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Anesthesia Concepts > Machine Overview- EXAM 2 > Flashcards

Machine Overview- EXAM 2 Flashcards

0
Q

the anesthesia workstation consists of:

A
  • anesthesia machine
  • vaporizers
  • ventilator
  • breathing system
  • scavenging system
  • respiratory and physiologic monitors
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1
Q

An ________________ integrates most of the components necessary for administration of anesthesia into one unit.

A

anesthesia workstation

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2
Q

the anesthesia workstation provides delivery of medical gases and volatile anesthetics at the ______________

A

Common gas outlet

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3
Q

Which kind of gas is removed from the breathing system?

A

Exhaled gases

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4
Q

How often do computer driven machine need to be turn off and restarted?

A

Every 24 hrs

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5
Q

Who sets the standards for the anesthesia workstations?

A
  • American Society for testing and materials ASTM

- American National standards Institute ANSI

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6
Q

What are the 5 pathways of oxygen?

A
  • flow to fresh gas flowmeters
  • powers the oxygen flush valve
  • activates the fail safe mechanism
  • activates the oxygen low pressure alarm
  • compresses the bellows of the ventilator
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7
Q

The air pressure system contains what 3 types of pressure systems?

A
  • high pressure
  • intermediate pressure
  • low pressure
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8
Q

The high pressure system consists of:

A
  • cylinders/tanks: the pressure within them
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9
Q

The purpose of the high pressure system is to :

A

Reduces pressure suitable for use in the machine

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10
Q

E cyclinder reduces pressure from _____ psi to _____ psi in order for it to be compatible with the machine.

A
  • 2000

- 45

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11
Q

The pressure indicator that displays the cylinder pressure for each gas is supplies by the __________.

A

Cyclinders

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12
Q

The intermediate system consists of :

A
  • pneumatic part of the master switch
  • pipeline sources (O2, N2O and Air- DISS diameter index safety system)
  • pressure regulators
  • oxygen pressure failure device
  • oxygen flush valve
  • flowmeter control valves
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13
Q

The purpose of the DISS (diameter index safety system) system for pipeline gas:

A
  • to provide non interchangeable connections for medical gas lines
  • only properly mated parts will fit together and allow threads to engage
  • each connector will only fit into certain sizes
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14
Q

The low pressure system consists of:

A
  • flow meter tubes
  • hypoxia prevention safety device
  • unidirectional valves (outlet check valve)
  • pressure relief devices
  • common gas outlet
  • vaporizers/vaporizers manifold
  • (pressure is slightly above atmospheric pressure)
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15
Q

Engaging the O2 flush valve will deliver how much oxygen?

A

35-70 L/min of O2

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16
Q

What is the main driving force of the anesthesia machine?

A

Oxygen

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17
Q

Every anesthesia machine should be equipped with a backup ______?

A

O2 tank

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18
Q

Air contains what fraction of oxygen?

A

21%

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19
Q

How much oxygen is contain in nitrous oxide?

A

0%

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20
Q

Exhaled gases are removed by which part of the machine?

A

Scavenging system

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21
Q

Anesthetic gas and O2 is delivered via the _________

A

Common gas outlet

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22
Q

All machine have a master function to turn on the ________ and __________.

A

Pneumatic and electrical component of the machine

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23
Q

The O2 pressure sensor shut-off valve is a safety valve located downstream from the ________

A

N2O supply source

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24
Q

The purpose of O2 pressure sensor shut-off valve:

A

Is to shut off N2O or proportionally decrease the supply of N2O allowed into the machine, if O2 supply pressure decreases to a pre-determined threshold value (25 psi)

  • anesthetic will flow but it’s only being run off of O2
25
Q

The O2 pressure sensor shut-off valve cannot prevent hypoxic mixtures because it only detects _______.

A

Pressure

26
Q

Oxygen enters the machine and flows to the: (2 components)

A
  • pressure-sensor shutoff valve

- and the oxygen supply failure alarm

27
Q

What are the 2 types of pressure-sensor shut off systems?

