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Anesthesia Concepts > Machine Overview > Flashcards

Machine Overview Flashcards

1
Q

Anesthesia work station consists of: 8

A

Gas supply devices, anesthesia machine, vaporizers, vent, breathing system, scavenging system, respiratory/hemodynamics monitors, suction

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2
Q

What is common gas outlet

A

Delivery of medical gases and vapors of volatile anesthetics in known concentrations

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3
Q

Removal of exhaled gases

A

Scavenging

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4
Q

Standards of anesthesia workstations overseen by 2

A

American society for testing and materials (ATSM)
And
American national standards institute ANSI

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5
Q

Standards specifies what

A

Required components of anesthesia work station

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6
Q

High pressure

A

2000 PSI

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7
Q

Intermediate pressure

A

50 psi

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8
Q

Pressure of gas in hospital

A

50 psi

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9
Q

Green, blue, pink usually stand for what

A

Green- 02
Blue- n20
Pink- agent

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10
Q

What does pressure regulator do

A

Lowers p of gas to 45 psi. Lower than p of hospital

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11
Q

Second stage regulator reduces pressure to what

A

20 psi

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12
Q

5 pathways of oxygen

A 
Flow to fresh gas flowmeters
Powers oxygen flush valve
Activates fail safe valve
Activates o2 supply/low pressure alarm 
Compresses bellows of vent
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13
Q

What is in high pressure system

A

Cylinders, hanger yoke,yoke block w check valves, cylinder pressure gauge, cylinder pressure regulator

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14
Q 
Gas cylinder color 
Air, Oxygen 
Helium 
Co2 
N2, NO
A 
Yellow, green (intl white)
Brown 
Grey
Blue 
Black
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15
Q

Most anesthesia machines use what size cylinder

A

E

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16
Q

Oxygen tank: liters, pressure

A

625 L

2000 psi

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17
Q

NO volume and pressure in tank

A

1590 L

750 psi

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18
Q

Air gas volume and pressure

A

625 L

1800 psi

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19
Q

Pin index safety system numbering

A

1-6, counts from right to left

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20
Q

Placement of holes:
Oxygen
N2O
CO2

A

2-5
3-5
1-6

21
Q

Placement of holes:
Air
Entonox

A

1-5

2-4

22
Q

Pressure in oxygen tank falls ____ to amt of liters left in tank

A

Proportionally

23
Q

Cylinder reassure regulators reduce pressure to ___, second stage to __-__ (___-__)

A

45

12-19 (20-30)

24
Q

Intermediate pressure system: 7

A

Pneumatic part of master switch, pipeline inlets (DISS), pipeline check valves/pressure regulators, oxygen fail safe valve, oxygen second stage regulator, flow meter control valves

25
Q

Wall supply what pressure

A

50-55 psi

26
Q

Oxygen supply to machine what pressure (cylinder)

A

2000-2200 psi

27
Q

Diss
Stands for what
What it connects
Required for what

A

Diameter index safety system
Medical gas lines- body, nipple, nut
Every anesthesia machine

28
Q

What is oxygen pressure sensor shut off valve

A

A safety valve downstream of n20 supply source. Shuts off n2o or decreases it if o2 supply pressure decreases to pre determined threshold level (28)

29
Q

When oxygen enters machine goes to what (2)

A

Pressure sensor shutoff valve and oxygen supply failure alarm system

30
Q

Flow through oxygen flush valve, from what

A

Pipeline/common gas outlet to machine, 35-75 LPM

31
Q

Potential harm from common gas outlet

A

Barotrauma and diluting anesthetic vapors

32
Q

When to use o2 flush valve

A

Machine check

Expiratory phase of respiration to fill bellows

33
Q

Low pressure system: 6

Pressure is slightly above what

A

Flow meter tubes, hypoxia preventing safety (proportioning) device, vaporizers, check valves, pressure relief devices, common gas outlet
Atmospheric pressure

34
Q

At low flow in flowmeter: ___ flow, ___ is important, flow is __
At high flow in flowmneter: ___ flow, ___ is important

A

Tubular (diameter of channel less than length), viscosity, laminar

Turbulent, density

35
Q

Types of flow meters

A

Thorpe tubes and electronic flow sensors

36
Q

Safety features of flow meters: gas is __ __. O2 flow knob is what (3). How hypoxic mixture is prevented

A

Color coded
Flitted, projects beyond other knobs, larger in diameter
Oxygen flow meter downstream from nitrous

37
Q

When fail safe flow meter might not be fail safe

A

Leak in flow meter

38
Q

Anesthesia machine check: when and what

A

Complete daily check q 24h

Circuit check before each check

39
Q

What you check in machine check: 9

A

Gas line connections, integrity of seal of system,
Flow meter controls, ventilator,
Vaporizer levels, oxygen analyzer,
Low pressure circuit leak test, circle system test,
Work station self test

40
Q

Low pressure circuit test
Purpose
Components of this circuit are what

A

Checks integrity of machine from flow control valves to common gas outlet
Most vulnerable to breakage

41
Q

Negative pressure leak test
Procedure requires what
Performed using suction bulb to what, how

A

The machine master switch, flow valves, and vaporizers to be off
Common gas outlet. Bulb squeezed several times until collapsed, created vacuum in low pressure circuit

42
Q

Negative pressure leak test

What tells you there isn’t a leak

A

Bulb remains collapsed for at least 10 seconds

43
Q

Purpose of circle system check

Extends from what to what

A

Evaluates integrity of circle system

Common gas outlet to y piece

44
Q

Circle system check
How to do leak test
Doesnt assess what

A

Occlude y piece, close apl valve. Pressurize circuit to 30 cm h20 using 02 flush valve.
Integrity of unidirectional valves

45
Q

Circle system check

Flow test

A

Attach breathing bag to y piece, turn on ventilator, assess integrity of unidirectional valves

46
Q

What is the most important monitor on machine

A

Oxygen analyzer

47
Q

Oxygen analyzer is only machine that detects what

A

Problems downstream from flow control valves

48
Q

Oxygen analyzer procedure

A

Expose o2 sensor to room air (21%) for a given time

49
Q

Best monitor you have

A

Vigilance

Anesthesia Concepts (12 decks)

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