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Principles Exam III > Gas Machine > Flashcards

Gas Machine Flashcards

0
Q

What type of equipment was involved (and the percentage)in 88% of cases which had mortality/ morbidity noted.

A
  • breathing circuit 39%

- Oxygen supply tanks/ lines 11%

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1
Q

Gas Machine Definition

A

A device which delivers a precise-known but variable gas mixture, including anesthetizing & life sustaining gases

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2
Q

Misuse of equipment counted for what percentage in cases leading to mortality/ morbidity?

A

75% (3x more common than equipment failure at 24%)

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3
Q

Vaporizers accounted for what percentage of the 83% of claims from 1990-2011?

A

35%

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4
Q

How much did the breathing circuit accounted death/morbidity in 83% of claims from 1990-2011. What was the cause of this?

A

4 cases r/t obstruction of circuit due to sticking inspiratory or expiratory unidirectional valves

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5
Q

85% of all errors involve_____

A

provider error

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6
Q

What’s the normal working pressure of the machine?

A

50 psi

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7
Q

How much flow from the oxygen flush?

A

35-75L/min

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8
Q

NIOSH Standard for halogen WAG (with & w/out N2O)

A

2 ppm

0.5 ppm with N2O

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9
Q

what is WAG

A

waste anesthesia gas

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10
Q

NIOSH standard for nitrous oxide WAG

A

25ppm

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11
Q

What are scavenger tube sizes

A

19 or 30mm

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12
Q

Size of ETT or CGO (common gas outlet)

A

15mm

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13
Q

Size of the breathing circuit

A

22mm

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14
Q

What is the gas machine standard

A

ASTN F1850 Anesthesia workstation standard (per the industry advising group)

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15
Q

How many liters per second is 35-75L/min O2

A

1L/sec

16
Q

What helps prevent exposure to WAG

A

scavenging

17
Q

What is the function of the ASTM F1850

A

Specifies what is needed for an anesthesia work station (typically built into new machines)

18
Q

ASTN F1850 required components

not sure if on exam…each topic has more details written in notes/ N&P

A
  1. Back up batteries for 30 min.
  2. Alarms (high, medium, and low priority alarms)
  3. Required monitors (ex. O2 supply failure, ETCO2, EKG, etc.)
  4. Pressure in breathing circuit limited to 12.5kPa (125cm H20)
  5. Non-detachable/ resistant to detaching electric supply cord
  6. Cylinder supplies
  7. Flow meters
  8. O2 flush capable of 35-75L/min flow that doesn’t proceed through any vaporizers
  9. Vaporizers
  10. Only 1 common gas outlet @ 22-mm outer diameter, 15mm inner diameter designed to prevent accidental disconnection
  11. Pipeline gas supply
  12. Checklist provided
  13. Digital data interface
19
Q

Five tasks of O2

A
  1. Ventilator
  2. Oxygen Pressure fail alarm (decrease pressure)
  3. Flush valve
  4. Flowmeter
  5. “Fail Safe” (pressure sensor shutoff valve)
20
Q

That does “SPPD” (model) mean?

A
  • Supply
  • Processing
  • Delivery
  • Demand
21
Q

What components of the gas machine are in the “High” pressure category? (5)

A
  • Pressure Regulator
  • Hanger Yoke
  • Yoke block with check valves
  • Check Valve
  • Cylinder Pressure Gauge
22
Q

High-Pressure system is exposed to what type of pressure?

A

Cylinder pressure

23
Q

Low Pressure Circuit components of AGM & its location

A

(Located distal to flowmeter needle valve)

  • Flowmeters (tubes)
  • Vaporizers (calibrated)
  • Check valve (if present)
  • common gas outlet
  • Flow control valve (on handout)
24
Q

Intermediate parts of AGM and its location

A

(exposed to pipeline pressure, 50psi)

  • Pipeline inlets
  • Ventilator power outlet
  • O2 pressure-failure devices
  • Flowmeter valve
  • O2 2nd stage regulator
  • Flush valve (oxygen)
25
Q

***Where is O2 added to the machine and why that location

A

Added to the COMMON MANIFOLD downstream to prevent O2 lost if there’s a leak (leak more likely to happen upstream)

26
Q

***Where does O2 first mix with other gases

A

common manifold

27
Q

What part of the AGM seperates components wMin the machine from external components

A

The common gas outlet (machine outlet)

28
Q

How many tasks does N20 & air have each w/in the AGM

A

One

29
Q

How many tasks does O2 have & what are they

A

(5)

  1. Low pressure alarm (Oxygen pressure failure alarm) (Notifies if loss or decrease in pressure)
  2. Ventilator driving gas
  3. O2 flush valkve
  4. Fail safe
  5. Flow meter
30
Q

***What are shrader valves & what component of the AGM do they belong?

A
  • part of the supply system

- “quick connects” where machine connects & disconnects from wall gases

31
Q

What are the concerns of the concept of supply

A
  • How gases & electrical power come into the AGM

- What are the likely faults & hazards (Naglehout p. 245)

32
Q

What 2 things are included with “Supply”

A

Pipeline & cylinders

33
Q

**Supply of gases pipeline source includes….

A
  • The primary gas source
  • DISS (Diameter index safety system) pipeline connector
  • Pipeline check valve (prevents gas from leaking)
  • Pipeline gauges
34
Q

***What equipments are part of the pipeline

A
  1. Wall outlets
  2. Connecting valves & holes
  3. Filters & check valves
  4. Pressure gauges
35
Q

Parts of the Cylinder

A
  1. hanger yokes, (Yoke block)
  2. filters & check valves
  3. Pressure gauge
  4. pressure regulator
36
Q

What is a hanger yoke

A

part that allows cylinder tank to orient to machine

Principles Exam III (2 decks)

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