Medical Gas

Question 1

Medical Compressed gas defined by Interstate Commerce Commission- ICC

Answer 1

as any material or mixture having in the container either an absolute pressure exceeding 40lb/psi at 130 F or any liquid flammable material having a vapor pressure exceeding 40 lb/psi at 100 F”

Question 2

Department of Transportation (DOT) responsible for

Answer 2

-gas standards and regulation
-design, construction, testing, marketing, labeling, filing, storage, handling, maintenance, and transportation of compressed gas cylinders

Question 3

ICC (intersate Commerce Commission) responsible for

Answer 3

defining gas

Question 4

types of material used as containers:

Answer 4

-titanium container
-carbon fiber container
-plastic container

Question 5

Container parts- body

Answer 5

• Steel, aluminum alloy, flat on bottom, tapered neck at top, 3/8 inch thick

Question 6

Valve

Answer 6

bronze, brass, attached to neck of tank

Question 7

port

Answer 7

point of gas exit

Question 8

stem

Answer 8

moves up to open or down to close

Question 9

conical depression

Answer 9

fits the retaining screw of the yoke

Question 10

pressure relief valve

Answer 10

vents the cylinder under high pressure

Question 11

pin index safety system (PISS) for which tanks?

Answer 11

A-E

Question 12

Pin positions: O2=

Answer 12

2,5

Question 13

N2O

Answer 13

3,5

Question 14

Air

Answer 14

1,5

Question 15

CO2

Answer 15

2,6

Question 16

E tank container weight

Answer 16

14 lbs- most common tank- fits anesthesia machine

Question 17

E tank contents and pressure: O2=

Answer 17

1900 psig= 660 liters

Question 18

N2O, nitrous oxide=

Answer 18

745 psig= 1590 liters

Question 19

air:

Answer 19

1900 psig, 625 liters

Question 20

Critical Temperature

Answer 20

temp above which no amount of pressure can liquefy a gas

Question 21

Critical Temp for N2O=

Answer 21

36.5 C

Question 22

E tank N2O contents are non ___ but supports ____. Stored as ____ at room temp

Answer 22

-non flammable
-combustion
-liquid

Question 23

how to measure E-tank N2O contents?

Answer 23

measure tank weight not gauge pressure
-subtract weight of empty tank from weight of tank

Question 24

pressure below 745=

Answer 24

250 liters or less of N2O in tank

Question 25

Service pressure in psig=

Answer 25

max pressure the cylinder may be filled

Question 26

Plus sign on tank=

Answer 26

cylinder can be charged up to 10% in excess of service pressure

Question 27

Star on cylinder indicates=

Answer 27

testing can be every 10 years

Question 28

Triangle indicates hazard class of gas: yellow

Answer 28

oxidizer = enhance anything under combustion

Question 29

red=

Answer 29

flammable gas

Question 30

green=

Answer 30

- non flammable gas CO2,nitrogen

Question 31

Container testing=

Answer 31

at least every 5 years except if there is star stamp

Question 32

Cylinder colors: green

Answer 32

O2 (U.S) white= international

Question 33

gray

Answer 33

CO2

Question 34

Blue

Answer 34

N2O

Question 35

yellow

Answer 35

AIr

Question 36

Cylinder Storage

Answer 36

Designated tank storage area Cool, clean, dry area, free from moisture Not near flame, spark, heat sources Out of direct sunlight Store upright in rack preferred No free standing cylinders Lay on side if no rack available.

Question 37

Dont identify gas by cylinder color always check:

Answer 37

label

Question 38

Pipeline hoses attach to anesthesia machine using

Answer 38

Diameter Index Safety System (DISS)

Question 39

Pipeline Gas Central Supply

Answer 39

Bulk supply system usually liquid Two tank banks for small facilities Tank banks to back up bulk supply

Question 40

Pipeline Gas Components; piping

Answer 40

Piping extending to various locations Terminal units Hoses from terminal units to anesthesia machine or other equipment.

Question 41

Concerns with pipeline gas

Answer 41

Hose disconnect hanging from ceiling Pulled from wall Particulate material contaminating line. Quick couplers are easier to disconnect Hoses across floor can become occluded from heavy equipment rolling over hose.

Question 42

Hazards of Medical Gas

Answer 42

Fires Incorrect Contents Damaged or Inoperable valve Explosion Contaminated contents High pressure release

Question 43

O2 pipeline failure steps:

Answer 43

- alarm sounds -gases stop flowing -disconnect pipeline to allow cylinder O2 to flow

Question 44

Cylinder pressure vs pipeline pressure

Answer 44

45 kpg to 50 kpg

Question 45

Medical Suction/Vacuum

Answer 45

Pipeline connection Quick coupler and DISS Suction pump pulls into wall Minimum negative pressure 12 mmHg Pressure gauge guides pressure regulation Damaged or Inoperable valve