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Flashcards in Equipment (Anesthesia machine) Deck (54):
1

the anesthesia consist of 3 pressure systems.

what are they? and whatvare their pressures?

High- cylinder pressure

Intermediate- 45 psi

Low- 16 psi

2

what does the High pressure system consist of?

  • Cylinder pressure gauge (bourdon)
  • Hanger yoke (PISS)
  • hanger yoke check valves
  • Cylinder pressure regulators (ist stage reguator)

3

what doe sthe intermediate pressure system consist of?

  • Flush Valve
  • Second stage regulator
  • oxygen pressure "fail-safe"  shut off valve
  • pipelines inlets/ check valves/ pressure gauges
  • DISS
  • Flow meter valves 

 

 

4

what does the low pressure system consist of?

  • Vaporizers
  • comon gas outlet
  • flow meter tube
  • check valves

5

what supplies gas to the high pressure system?

cylinders

6

What supplies gas to the intermediate pressure system?

 

Hospital wall pressure (55psi) or cylinder pressure after 1st stage regulator

 

 

7

what supplies gas to the low pressure system?

flow after the 2nd stage regulator

8

a picture to help visualize

 

9

also go to brainscape and utilize the ones i made for Pabs class

technology

10

what are the valves in the anesthesia gas machine?

  1. Free floating
  2. ball and spring
  3. Diaphragm

11

describe all you can about the "free floating" valves.

  • moves in direction being pushed by gas
  • found in DISS and hanger yoke systems
  • primary goal- to prevent gas from leaking out of the system
  • Ex- a pressureized system from the cylinder will push these valves closed to prevent gases from escaping or leaking out of the system.

12

picture of free floating valve

 

13

explain everthing you now about a ball and spring valve.

  • YOU supply the energy
  • Function is to permit gas flow after you have made a connection (such as plugging the gas lines into the wall)
  • can all "ALL or NONE" -b/c its hooked up and working or not
  • ex- the oxygen flush valve- when you push it O2 comes out when you let go it stops
  • basically anywhere there is a connection

 

 

14

picture of ball and spring when open (pushed)

 

15

Picture of ball and spring closed

 

16

explain everything you can about the diaphragm valve

  • there are ONLY 2
  • The first and 2nd stage regulators
  • These valves REDUCE pressure
  • 1st stage regulator takes cylinder pressure and decreases it to 45 psi 
  • The 2nd stage regulator reduces hospital pressure to 16 psi

17

What is the DISS?

Where is it located?

What is it for?

What type of valves are they?

What in the DISS system prevents cylinder gas from escaping the machine through the pipeline suply hose?

  • Diameter Index Safety system
  • On back of anesthesia machine
  • Gas hoses
  • Ball and spring (push on quick connectors- you supply the energy)
  • The check valve ( Free floating valve)

18

Picture of DISS 

 

19

side question

what is the first and only place that dectects if crossover of gases occur?

O2 analyzer

(next is the pulseox)

20

Oxygen flush valve:

oxygen is delivered to the pt at what rate?

35-75 L/min

21

Oxygen flush valve:

Is it high/intermediate/or low pressure system

Intermediate

22

Oxygen flush valve:

is it pressurized at what psig from the wall or cylinder?

40-50 psig

23

Oxygen flush valve:

What type of valve is it? and how do u know?

ball and spring

you supply the energy

24

Oxygen flush valve:

what is a potential complication of using it

May cause barotrauma

25

 Hanger yoke:

uses what safety sytem?

PISS

26

WHat is the PISS

PIn Index Safety System

27

What are the PISS for each Gas?

  • Air- 1,5 
  • Oxygen 2,5
  • Nitrous 3,5

How to remeber 

  • All end in 5
  • Oxygen (O2) has 2 moleules 
  • Nitrous (N2O) has 3 molecules

28

Single Hanger yoke:

what type of cylinders fit into it?

E

29

Single Hanger yoke:

What type of valve is the hanger yoke valve? and how do you know?

Free floating valve

Opens with pressure and closes with pressure

30

Single Hanger yoke:

What is the purpose of the Hanger yoke valve?

Prevents a full cylinder from emptying into an empty cylinder or wall oxygen from entering a cylinder

31

Single Hanger yoke:

picture

 

32

Double Hanger yoke:

Picture

 

33

what is the name of the gauge that shows oxygen tank pressure?

Bourdon

34

You have a dual hanger yoke with 2 oxygen E cylinders. Both E cylinders are turned on; which one will supply the gas machine?

the one with the higher pressure

35

The bourden gauge shows a pressure of 825psig what does this mean

There is 825 psig (pressure) from the oxygen E cylinder

36

In a dual hanger yoke system what prevents one cylinder from emptying into the other?

The FREE FLOATING VALVE 

37

Oxygen pressure sensor Valve:

what are its other names

pressure sensor shut off valve

Fail safe valve

38

Oxygen pressure sensor Valve:

what is its purpose

Prevents hypoxic mixtures

39

Oxygen pressure sensor Valve:

is it actually a sensor?

nope; it senses pressure 

40

Oxygen pressure sensor Valve:

explaint the valve in both the Ohmeda and Drager. (not too important which one does what just the principles of how they work)

  • Ohmeda
    • All or none
    • minimum 25 psi to open the valve 
  • Drager
    • Varible flow porportioning system
    • 1/2 O2 can give 1/2 N20 etc

41

Oxygen pressure sensor Valve:

where in the Oxygen pressure sensor Valve do gasses mix?

There is no mixing of gasses here

42

Oxygen pressure sensor Valve:

Picture of it open

 

43

Oxygen pressure sensor Valve:

Picture of it closed

 

44

Oxygen pressure sensor Valve:

senses O2 pressure of what?

50psi

45

Oxygen pressure sensor Valve:

What does the valve shut off if the O2 presure falls?

N2O

46

Oxygen pressure sensor Valve:

O2 pressure must maintain at least what psi to keep valve open

25psi

47

Oxygen pressure sensor Valve:

What type of valve 

ball and spring

48

Oxygen pressure sensor Valve:

it senses _______ only, not flow delivery 

Pressure

(oxygen pressure to be precise)

49

APL valve:

what is its purpose?

Adjust the limit of pressure in teh patient circuit and rebreathing bag

50

APL valve:

tightening the valve does what to the pressure

Increases it

51

APL valve:

it is attached to what check valve

Exhalation

52

What delivery system problems may cause hypercabia

  • Apnea
  • Inadequate MV
  • Increased Deadspace in apparatus
  • Missing unidirectional valve
  • Incorectly assembled circuit
  • Exhausted carbon dioxide absorbant
  • Inadequate fresh gas flow

53

what delivery system problems may cause hypoxia

  • empty O2 cylinder
  • Incorrect cylinder
  • closed O2 cylinder valve
  • Oxygen flow meter off
  • Oxygen leak
  • incompetent or absent unidirectional valves
  • inadequate ventilation

54

you are a molecule of O2 in an E cylinder. Identify your path to the intubated pt. Identify how you are moving, any valves you pass through, and any prressure changes

  • E cylinder
  • open cylinder valve
  • hanger yoke system
  • opens free floating valve of this E cylinder and simultaneously closes the free floating valve of the other hanging yoke system AND activates the Bourden Gauge to read cylinder pressure
  • Goes to first stage regulator (diaphragm valve) reducing pressure to intermediate (45psi) and simultaneously to the following
    • Oxygen pressure sensor valve
    • Flush valve
    • DISS (closes free floating valve- prevents gas from exiting the gas machine)
    • Second stage regulator (converts to low pressure 16psi
  • to gas flow manifold (flow meters)
  • Vaporizers
  • Common gas outlet
  • Down through soda lime container
  • Inspiratory valve
  • Inspiratory limb of circuit
  • endotracheal tube/ pts lips