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Machines > Part 1 > Flashcards

Part 1 Flashcards

1
Q

Anesthesia machine functions

A
  • Receives gases from central supply system or pressurized cylinders
  • Controls the flow of desired gases & reduces their pressure
  • Measures a precise amount of gases & loads them with anesthetic vapors
  • Provides gas to patient for breathing
  • Provides monitoring & safety features
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2
Q

First anesthesia performed:

A
  • Done by Dr Crawford Long
  • March 30, 1842
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3
Q

Oxygen E-cylinder volume and pressure

A
  • 660 Liters
  • 2200 psig
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4
Q

Nitrogen E-cylinder volume and pressure

A

1590 liters

745 psig

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5
Q

Air E-cylinder volume and pressure

A
  • 625 Liters
  • 2000 psig
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6
Q

The O2 knob is larger & textured differently than the other gases as an added safety measure as well. True or false?

A

True

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7
Q

FiO2

A

O2 (L/min) + Air (L/min) (0.21)
Total Gas Flow (L/min)

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8
Q

Only 1 vaporizer can be used at a time for safety. There is a locking mechanism, called a ______ ______that disengages the other vaporizers once 1 is selected.

A

vaporizer interlock

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9
Q

MAC of des, sevo, iso respectively

A

6.0, 2.0, 1.2

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10
Q

Vaporizers have a ____ ____ system or a ___ ___ system.

A

funnel fill

key fill

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11
Q

Circle System Components

A
  • Fresh Gas Inlet– where anesthetic agents enter circuit
  • Unidirectional Valves
  • Inspiratory Limb
  • Expiratory Limb
  • Gas reservoir bag
  • APL
  • CO2 absorber
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12
Q

Basic Ventilation Modes (3)

A
  • Spontaneous–Patient is breathing on their own without assistance
  • Assisted–Augmentation of tidal volume with patient making some respiratory effort
  • Controlled–Total control of respiration with patient making no respiratory effort
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13
Q

When to change absorbent

A
  • CO2 in inspired gases
  • Color change
  • Heat in canisters
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14
Q

In VCV at 500mL, what happens to the peak pressure & plateau pressure when you increase the respiratory rate from 10 to 20 while leaving tidal volume constant & I:E 1:2?

A

Increase both peak pressure and plateau pressure

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15
Q

What happens to the I:E ratio when you increase respiratory rate?

A

decreases

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16
Q

What happens to the I:E ratio when you increase tidal volume?

A
  • decreases
  • longer inspiration, shorter expiration
17
Q

In volume control mode, waveform is _____ shaped.

A

triangular

18
Q

In pressure control ventilation, waveform is ______ shaped.

A

rectangular

19
Q

Who enforces medical gas purity?

A

FDA

20
Q

As far as regulation goes, who does pretty much everything other than testing for gas purity?

A

DOT

21
Q

The cylinder gases go through:

A
  • A cylinder yoke
  • An inlet filter
  • A pressure gauge
  • A check valve
  • A high pressure regulator
22
Q

_________ was designed as a safety feature to help ensure that cylinders are not installed on the wrong cylinder yoke.

A

Pin Index Safety System

Only used on cylinder sizes A-E

23
Q

Pressure regulators are found ____________.

A

directly behind the yoke

24
Q

If the pressure in the gas supply module is too high, above ________psig, the pressure relief valve opens and vents the gas to atmosphere. .

A

approximately 75

25
Q

When the set pressure is exceeded, the pressure in the cylinder forces the spring to the _____, and gas flows around the safety valve seat to the discharge channel.

A

left

26
Q

The rapid flow of gas through the relief valve may make a loud sound that is easy to identify.
When the pressure relief valve is open, gas continues to flow to the breathing circuit as long as there are sufficient gas supplies. When gas supplies are gone, flow to the breathing circuit stops. True or false?

A

True

27
Q

He tank color

A

brown

28
Q

Heliox cylinder color

A

brown and green

29
Q

CO2 tank color

A

gray

30
Q
A

Machines (7 decks)

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