Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Anesthesiology > Anesthesia Machine > Flashcards

Anesthesia Machine Flashcards

1
Q

2 types of vaporizer Temperature compensation

A
  1. Thermocompensation

2. Supplied heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What color are oxygen tanks?

A

green

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Function of the vaporizer

A

facilitates the change of a liquid anesthetic into its vapor and add a controlled amount of this vapor to the fresh gas flow.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

the operating pressure of the pipeline gas supply is _______ psig

A

50-55

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

T/F

Oxygen is wet when it comes out of the cylinder

A

F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

____________ use unique pin and receptacle combinations on cylinder hanger yokes to prevent
the misconnection of a gas cylinder to the wrong cylinder inlet.

A

Pin Index Safety System (PISS) Connections

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

_____: This is the junction where the gas emerging from each flow meter must be joined together.

A

manifold

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The flowmeter will function correctly if the tube is _______

A

vertical

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Structural components of the high-pressure system (4)

A
  • gas source
  • pressure regulator
  • flow control valve
  • oxygen flush
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

function of the breathing bag

A

allows accumulation of fresh and expired gases during expiration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

3 Methods of vaporization

A
  1. Flow over
  2. Bubble through
  3. Injection
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The scavenging system can be composed of the following: (3)

A
  1. Gas collecting assembly
  2. Interface
  3. Disposal system
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

_______: collects excess gas from the breathing system and transports it to the waste gas evacuation system

A

scavenging system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What color are N2O tanks?

A

blue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

2 types of vaporizer specificity

A
  1. Agent specific

2. Multiple agent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

When a anesthetic machine is attached to both pipeline gas and the gas cylinder is turned on, what would the machine preferably use the pipeline gas?

A

Pipeline gas runs at 50 psig while the gas cannisters run at 45 psig. The pressure difference causes the machine to preferably use the pipeline gas.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

________ breathing system: with reservoir for anesthetic gas mixture, complete rebreathing of expired gas without the CO2 (CO2 removed by soda lime or baralyme in a canister).

A

closed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Components of the low pressure system

A
  • flow meter
  • manifold
  • vaporizer
  • fresh gas outlet (common gas outlet)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Features of a precision vaporizer (5)

A
  • concentration calibrated (variable bypass)
  • flow over
  • thermocompensated,
  • agent specific
  • high resistance.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Liquid oxygen is less _______ and preferred when ________

A
  • expensive

- large amounts of oxygen are needed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

The amount of gas remaining in an E-cylinder is directly proportional to its ______

A

pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

_______ separates the high-pressure system from the low-pressure system

A

flow control valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

______exists as a liquid when compressed in a cylinder

A

N2O

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

the ________ safety system can be defeated by pulling out the pins or by placing extra washers between the hanger yoke and the cylinder stem

A

Pin Index Safety System (PISS) Connections

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

________: provides direct connection between the high-pressure system and the breathing system and bypasses the vaporizer

A

oxygen flush valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

______: where an O2 and anesthetic gas mixture are blended

A

low-pressure system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

___________ is accomplished by using different sizes of body, nipple, and nut for different gases

A

Diameter Index Safety System (DISS) Connections

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Precision vaporizers for _______ and ______ are the most commonly used in practice.

A
  • isoflurane

- sevoflurane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

The indicator or float of a flowmeter is read at the ____ except for the ____ type, which is read in the ______

A
  • top
  • ball
  • center
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Characteristics of “old” or exhausted soda lime (4)

A
  • Hard and chalky
  • Color turns blue/violet with exhaustion (if ethyl violet is used as the pH sensitive dye)
  • CO2 canister stays cool during anesthesia
  • Slightly salty taste (Again, do not attempt to taste it.)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

______ tanks are green

A

oxygen

32
Q

3 disadvantages of a non-rebreathing system

A

a. Very high gas flow needed in mL/kg/min and higher anesthetic consumption especially in bigger animals
b. Inspired gas is not humidified leads to a greater loss of body heat
c. More pollution of the environment

33
Q

the _______ carries the gas mixture and attaches to the breathing system.

A

fresh gas outlet (common gas outlet)

34
Q

_________ releases excess gases to the atmosphere and provides the connection to the scavenging system

A

Adjustable pressure limiting valve (popularly known as the pop-off valve)

35
Q

2 features of non-rebreathing systems

A
  1. The non-rebreathing systems provide less dead space than circle breathing systems
  2. The non-rebreathing systems provide less or no resistance to breathing compared with the circle breathing systems.
36
Q

hypoxic gas is defined as inspired O2 concentration below _____%

A

21%

37
Q

3 functions of the interface

A
  • prevents the transfer of pressure changes in the scavenging system to the breathing system
  • provides positive pressure relief to protect the patient from occlusions of the scavenging system
  • provides negative pressure relief to limit the pressure effects of an active disposal system
38
Q

The safety features of the high pressure system are designed to prevent ______________

A

delivery of hypoxic gas to the patient

39
Q

function of unidirectional valves

A

ensures that gases flow toward the patient in one breathing tube and away in the other breathing tube

40
Q

in a _________ an internal tube supplies fresh gases to the patient end of the system minimizing mechanical dead space

A

Bain Coaxial System

41
Q

Characteristics of fresh soda lime (4)

A
  • Crumbles easily
  • White
  • CO2 canister feels warm during anesthesia
  • Bitter taste (Do not taste it though. It is corrosive when swallowed.)
42
Q

_______ breathing system: no reservoir for anesthetic gas mixture and no rebreathing of expired gas

A

open

43
Q

__________ allow faster connection of gas supply hoses to the pipeline outlets than do the DISS connectors

A

Quick Connectors

44
Q

in _______ specificity of the connectors is based on matching the pins and holes

A

Quick Connectors

45
Q

What are the 2 sizes of gas tanks? Which is larger?

