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Machines > Vaporizers > Flashcards

Vaporizers Flashcards

1
Q

Vapor pressure is dependent on _____ and ____ only. _______ does not matter.

A

temperature and liquid

pressure

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2
Q

Ideal anesthetic properties (6)

A
  • non-flammable and non-explosive at RT
  • vaporizable at RT
  • stable with long shelf life
  • stable with soda lime, plastics, and metals
  • environmentally friendly
  • cheap and easy to make
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3
Q

Biological properties of ideal anesthetic: (6)

A
  • non irritating, pleasant to inhale
  • low blood: gas solubility
  • high oil: gas solubility
  • min effects on body systems
  • no biotransformation
  • non-toxic
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4
Q

Isoflurane:

  • vapor pressure
  • blood:gas
A

238 mmHg

1.4

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5
Q

Sevoflurane:

  • vapor pressure
  • blood:gas
A

160

0.6

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6
Q

Desflurane

vapor pressure

blood:gas

A

670

0.47

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7
Q

Maximum agent concentration:

A

vapor pressure/ barometric pressure

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8
Q

The _____ effect increases vaporizer output.

A

pumping

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9
Q

The _______ effect decreases vaporizer output.

A

pressurizing

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10
Q

Greater PUMPING effect when: (4)

A
  • low agent in vaporizer
  • low FGF
  • low dial setting
  • high and frequent pressure fluctuations
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11
Q

Greater PRESSURIZING effect with: (3)

A
  • high FGF
  • large pressure fluctuations
  • low vaporizer settings
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12
Q

Vaporizer equation:

A

Exam: fraction or percent?

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13
Q

Methods of regulating concentration (2):

A

concentration calibrated (variable bypass)

measured flow (copper kettle)

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14
Q

Methods of vaporization: (3)

A
  • flow over
  • bubble through
  • injection
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15
Q

Vaporizer classifications: (3)

ReST

A

TEMPERATURE COMPENSATION

  • mechanical thermocompensation
  • computerized thermocompensation
  • supplied heat

SPECIFICITY

  • agent specific

RESISTANCE

  • plenum (out of circuit)
  • low resistance (in circuit)
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16
Q

________ _____ are found in mechanical vaporizers.

A

Bi-metallic strips

17
Q

Bi-metallic strips:

________ at cooler temperatures which increase flow.

________ at warmer temperatures which decrease flow.

A

Contract

Expand

18
Q

Output is relatively constant from ____ to ____ºC.

A

20 - 35

19
Q

Purposes of vaporizer manifold: (2)

A
  • where vaporizers mounted on machine
  • passageway for FGF
20
Q

Vaporizer port valves are ____ way valves that are ball and spring loaded. The ball is pressed against its seat until the vaporizer is turned on.

A

2

21
Q

Characteristics of a copper kettle:

  • ______ flow
  • temperature or non temperature compensated?
  • single or multiple agents?
  • in or out of circuit?
A
  • MEASURED FLOW
  • bubble through
  • non temperature compensated
  • multiple agent
  • out of circuit
22
Q

EXAM

Does all the gas pass through the copper kettle?

A

no

23
Q

EXAM

Current vaporizers: (5)

A
  • variable bypass
  • measured flow
  • flow over temperature compensated
  • agent specific
  • out of circuit
24
Q

Desflurane vaporizer type is ______.

Characteristics : (7)

  • heat
  • temp
  • pressure
  • specific
  • in or out of circuit
A

Tec 6

  • electrically heated
  • constant temp
  • pressurized
  • injection
  • thermostatically/electromechanically coupled
  • agent specific
  • out of circuit
25
Q

Aladin cassette vaporizers are ______ ____ type vaporizers.

Characteristics: (4)

type

thermocompensation

non specific or specific?

out or in circuit?

A

variable bypass

  • flow over
  • computerized thermocompensation
  • agent specific
  • out of circuit
26
Q

Aladin cassette vaporizer:

Do fill while the cassette is inside the machine. True or false?

A

false

Do not fill because it is open when the cassette is attached.

27
Q

Aladin cassette vaporizers do contain wicks and/or baffles. True or false?

A

false

28
Q

EXAM

Vaporizer hazards: (6)

A
  • incorrect agent
  • tipping vaporizer
  • overfilling (with key fill)
  • vaporizer mounted incorrectly
  • interlock malfunction
  • vaporizer failure

Machines (7 decks)

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