A
  • proportioning type (OFPD- oxygen failure protection device)
  • threshold type
28
Q

2 sources of O2 supply and there corresponding pressures:

A
  • pipeline: 50-55 psi

- cylinder: 2200 psi

29
Q

Cylinders are primarily a _________ source of gas.

A

Secondary

30
Q

The cylinder pressure needs to down regulated from 2200 psi to _____ psi, in order to be compatible with the machine.

A

45 psi

31
Q

DISS fittings are applicable to which 2 gases?

A

O2 and N2O

32
Q

The typical O2 cylinder used in the:

A

E cylinder

33
Q

The PISS (pin index safety system) prevent:

A

The wrong gas tank being attached to the wrong gas outlet source

34
Q

Oxygen’s PIN number are:

A

2 and 5 (green)

35
Q

Nitrous oxide PIN numbers are:

A

3 and 5 (blue in color)

36
Q

Air’s PIN numbers are:

A

1 and 5 (yellow in color)

37
Q

E cylinder contains: how much pressure and how many liters of O2?

A
  • 2000 psi

- 625-700L

38
Q

Nitrous is stored as:

A

Liquid

39
Q

N2O cylinder pressure is reduced from 745 psi to ______ psi.

A

45 psi

40
Q

The purpose of flowmeters is to:

A

Measure gas flow to the common gas outlet

41
Q

The oxygen flow meter is positioned…

A

Downstream from nitrous

42
Q

Why is the oxygen flowmeter positioned down stream from the nitrous

A

To prevent a hypoxic mixture if a leak is present (not full proof)

43
Q

List 3 characteristics of O2 flow nob:

A
  • distinctively fluted
  • projects beyond the control knobs of other gases
  • larger in diameter
44
Q

Use of the O2 flush in a patient can potentially cause:

A

Barotrauma

45
Q

The O2 flush will deliver:

A

35 to 75L/min

46
Q

2 purposes of the O2 flush:

A
  • aid in the machine check

- helps fill bellows on the expiratory phase of respiration

47
Q

To check the proportioning link system you turn on the N2O and what else should turn on with it?

A
  • O2
48
Q

If you are running 2L of O2 and 2L of N2O, what is your FiO2?

A
  • FiO2 is 50%
49
Q

Anesthesia machine check: What are the 2 main checks?

A
  • machine check daily

- circuit check before each new case

50
Q

What is the gold standard for ventilation monitoring?

A

EtCO2

51
Q

EtCO2 is best for revealing:

A

Disconnect

52
Q

The most important monitor on the machine:

A

Oxygen analyzer (helps detect hypoxia) - calibrate at 21% O2

53
Q

What are we checking on the machine?

A
  • gas line connections
  • ventilator check
  • flow meter controls
  • vaporizer levels
  • oxygen analyzer
  • low pressure circuit leak test
  • circle system test
  • workstation self tests
54
Q

What part of the machine detects problems downstream from flow control valves?

A

Oxygen analyzer

55
Q

What is the purpose low pressure circuit test?

A

It checks the integrity of the machine from the flow control valves to the common gas outlet

56
Q

1993 FDA Negative-Pressure Leak Test: purpose of the suction bulb-

A

If the bulb remains collapsed or at least 10 seconds the machine is leak free

57
Q

Purpose of the circle system check:

A

It evaluates the integrity of the circle breathing system

58
Q

The circle breathing system extends from the ….

A

Common gas outlet to the Y-piece

59
Q

The circle system leak test is performed by:

A

Occluding the Y-piece, the APL valve is closed and the circuit is pressurized to 30 cm of water using the O2 flush valve (does not assess integrity of unidirectional valves)

60
Q

The circle system flow test is performed by:

A

Attaching breathing bag to Y-piece, turn on the ventilator and assess the integrity of unidirectional valves

Anesthesia Concepts (8 decks)

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