Exam 3 - Compressed Gases & Vaporizers (Kane) Flashcards
(64 cards)
1
Q
What is a primary source of compressed gas?
A
- wall pipeline source of gas
- transporting on O2 tank
2
Q
When do we use an emergency source of compressed gas?
A
- if pipeline fails & there is no pipeline pressure
- ex: the tank on the back of the machine
3
Q
What is the color for O2?
A
Green
4
Q
What is the color for Air?
A
Yellow
5
Q
What is the color for nitrous?
A
Blue
6
Q
What is psi?
A
pounds per square inch
7
Q
What is a non-liquified gas?
A
- gas that does not liquify @ ordinary ambient temperature
- regardless of pressure applied
- ex: Oxygen, air, helium
8
Q
What is a liquified gas?
A
- gas that becomes liquid to a large extent in containers @ ambient temp and at pressure from 25-1500 psi
- ex: nitrous oxide, CO2
9
Q
What does the FDA oversee?
A
- purity of tanks
- they can only have a minute amount of dust/gunk per sq. inch
10
Q
What does the DOT do?
A
- defines marking, labeling, storage handling
- the info that has to be on the tank
11
Q
What does the Department of Labor/OSHA do?
A
- they deal w/ employee safety
- they get involved if there is an injury (tank exploding when knocked over)
12
Q
Cylinder Components
Body:
1) what is it made out of?
2) how is the base shaped?
3) what is the top called?
A
- long part that holds all the gas
- made out of steel, steel carbon fiber, aluminum
- flat/concave bases (inny belly button)
- neck - screw threads for yoke hanger to be screwed on
12
Q
What does the National Fire Protection Association do?
A
- O2 is flammable & supports combustion
- does not cause it
13
Q
Cylinder components
When would an aluminum cylinder be used?
A
- in magnet rooms
- MRI, cath lab, etc.
14
Q
Cylinder Components
Check Valve:
1) where is it attached?
2) what is it made of?
3) what does it do?
A
- attached to the neck
- made of bronze or brass
- allows refilling & discharge of gas
15
Q
Cylinder Components
What is the handle?
A
- it opens/closes the cylinder
- should be on EVERY cylinder - needed for emergencies
16
Q
Cylinder Components
What is the pressure relief device (safety relief)?
A
- vents the cylinder contents to atmosphere if pressure increases to dangerous levels inside of the cylinder
17
Q
Cylinder components
What are the 3 methods the pressure relief device works?
A
- disc that bursts & allows compressed gas to be vented
- fusible plug melts & allows excess pressure to go out
- spring-like valve opens or or a valve that has pressure underneath it opens & allows excess pressure out
18
Q
What does the Pin Index Safety System (PISS) prevent?
A
- prevents crossover of the wrong cable/tank to the wrong pins/hanger
- ex: same pins for O2, nitrous, air tank
19
Q
PISS
Where are the holes and pins?
A
- holes: on the cylinder valve positioned in an arc below the outlet port
- pins: on the yoke or pressure regulator are positioned to fit into these holes
20
Q
Cylinder Size
“a”
A
smallest ones
* used at grocery stores
21
Q
Cylinder size
“E”
A
- most commonly used on anesthesia machines
22
Q
Cylinder Size
“D”
A
- used for transport - skinnier & longer
23
Q
Cylinder Size
“H/G”
A
- used for refilling other smaller tanks
24
What is the pressure from the cylinder to the machine?
* 45 psi - decreased from 55 psi
25
The tanks on the back of the machine must remain ________.
* closed
26
What 3 things can we do when the wall pressure fails?
* decrease FiO2
* get more tanks
* fix the wall pressure
27
# Contents of the tank vs. pressure in the tank
Non-liquifed gases:
What happens w/ pressure and volume?
* O2, air
* when pressure decreases -- volume decreases
28
What is the typical pressure & volume in a full O2 tank?
* 1900-2000 psi
* 600L
29
# Non-liquified gas
What is the pressure and volume in a half-full tank?
* 950 psi
* 330L
30
# Non-liquified gas
What is the pressure and volume in a 1/4 full tank?
* 475 psi
* 165L
31
With a liquified gas (N2O) - what does the pressure depend on?
Vapor pressure
**not an indication of remaining volume**
32
# Liquified Gas
What is N2O pressure in a full, half-full, and when there is no liquid remaining?
* 745 psi
33
What 5 things does the **DOT** regulate for cylinders?
