AGM Need to Know Flashcards by Hannah Garrison

What AACN standard is pertinent to the anesthesia gas machine?

Standard 6

How well did you know this?

Not at all

Perfectly

When does the anesthesia gas machine check need to be completed?

every morning without fail, abbreviated check between cases

How well did you know this?

Not at all

Perfectly

What does SPDD stand for?

Supply, Processing, Delivery, Disposal

How well did you know this?

Not at all

Perfectly

Why are some gases stored as liquids instead of gases?

1 liter of liquid O2 is equal to 860 liters of gas so it also us to optimize space

How well did you know this?

Not at all

Perfectly

What is a floating valve?

a floating valve is a unidirectional valve in the circle system
it opens and closes with pressure and moves in direction of gas flow

How well did you know this?

Not at all

Perfectly

The critical temperature of gas determines

how it will be stored as a liquid or as a gas

O2 & air are stored as gases; nitrous oxide is stored as a liquid

How well did you know this?

Not at all

Perfectly

The pressure gauges on the front of the machine are also known as

Bourdon pressure gauges

How well did you know this?

Not at all

Perfectly

Describe the pin location for air, nitrous oxide, and oxygen for the pin index safety system

air: 1 & 5
Nitrous oxide: 3 & 5
Oxygen: 2 & 5

How well did you know this?

Not at all

Perfectly

What makes up Wood’s Metal?

Bismuth, lead, Tin, Cadmium
Wood’s metal is a safety mechanism where when certain temperatures are experienced in the OR, it will melt to prevent a tank from exploding

How well did you know this?

Not at all

Perfectly

The markings on the tank indicate (green, yellow & red)

green diamond- indicates its a non-flammable gas
yellow- oxidizer
red- flammable gas

How well did you know this?

Not at all

Perfectly

The federal food, drug, and cosmetic act is responsible for

regulating medical gases contained in cylinders

sets standard for potency/purity

How well did you know this?

Not at all

Perfectly

The Department of Transportation is responsible for

cylinder design, construction, testing, marking, handling, filling, transportation

How well did you know this?

Not at all

Perfectly

The Compressed Gas Association is responsible for

sets standards on safe practice

How well did you know this?

Not at all

Perfectly

The National Fire Protection Association is responsible for

location, construction, installation of bulk systems

How well did you know this?

Not at all

Perfectly

The critical temperature of nitrous oxide is

36.5 degrees C

How well did you know this?

Not at all

Perfectly

Name the color, pressure, capacity & pin position for oxygen

green, 1900 PSI, 660 L, pin position 2,5

How well did you know this?

Not at all

Perfectly

Name the color, pressure, capacity & pin position for nitrous oxide

blue, 745 PSI, 1590 L, pin position 3 & 5

How well did you know this?

Not at all

Perfectly

Name the color, pressure, capacity & pin position for air

yellow, 1900 PSI, 625 L, pin position 1 & 5

How well did you know this?

Not at all

Perfectly

Oxygen has critical temperature of

-118.8 degrees Celsius (below room temp.)

How well did you know this?

Not at all

Perfectly

Utilize Boyle’s Law to calculate how much time you have before having to change your tank

set up a proportion using P1V1=P2V2

How well did you know this?

Not at all

Perfectly

What is part of the high pressure system?

Exposed to cylinder pressure; hanger yoke, yoke block with check valves, cylinder pressure gauge and cylinder pressure regulators

How well did you know this?

Not at all

Perfectly

What is part of the intermediate pressure system?

exposed to pipeline pressure ~50 psi; includes pipeline inlets, check valves, pressure gauges, ventilator power inlet, oxygen pressure-failure devices, flowmeter valve, oxygen second stage regulator; flush valve

How well did you know this?

Not at all

Perfectly

What is part of the low pressure system?

distal to flowmeter needle valve; flowmeter tubes, vaporizers, check valves, common gas outlet

How well did you know this?

Not at all

Perfectly

Describe the purpose of the failsafe valve

The system is designed to prevent unintentional delivery of a single gas other than oxygen to the flow control valves but if adequate pressure remains in the system then the valve will remain open; if there’s a malalignment and it is not really oxygen, then it will allow the valve to remain open and deliver a gas that is not O2… fail safe, not fail proof

Safety mechanisms in relation to the flowmeters include:

color and touch coded (oxygen is fluted)

What laws are pertinent to the Thorpe tube?

Bernoulli, Pouiselle's, and Ohm's law

Vapor pressure increases

with temperature

List the vapor pressure of isoflurane

239 mmHg

List the vapor pressure of halothane

243 mmHg

List the vapor pressure of Enflurane

175 mmHg

List the vapor pressure of sevoflurane

170 mmHg

List the vapor pressure of desflurane

669 mmHg

When you add vaporized anesthetic agent

the total volume exiting the chamber is greater than the volume entering the chamber

When a certain volume of carrier gas flows from machine into vaporizing chamber over a certain period of time

that same volume of carrier gas exits the chamber over the same period of time

If a higher VP agent is placed in a vaporizer of a lower VP agent,

concentration of agent delivered will be HIGHER than dialed setting and vice versa

The Tec 6 vaporizer is

a gas/vapor blender; not variable bypass

The issue with desflurane is

it is boiling at room temperature; the Tec 6 vaporizer avoids the problem by heating desflurane above its boiling point

On the Tec 6 vaporizer, the internal battery is

alarm only; it has to be electrically powered in order to use; internal battery is for alarms only and will not support the heating element so if you lose power you have to change your volatile anesthetic

The warm-up (amber) light on the Tec 6 means

the machine is in warm-up mode and we cannot turn the control dial

The operational (green) light on the Tec 6 means

the vaporizer is functional

The no output (red) light on the Tec 6 means

the vaporizer can't add agent vapor to gas flow due to lack of agent, tilting, or malfunction

The low agent light on the Tec 6 means

<250 mL of agent in sump

The alarm battery low (amber) on the tec 6 means

low battery voltage- battery only powers alarms, not vaporizers

The five tasks that oxygen is responsible for includes

proceeds through flowmeter, supplies O2 flush valve, activates fail-safe mechanism, activates low oxygen pressure alarm, drives the ventilator

Describe an open circuit

An open circuit does not have a reservoir bag, does not permit rebreathing and examples include open drop, nasal cannula, or face masks

Describe a semi-open circuit.

A semi-open circuit includes a reservoir bag, does not allow rebreathing, and examples include nonrebreathing circle or circle at high FGF (>VE)

Describe a semi-closed circuit

A semi closed circuit includes a reservoir bag, allows for partial rebreathing, and an example is circle at low FGF (

Describe a closed circuit.

A closed circuit includes a reservoir bag, has complete rebreathing, and an example is circle (with pop-off valve [APL] closed)

What is the purpose of the APL valve?

The APL valve is used to regulate the pressure in the circuit during MANUAL ventilation; it is bypassed in mechanical ventilation mode (adjustable pressure limiting valve)

A ventilator hazard is the failure of

emergency O2 supply or the E-cylinder

Granule sizes includ

4 to 8 mesh which means there are 4 quarter inch openings per linear inch must compromise between resistance to airflow and surface area for absorptive capacity

In a nonrebreathing system or semi-open system,

we have to make sure fresh gas flow is high enough or you'll have rebreathing

Describe the Mapleson A circuit.

The Mapleson A circuit is a nonrebreathing if FGF> alveolar ventilation; the overflow valve opens during expiration when maximum pressure is reached Order as follows: FGF, bag, tubing, expiratory valve & mask

Describe the Mapleson B circuit.

The Mapleson B circuit includes fresh gas inlet and overflow valve closer together to the patient to decrease rebreathing; requires FGF 2-2.5x's minute ventilation bag, tubing, FGF, expiratory valve, bag mask

Describe the Mapleson C circuit.

Shorter expiratory limb than Mapleson B; requires FGF 2-2.5 x's minute ventilation Bag, tubing, FGF, expiratory valve, bag mask

Describe the Mapleson D circuit.

Fresh gas inlet and overflow valve opposite Mapleson A; requires FGF 2-3 x's minute ventilation bag, tubing, FGF, expiration valve, mask

Describe the Mapleson E circuit.

Valveless and bagless (basically a T-piece); expiratory limb must be > patient's tidal volume to prevent entrainment of room air; FGF 3x's minute ventilation to prevent hypercarbia No expiratory valve, NO bag Tubing, FGF, mask

Describe the Mapleson F circuit

Jackson-Rees modification of the Mapleson D; requires FGF 2-3x's minute ventilation; minimal dead space/low resistance when using controlled ventilation know the different characteristics of Mapleson A, B, C, D, & E expiratory valve, bag, tubing, FGF, mask