Machine Exam Flashcards
(109 cards)
1
Q
How is O2 manufactured
A
fractional distillation of liquefied air
2
Q
How many L is in a full O2 tank
A
660L
3
Q
How many psi is in a full O2 tank
A
2000 psi
4
Q
How is N2O manufactured
A
thermal decompensation of ammonium nitrate
5
Q
How many L is in a full N2O tank
A
1590L
6
Q
How many psi is in a full N2O tank
A
745psi
7
Q
What is in Wood’s metal
A
BLT with cheese
Bismuth, lead, tin, cadminum
8
Q
What is the pipeline pressure
A
50psi
9
Q
What is pipeline made of
A
wrought copper
10
Q
What is PISS
A
pin index safety system, prevents interchangeability of cylinders on the cylinder yoke
11
Q
O2 pin positions
A
2,5
12
Q
Air pin positions
A
1,5
13
Q
N2O pin positions
A
3,5
14
Q
What type of pressure gauge is on the high pressure side
A
bourdon gauge- hollow copper coil
15
Q
what type of valve is in the first stage regulator
A
diaphragm type
16
Q
what valve is on the high-pressure side
A
floating check valve for O2 and N2O limbs
17
Q
what does the floating check valve do?
A
prevents transfilling of cylinders in dual system, allows change of cylinders, and minimizes leaks to atmosphere
18
Q
what is the purpose of a yoke plug
A
prevents O2 leak of floating check valve broken
19
Q
What is the cylinder pressure after first stage regulator
A
45psi
20
Q
What is DISS
A
diameter index safety system- nut and bolt system that prevents wrong pipeline hose connection
21
Q
What to do if hospital pipeline crossover
A
disconnect pipeline
turn backup O2 tank on
22
Q
What type of valve is the flush valve
A
type III
23
Q
What does the flush valve do?
A
direct connection from O2 source at a rate of 35-75 LPM
24
Q
Where do the majority of leaks occur
A
low pressure side
25
What type of tube is a flowmeter
Thorpe tube/variable orifice( V-shaped)
26
area between the bobbin and tube in flowmeter
annular opening
27
minimal o2 flow through flowmeters
200-300mL
28
Which type of flowmeter is most accurate
electronic flowmeter-uses solenoid principle (mass of gas is registered and measured through electronic mass flow sensor)
29
3 features of a style 1 vaporizer
variable-bypass
temperature compensated
flow over wick
30
What is variable bypass
most of the gas goes right by the chamber, only a little picks up vapor. Splitting ratio
31
What is flow over wick
pulls up liquid anesthetic higher in the vaporizer to get more molecules distributed more evenly in vaporizer
32
What is temperature compensated
bimetallic strip that opens or closes depending on ambient temp
33
What type of vaporizer is the Aladin model
type 1 but coputerized
34
7 features of the Tec 6
dual circuit
gas blender (injected into fresh gas flow)
heated
pressurized
CPU chip
back pressure
diaphragm
35
What is the Tec 6 heated to
39-40
36
What is vaporizer tipping
more than 45 degrees
37
what can vaporizer tipping cause
overdose
38
What to do if vaporizer tips
drain vaporizer sump
flush 20-30 mins at high flow rates with high concentration set on dial
39
Liquid anesthetic usage calculation
3x FGF (L/min) x vol% (as whole number)= mL liquid used per hour
40
AC power supply much have how much time
30 mins at least
41
what do insp and exp valves do in circle system
assure unidirectional flow
42
What does the circle system pressure gauge do
monitors airway pressures when not on ventilator
43
what is the y-piece
connects breathing circuit to patient
44
where is the reservoir bag
on the expiratory side
45
Main component of CO2 absorber
calcium hydroxide
46
what do sodium and potassium do on CO2 absorber
catalyst for the chem reaction
47
exothermic CO2 absorption reaction releases ___ kcal for every 22.2 liters of CO2 absorbed
13,700 kcal
48
what size mesh is used
4-8 mesh
49
the higher the mesh number the _____ the absorbent particle
smaller
50
first reaction of CO2 absorber produces what
carbonic acid
51
last reaction of CO2 absorber produces what
4 water
sodium carbonate
calcium carbonate
52
how much moisture is in CO2 absorber granules
10-22%
53
what does silicate do in CO2 absorber
prevents granules from becoming dust in transport
54
what can dust fines from soda lime do
laryngospasm
bronchospasm
machine failure
55
how to fill CO2 absorber
avoid pyramiding
fill 3/4 way
56
what signifies exhaustion
ethyl violet
57
most reliable method of detecting exhaustion
ETCO2 never returns to baseline
