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Principles 1, 690.01 > Medical Gas > Flashcards

Medical Gas Flashcards

1
Q

Medical Compressed gas defined by Interstate Commerce Commission- ICC

A

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”

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2
Q

Department of Transportation (DOT) responsible for

A

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

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3
Q

ICC (intersate Commerce Commission) responsible for

A

defining gas

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4
Q

types of material used as containers:

A

-titanium container
-carbon fiber container
-plastic container

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5
Q

Container parts- body

A
  • Steel, aluminum alloy, flat on bottom, tapered neck at top, 3/8 inch thick
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6
Q

Valve

A

bronze, brass, attached to neck of tank

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7
Q

port

A

point of gas exit

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8
Q

stem

A

moves up to open or down to close

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9
Q

conical depression

A

fits the retaining screw of the yoke

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10
Q

pressure relief valve

A

vents the cylinder under high pressure

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11
Q

pin index safety system (PISS) for which tanks?

A

A-E

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12
Q

Pin positions: O2=

A

2,5

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13
Q

N2O

A

3,5

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14
Q

Air

A

1,5

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15
Q

CO2

A

2,6

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16
Q

E tank container weight

A

14 lbs- most common tank- fits anesthesia machine

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17
Q

E tank contents and pressure: O2=

A

1900 psig= 660 liters

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18
Q

N2O, nitrous oxide=

A

745 psig= 1590 liters

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19
Q

air:

A

1900 psig, 625 liters

20
Q

Critical Temperature

A

temp above which no amount of pressure can liquefy a gas

21
Q

Critical Temp for N2O=

A

36.5 C

22
Q

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

A

-non flammable
-combustion
-liquid

23
Q

how to measure E-tank N2O contents?

A

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

24
Q

pressure below 745=

A

250 liters or less of N2O in tank

25
Q

Service pressure in psig=

A

max pressure the cylinder may be filled

26
Q

Plus sign on tank=

A

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

27
Q

Star on cylinder indicates=

A

testing can be every 10 years

28
Q

Triangle indicates hazard class of gas: yellow

A

oxidizer = enhance anything under combustion

29
Q

red=

A

flammable gas

30
Q

green=

A
  • non flammable gas
    CO2,nitrogen
31
Q

Container testing=

A

at least every 5 years except if there is star stamp

32
Q

Cylinder colors: green

A

O2 (U.S) white= international

33
Q

gray

A

CO2

34
Q

Blue

A

N2O

35
Q

yellow

A

AIr

36
Q

Cylinder Storage

A

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.

37
Q

Dont identify gas by cylinder color always check:

A

label

38
Q

Pipeline hoses attach to anesthesia machine using

A

Diameter Index Safety System (DISS)

39
Q

Pipeline Gas Central Supply

A

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

40
Q

Pipeline Gas Components; piping

A

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

41
Q

Concerns with pipeline gas

A

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.

42
Q

Hazards of Medical Gas

A

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

43
Q

O2 pipeline failure steps:

A
  • alarm sounds
    -gases stop flowing
    -disconnect pipeline to allow cylinder O2 to flow
44
Q

Cylinder pressure vs pipeline pressure

A

45 kpg to 50 kpg

45
Q

Medical Suction/Vacuum

A

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

Principles 1, 690.01 (2 decks)

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