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Anesthesia MM/TL > The OR environment and anesthesia machine > Flashcards

The OR environment and anesthesia machine Flashcards

1
Q

How many liters of oxygen are in a tank?

A

660 L

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2
Q

What is the total pressure of 1 oxygen tank?

A

2200 psig

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3
Q

How do you determine the residual nitrous oxide in a tank?

A

Weigh the cylinder

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4
Q

What is the equation for how long a cylinder is going to last?

A

Total liters/ rate = minutes

Example:

330L tank / rate of 3L/min = 110 minutes

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5
Q

How much time do you have with a full tank of oxygen going at 10L/min before it runs out?

A

66 minutes

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6
Q

What is the importance of Wood’s metal?

A

It is a metallurgic alloy that has a low melting point so it allows dissipation of pressure to keep bottles of gas from bursting due to heat

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7
Q

At what pressure is the pressure relief valve designed to burst?

A

3300 psig

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8
Q

What is psig?

A

Pounds per square inch

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9
Q

What is th critical temp of nitrous oxide?

A

36.5 Celsius

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10
Q

Why can it be kept at room temperature as a liquid?

A

Because room temperature is below its critical temperature

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11
Q

How can gases be liquefied by pressure?

A

Only if store below their critical temperature

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12
Q

What is the pressure of a nitrous oxide tank?

A

745 psig

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13
Q

What will happen to nitrous oxide if kept at a constant temp?

A

It will vaporize at a steady rate and maintain a constant pressure until liquid is gone

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14
Q

Why is nitrous oxide cold?

A

Because energy is lost in the conversion of liquid to gas in the form of heat

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15
Q

What is the color of the medical vacuum receptacles

A

Black with white lettering

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16
Q

What is the color of the WAGD receptacles

A

Lavender

17
Q

How is crossover prevented in cylinders of gas?

A

The pin index safety system

18
Q

Which gases have am interchangeable pin?

A

Oxygen and CO2

19
Q

What color is the nitrogen tank?

A

Black

20
Q

What color is the nitrous oxide tank?

A

Blue

21
Q

What makes sure there is no wrong connections to the anesthesia machine?

A

Pin index safety system

22
Q

When is the PISS defeated?

A

By multiple washers between the cylinder and the yoke
Or if yoke pins are damaged
Or if cylinder is filled with the wrong gas

23
Q

What should the humidity of the room be at?

A

50-55%

24
Q

What does dry air do?

A

Facilitates the movement of particulate matter - airborne stuff!

25
Q

What does humid air do?

A

Decreases integrity of barrier devices

Anesthesia MM/TL (36 decks)

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