58
baralyme + sevo=
exothermic reaction (baralyme discontinued)
59
Compound A effect on the body
nephrotoxic
60
which volatile agent causes compound A formation
sevo
61
contributing factors of compound A formation
low flows
high sevo concentration
62
Sevo FGF
1LPM for up to 1hr
2LPM greater than 1hr
63
Carbon monoxide formation
in dry potassium or sodium hydroxide absorbents
64
Closed system define
low flows 300-500mLs, everything stays in system, nothing leaves in scavenging system
65
the lower the FGF, the more you rely on ___
CO2 absorber granules
66
semi-closed system define
some rebreathing occurs
FGF and pop off valves at intermediate values 3-6L
50% of gas rebreathed after CO2 removal
67
semi-open define
high FGF (10L) with minimal rebreathing and more venting of waste gas
68
5 steps of Pethich test
1. assure patency of inner insp. tube
2. occlude patient end
3. close APL
4. fill circuit
5. release occlusion at elbow, bag should collapse
69
acceptable ppm for halogenated agent alone
2ppm
70
acceptable ppm for n2o alone
25ppm
71
acceptable ppm for halogenated agent +N2O
0.5ppm
25ppm
72
acceptable ppm for N2O in dental facilities
50ppm
73
most complex component of the scavenging system
interface
74
What does the scavenging interface do
provides positive pressure or negative pressure relief and may provide reservoir capacity
prevents pressure increases or decreases in the scavenging system from being transmitted to circuit or ventilator
75
which valves are in a passive system
positive pressure relief valve
76
which valves are in a closed system
positive and negative pressure relief valve
77
where is an ascending bellow attached
base of the assembly
78
what happens to an ascending bellow if insp or exp limb disconnect
bellow collapses (safety featur4e)
79
where is a descending bellow attached
top of the assembly
80
what happens to a descending bellow if insp or exp limb disconnect
continues to work
81
3 components of traditional circle breathing systems
insp and exp valve, popoff valve
82
which breathing system only has a pop off valve?
mapleson D/Bain
83
what safety relief device on top of the valve on the ecylinder melts at 175 degrees
woods metal
84
Link 25 proportioning system- what is it and what is its purpose
Link N2O and O2 flows mechanically with a chain- GE
prevents hypoxic mixture
85
What are the 2 starting molecules in CO2 absorption reaction
H2O and CO2
86
What does carbonic acid break down into
ions
87
all open systems have to be ___
active
88
how to tell what pressure relief system an ecylinder has
you can't
89
2 ecylinder materials
steel
aluminum
90
aluminum abbreviation
Al or alm
91
steel abbreviation
AA
92
Where are O2 flowmeters locacted
far right in case of crack
93
which feature of the anes. machine allows all the other safety features to work and knocks down the pressure from 45-50 psi to 12-16
second stage regulator
94
GE pressure sensor/ failsafe system does what
shuts OFF other gases of O2 pressure is less than 20 psi
does NOT proportionally restrict
95
who regulates purity
US pharmacopeia
enforced by the FDA
96
if you have half a tank of O2 how much time do you have left when running @2LPM
165 minutes
97
which anes gas is liquid
N2O
98
how do i know how much O2 left in tank
pressure gauge
99
how do i know how much N2O left in tank
weigh
100
what to do if monday morning you come in and the machine was running @5 L all weekend
change CO2 absorber
101
how often do ecylinders need inspected
q5yrs unless special permission for q10yrs
102
inner tubing retracted back in insp limb causes what
dead space
103
What to do if you crank down on retaining screw when cylinder on hanger yolk but its hissing
check washer- one time use
104
international O2 tank color
white
105
32 granule would ____
increase resistance
106
who investigates a crash if O2 cylinders fall off truck
DOT
107
What is in the high pressure system
Hanger yolk and yolk block
O2 and N2O cylinders
floating check valves
cylinder pressure gauges
First stage pressure regulator
108
What is in the intermediate pressure system
Pipeline
pipeline pressure gauges
O2 pressure failsafe device
O2 second stage regulator
O2 flush valve
Ventilator power inlet
Flowmeter valves
109
What is in the low pressure system
flow meters
vaporizers
check valve after vaporizer
common gas outlet