A
  • H and E

- H

46
Q

________: delivers the anesthetic gas mixture to the patient

A

breathing system

47
Q

Characteristics and features of a good precision vaporizer

A

Produces accurate anesthetic concentrations over a range of gas flows of 300 ml/min to 10.0 liters/min

b. Has reliable temperature compensation mechanism
c. Able to compensate for changes in pressure, e.g., pressure transmitted to the vaporizer during positive pressure ventilation
d. Presence of keyed filler systems to prevent use of the wrong liquid anesthetic

48
Q

When the pressure in a N2O tank begins to drop, the content is about _____% of a full tank. After this point, the pressure correlates directly with the volume remaining

A

25%

49
Q

______: a three-way tubular connector which connects the inspiratory and expiratory sides of the system to the patient

A

Y-piece

50
Q

_________ measures the flow of gas emerging from the flow control valve

A

flowmeter

51
Q

The use of oxygen flush should be reserved for use in ____________

A

recovery when using a rebreathing system (circle) to rapidly replace the gas in the breathing bag when it is emptied to expedite the reduction in the anesthetic concentration in the circuit

52
Q

__________ breathing system: with reservoir for anesthetic gas mixture, partial rebreathing of expired gas and with CO2 absorption

A

semiclosed

53
Q

2 methods of regulating output concentrations in vaporizers

A
  1. Concentration calibrated or variable bypass

2. Measured flow or kettle-type

54
Q

2 types of vaporizer resistance

A
  1. Plenum

2. Low resistance

55
Q

_______: source of the dead space in a circle breathing system

A

Y-piece

56
Q

________: with reservoir for anesthetic gas mixture, no rebreathing of expired gas and without CO2 absorption

A

semiopen

57
Q

3 safety features that may be used in the high pressure system

A
  • Diameter Index Safety System (DISS) connections
  • Quick Connectors
  • Pin Index Safety System (PISS) Connections
58
Q

the ______allows maintenance of constant flow as cylinder pressure changes. It prevents
flowmeter fluctuations

A

pressure regulator

59
Q

2 types of gas sources

A
  • pipeline gas supply

- cylinders of compressed gas

60
Q

function of the breathing system

A

to deliver the anesthetic gas mixture to the patient

61
Q

components of circle breathing systems (7)

A
  • CO2 absorber
  • Unidirectional valves
  • Breathing bag (reservoir bag)
  • Breathing tubes and Y-piece
  • Pressure gauge
  • Negative pressure relief valve
  • Adjustable pressure limiting valve (popularly known as the pop-off valve)
62
Q

N2O is compressed at _____ psig and O2 is

compressed at ______ psig

A
  • N2O : 745 psig

- O2 : 2200 psig

63
Q

6 characteristics of vaporizers

A
  • location
  • method of regulating output concentrations
  • method of vaporization
  • temperature compensation
  • specificity
  • resistance
64
Q

How do you determine the appropriate breathing bag size for a patient?

A

6 times the tidal volume
Tidal volume = 10-15 ml/kg

Choose the bag that is equal or slightly bigger, not smaller, than the calculated size.

65
Q

Oxygen can be stored as liquid at a temperature of ____

A

-297 degrees C

66
Q

A full H tank holds about _____ L of oxygen

A full E tank holds about _____ L of oxygen

A

H - 6,900 L (7,000)

E - 700 L

67
Q

2 problems associated with circle breathing systems

A
  • Resistance to breathing

- Dead space

68
Q

___________ is designed to prevent the misconnection of a gas supply hose to the wrong pipeline gas inlet

A

Diameter Index Safety System (DISS) Connections

69
Q

2 vaporizer locations

A
  1. In the circuit

2. Out of the circuit

70
Q

Disadvantages of the circle breathing system using a vaporizer out of the circuit

A
  1. Expensive vaporizer
  2. Slow changes in anesthetic concentration because the expired gas dilutes the anesthetic concentration in the breathing circuit
71
Q

_______ tanks are blue

A

N2O

72
Q

________:where the pipeline and cylinder gas supplies are connected; responsible for regulating the pressure

A

high-pressure system

73
Q

T/F

Flowmeters are interchangeable between gases

A

F

74
Q

4 types of breathing systems

A
  • open
  • semiopen
  • semiclosed
  • closed
75
Q

_____ exists as a gas when compressed in a cylinder

A

oxygen

76
Q

3 advantages of a non-rebreathing system

A

a. No valves, so low resistance
b. Good control of anesthetic concentration which means that the inspired anesthetic concentration is the concentration set on the vaporizer
c. Less dead space

77
Q

Advantages of the circle breathing system using a vaporizer out of the circuit (4)

A
  1. The output of the vaporizer is not affected by the changes in the ventilation of the patient
  2. Assisted or controlled ventilation will not greatly increase the inspired anesthetic concentration
  3. Known anesthetic concentration can be delivered to the patient breathing circuit
  4. Inspired gas, especially at low fresh gas flow, is humidified resulting in decreased loss of patient’s body heat

Anesthesiology (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions