Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Anesthesiology > Anesthetic Equipment > Flashcards

Anesthetic Equipment Flashcards

1
Q

List in order the 7 major parts of a vaporizer out of breathing circuit (VOC) amchine

A 
Source of medical gases (always O2, sometimes N2O)
Pressure reducing regulator
Variable flowmeter for each medical gas
Vaporizer
O2 flush
Patient breathing circuit
Waste gas scavenging interface
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the relative risk of waste anesthetic gas exposure causing abortion?

A

Low

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the relative risk of handholding animals for radiographs causing abortion?

A

Low

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the relative risk of exposure to zoonotic diseases/parasites causing abortion?

A

High

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the relative risk of excessive smoking and/or alcohol consumption during pregnancy causing abortion?

A

High

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the relative risk of recreational use of N2O during pregnancy causing abortion?

A

High

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the relative risk of exposure to chemotherapy agents causing abortion?

A

High

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

True or false. Exposure to trace amounts of waste anesthetic gases represents a significant risk to the pregnant veterinarian.

A

False

There is insufficient evidence that there is significant risk, but still take precautions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Describe an open breathing system

A

No reservoir
No rebreathing circuit
Low resistance to breathing
CO2 removal through dilution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Describe a semi-open non-rebreathing breathing system

A

There is a reservoir
No rebreathing circuit
Used for a patient < 5 kgs, which is why it is non-rebreathing
CO2 removal through dilution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Describe a semi-closed pediatric breathing system

A

There is a reservoir
Partial rebreathing circuit
Used for a patient 5-8 kg, so a circle rebreathing circuit-pediatric
CO2 removal through absorber

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Describe a semi-closed adult breathing system

A

There is a reservoir
Partial rebreathing circuit
Used for a patient > 8 kg, so circle rebreathing circuit-adult
CO2 removal through absorber

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Describe a closed breathing system

A

There is a reservoir
Complete rebreathing circuit
CO2 removal through absorber

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the gas flow requirements for Mapleson-type non-rebreathing circuits based upon?

A

Fresh gas flow rate is 1.5-3 times the minute volume

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How is CO2 removed in non-rebreathing circuits?

A

Increased oxygen flow pushes CO2 out of the non-rebreathing circuits (dilution)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the minimum oxygen flow requirement for circle rebreathing circuits based upon?

A

Minimum oxygen flow rate equals minute O2 consumption

It is based on metabolic oxygen rate

17
Q

How is CO2 removed in rebreathing circuits?

A

Calcium hydroxide + NaOH-KOH base chemical absorber, Soda Sorb

18
Q

How can you decrease the time constant for an anesthetic circuit?

A

Increase the flow rate at the same time you change the vaporizer setting

19
Q

What is the purpose of the flowmeter?

A

Precisely measures gas flow

20
Q

Your patient seems to be waking up 10 minutes after being connected to the gas anesthesia machine. What are some reasons for this?

A 
Anesthetic machine or breathing circuit leaks
Endotracheal cuff leak
Use of the oxygen flush valve
Insufficient fresh gas flow rate
CO2 rebreathing
Vaporizer off, not connected, or empty
Stuck or malfunctioning one-way valves in circle rebreathing circuit
Malfunctioning vaporizer
21
Q

Why would you use the oxygen flush valve?

A

To deliver a high flow of oxygen to the common gas outlet at intermediate pressure bypassing the flow meter and vaporizer
It is used to pressure check the system, decrease time constant of anesthetic circuit, to increase O2 concentration, and to lighten depth of anesthesia by flushing circuit of anesthetic gas

22
Q

Describe an alternative method to achieve the same thing as the oxygen flush valve

A

Increase the inflow rate and turn off vaporizer to washout anesthetic gases.

23
Q

What is the device that changes a high cylinder gas pressure to a constant lower working gas pressure

A

Regulator

24
Q

What factors would influence your choice between using a non-rebreathing patient breathing circuit and a rebreathing patient breathing circuit for any given patient?

A

The weight of the patient:
< 5 kg is non-rebreathing
5-8 kg is circle rebreathing, pediatric
> 8 kg is circle rebreathing, adult

25
Q

Why does the temperature of the anesthetic liquid fall as it is vaporized? Why is this important to vaporizer function?

A

Evaporative cooling occurs when liquids are converted into vapors. As the liquid cools, the amount of saturated anesthetic vapor will decrease over time. The significance of decreased saturated anesthetic vapor is that most inhalant anesthetics have saturated vapor pressures far exceeding the amount required for clinical anesthesia (i.e. isoflurane = 31.6% –> is 20x the MAC of 1.4% needed)

26
Q

The gas flow in a Mapleson D-type circuit connected to a spontaneously breathing three KG. cat is inadvertently decreased from one liter per minute to 100 ml/min. How will this effect the functioning of the circuit?

A

This flow rate may be too low to blow expired CO2 away, causing the patient to re-breathe CO2 and take in less Oxygen

27
Q

Your reservoir bag is continually becoming empty (every minute) and your partner suggests repeated filling with the oxygen flush. Do you foresee any potential problems with this?

A

Yes. Repeatedly filling it with oxygen flush will dilute out your inhalant anesthetic which may lead your patient to get too light or wake up. Instead check to see if flow rate is too low or flowmeter knob was turned off. Also check to see if there may be a system leak.

28
Q

What is the method to check out an anesthetic machine prior to use?

A

Turn on cylinder or connect to house gas lines
Evaluate high, intermediate, and low pressure areas of the anesthetic machine for leaks
Check patient breathing circuit for leaks
Occlude patient breathing circuit connection; close pop-off/APL valve
Inflate circuit with O2; use flush valve
Observe for leaks; circuit should hold pressure with <250 ml/min leak rate
Open circuit outflow valve and note that scavenger interface is not obstructed

29
Q

The CO2 absorber in a circle system is filled with what material?

A

Calcium hydroxide + NaOH-KOH base chemical absorber, Soda Sorb

30
Q

You wander into a room to pick out an anesthesia machine for a case. The absorbent granules are white, the same color as they were when the canister was first filled 3 months ago. Are the granules still good? Explain.

A

No, even though they are the same color they have been sitting in the canister for too long and should be changed. It is possible that they change color after the reaction with CO2 occurred and then turned back to white. They should be crushed tested

31
Q

Your patient is light, so you turn up the vaporizer. What else should you do to speed the rate of change in anesthetic vapor concentration?

A

Increase the inflow rate

Anesthesiology (27 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions