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Anesthesia&Surgery > Parts Of The Anesthetic Machine > Flashcards

Parts Of The Anesthetic Machine Flashcards

0
Q

Oxygen is given at a controlled rate measured in _____?

A

L/min

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1
Q

What is the purpose of the anesthetic machine?

A

A liquid inhalant is vaporized into a carrier gas, and delivered to the patient via a breathing circuit

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2
Q

Isoflurane is converted to a gas and given at a specific _________

A

Percentage

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3
Q

Gases exhaled from the patient are _______

A

Scavenged or Re-circulated once CO2 has been removed

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4
Q

What does the scavenging system dispose of?

A

Excess and waste anesthetic gases

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5
Q

What are the parts of the compressed gas supply?

A

Gas tanks
Pressure gauges
Pressure reducing valves
Flow meter

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6
Q

What are the components of the anesthetic machine?

A

Compressed Gas Supply
Anesthetic Vaporizer
Breathing Circuit
Scavenging System

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7
Q

Where is the anesthetic vaporizer located?

A

Near the fresh gas outlet

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8
Q

Parts of the breathing circuit

A 
Unidirectional valves
Breathing tubes
Reservoir bag
Pop-off valve
CO2 canister
Pressure manometer
Negative pressure relief valve
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9
Q

What is the most commonly used carrier gas

A

Oxygen is the most commonly used carrier gas

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10
Q

What pressure is the oxygen compressed to

A

The oxygen tank can be compressed up to 2200 psi

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11
Q

“E” tanks hold how many L of oxygen?

A

“E” tanks hold 660 L of oxygen

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12
Q

“H” tanks hold how many L of oxygen?

A

“H” tanks hold 6900 L of oxygen

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13
Q

Are “E” tanks attached to the anesthesia machine?

A

Yes

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14
Q

Are “H” tanks attached to the anesthesia machine?

A

No

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15
Q

What color is an oxygen tank?

A

Green

White in Canada

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16
Q

What color is a nitrous oxide tank?

A

Blue

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17
Q

What color is a carbon dioxide tank?

A

Gray

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18
Q

How are “E” tanks/cylinders attached to the machine?

A

Attached via a Yoke

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19
Q

How are “H” tanks/cylinders attached to the machine?

A

Attached via hoses or pipes

20
Q

Yokes are gas ______

A

Specific

21
Q

What is the yoke connected to to control the amount of gas released?

A

The yoke is connected to a Pressure Regulator to control the amount of gas released

22
Q

How many pins does an oxygen yoke have below the outlet port?

A

An oxygen yoke has 2 pins below the outlet port

23
Q

What does a Tank Pressure Gauge display?

A

A Tank Pressure Gauge displays the pressure of oxygen currently in the tank

24
Q

When does a Tank Pressure Gauge display the pressure?

A

Only displays pressure when the tank is open/on

25
Q

Only open the oxygen tank once it has been connected to this

A

Only open the tank once it has been connected to a yoke

26
Q

When does the Tank Pressure Gauge read zero?

A

Reads zero when tank is empty and when tank is turned off/closed

27
Q

What should you turn on and check before every anesthetic procedure?

A

Turn on O2 and check this gauge before every anesthetic procedure

28
Q

When should you replace an O2 tank with a new one?

A

Replace with new tank when the pressure is 100 psi

29
Q

The refill line is at this psi

A

The refill line is at 500 psi (red zone)

30
Q

How do you calculate the total volume of oxygen left in your tank in Liters?

A

Multiply the psi by 0.3 for E tanks and 3 for H tanks

31
Q

How can you tell how much time you have left until the tank is empty?

A

Divide the total volume of oxygen (330 L) by the flow rate you are using (1 L/min).
330/1= 330 min
330/60= 5 1/2 hrs

32
Q

What gas does an E cylinder contain?

A

Nitrous oxide

33
Q

How much psi does a full E cylinder contain?

A

A full E cylinder contains 760 psi

34
Q

In what form is nitrous oxide present inside the tank?

A

Nitrous oxide is present in liquid and gas forms inside the tank

35
Q

Why does the Pressure Reducing Valve regulate?

A

The Pressure Reducing Valve regulates the pressure of the gas leaving the tank to flow through the lines, into the flow meter of the anesthesia machine.

36
Q

What does the Pressure Reducing Valve reduce?

A

Reduces the pressure of oxygen that leaves the tank at 2200 psi to a safer 40-50 psi

37
Q

To what does the Pressure Reducing Valve reduce the psi of oxygen leaving the tank (at 2200 psi)?

A

Reduces the pressure to a safer 40-50 psi

38
Q

What can a Pressure Reducing Valve be measured with?

A

The Pressure Reducing Valve can be measured with a line pressure gauge

39
Q

What does the Flow Meter allow the anesthetist to do?

A

Allows the anesthetist to adjust the flow rate of oxygen traveling through the machine

40
Q

What does the flow meter reduce the psi to?

A

Flow meter reduces psi from 50 psi to 15 psi

41
Q

Oxygen (or anesthetic gas) does not reach the patient unless this is turned on

A

Oxygen (and anesthetic gas) does not reach the patient unless the Flow Meter is turned on

42
Q

How is the flow rate of oxygen measured?

A

Measured in liters per minute by a ball (flow meter)

43
Q

How do you know how to choose a breathing system for a patient?

A

Non-Rebreathing : 15 lbs or >7 kg

44
Q

How do you know which rebreathing system, red or blue, to choose for your patient?

A

Red: “Pediatric” 15-35 lbs
Blue: “Adult” over 35 lbs

45
Q

How do you calculate which reservoir bag size your patient needs?

A

Kg x 60mg divided by 1,000mg= size of bag in ml

46
Q

How do you calculate the oxygen flow rate?

A

Non-Rebreathing: 250ml/kg/min

Rebreathing: 40ml/kg/min

47
Q

How do you calculate how much time the O2 tank has left?

A

Psi x 0.3= L of O2

L of O2 divided by patient O2 rate equals time left

Anesthesia&Surgery (13 decks)

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