5-10 years, the plus sign means you can increase you can increase the filling by ten percent above
service pressure
Color code of O2
green
Color code for CO2
gray
Color code for N2O
blue
Color code for helium
brown
Color code for air
yellow
Color code for N2-O2
black/green
How do you determine contents inside a cylinder
Reading the cylinder label
Small (AA-E) cylinders use__________ connectors, and large (F to K) cylinders use
_________connectors
Yoke (not threaded) large cylinders have a threaded valve outlet (small cylinders use "pin index" large
cylinders use diameter index safety system (DISS)"
What do compressed cylinders use to avoid excessive buildup of pressure?
Pressure relief valve
Cylinders of liquid gases are filled according to what?
filling density
How do you monitor remaining contents in a gas cylinder?
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