1. Service pressure
2. Test date
3. Diamond shaped label indicating hazard of gas
4. Name & Address of manufacturer
5. Expiration date of contents
34
# Cylinder Standards
Valves, regulators, & gauges should never come into contact with ________, ________, or ________.
Why?
* oils, greases, or lubricants
* they are combustible
35
# Cylinder Standards
Cylinders should never be subject to temps above ________.
* 54 C (130F)
* volatile little bishes when we are hot
36
# Cylinder Standards
The ________ should always be tight.
Why?
* connections
* don't want stuff leaking to atmosphere (wasteful)
37
# Cylinder Standards
Never cross use ________, ________, or ________.
* hoses, regulators, or gauges
38
# Cylinder Standards
What should not be altered?
markings, lables
39
# Cylinder Standards
How should cylinders be physically handled?
* do not drag, drop, or slide
* properly secure to prevent fall (hanger yoke, carrier, basket)
40
# Cylinder Standards
Should the valve be kept open or closed?
* closed - so we don't lose O2
41
What 6 things are important to have in storage rooms for cylinders?
1. adequate ventilation
2. sign: "no smoking, no combustibles"
3. not exposed to corrosive chemicals, fumes
4. stored upright in bins
5. full cylinders kept separate from empty
6. no wrapping/drapes around cylinders
42
# use of cylinders
What 4 things should we visually inspect before using a cylinder?
1. look @ tank - no dents, grease
2. label, pin index, holes, valve outlet inspected
3. tamper seal removed
4. need 1 washer in place
43
# Use of Cylinders
When do we open the valve to the cylinder?
* in the hallway, before exposed to pt or OR
* face valve outlet away from people!
* open slowly
44
# Use of cylinders
We need to check the ________ ________ before use.
* service pressure (full/empty)
45
# Use of Cylinders
What 3 things should we do if there is a leak w/ the cylinder?
1. screw the screws on better
2. adjust the washer
3. could be faulty hanger yoke/cable - get another
46
What are the pipeline systems used for?
* to deliver non-flammable gases (O2, air, nitrous) to anesthetizing locations and other pt care areas
* ex: OR, PACU, pre-op, ER, pt rooms, x-ray
47
What are the 3 main systems/pieces to the **pipeline system**?
1. Central Supply
2. Piping: received @ 50psi
3. Terminal units: maintains ~50% psi
48
# Pipeline Systems
Where is the central supply located?
* outdoors in enclosure
* indoors in secure area
49
# Pipeline Systems
What is the central supply?
* bank of O2/air tanks that must contain **at least 2 days** supply for entire hospital
* can have primary & secondary locations
50
# Pipeline Systems
Oxygen supply source - gaseous supply
* G & H cylinders & **much bigger** ones
* refilled on site (look like water tanks) or transported
51
# Pipeline Systems
Oxygen supply source - Liquid supply
**less expensive & more convenient to store**
* refilled from supply trucks
* no interruption to service
* take up less space (more in liquid form)
52
# Pipeline System
Classes of piping: What is the piping?
* takes the gas from the CS (tank in parking lot) to the hospital
53
# Pipeline System
Classes of piping: What are the main lines?
* connect CS gas sources to risers
* main lines are horizontal
54
# Pipeline Systems
Classes of Piping: What are the risers?
* vertical pipes
* connect main line w/ branch lines on each level of the facility
55
# Pipeline Systems
Classes of Piping: What are the branches?
* sections supplying a room or group of rooms on one level of the facility
* horizontal out to the places
56
# Pipeline Systems:
What are the terminal units?
* wall unit @ HOB in ICU/OR where we plug the machine in
* color coded w/ flat plate
* uses "DISS" - diameter index safety system OR quick connects
* the nipple & nut vary in bore & diameter
* **prevents cross-linking (awareness & hypoxia)**
57
What are the quick connectors?
* wall, ceiling-mounted, or ceiling column outlets
* allow connection w/ one or both hands w/o tools
* more convenient, leak more
58
What are the shut-off valves?
* valves that allow specific areas of the piping system to be isolated for problems/maintenance
* ex: occlusion, O2 runs out, needs worked on
59
# Shut-off valves
Where do shut-off valves need to be located?
Where can we shut them off at?
* located in specific places from beginning of tank to end terminal
* can shut off @ main line, risers, individual OR levels
60
When do area alarm systems go off?
* if pressure increases/decreases 20% from normal line pressure
61
What 2 things must the area alarm system have?
* audible & visual alarm
* must be labeled for gas & area
62
What areas are notified when an area alarm system goes off?
* maintenance
* engineering
* the affected unit
63
