WorksheetsBreathing Systems Quiz
Total questions: 44
Worksheet time: 22mins
What happens to the exhaled air in a rebreathing system?
It is expelled into the environment
It is converted into oxygen
It is breathed back in
It is stored for later use
What is one of the advantages of rebreathing in anaesthesia for large patients?
Higher flow rates
More environmental contamination
More heat loss
Low flow rates so more economical
Which of the following is a disadvantage of rebreathing?
Less heat loss
Takes time to alter concentration of anaesthetic vapour
Less environmental contamination
More economical in large patients
What is a disadvantage of the CO2 absorbent and valves used in rebreathing systems?
They decrease resistance
They are less expensive
They increase resistance
They require less maintenance
Why might rebreathing systems be considered expensive?
They use low flow rates
They require less understanding of the system
They often require more maintenance
They result in more heat loss
Which of the following is not a type of non-rebreathing system?
T-piece
Bain
Lack
Circle
Is CO₂ absorbent needed in non-rebreathing systems?
Yes, it is always needed
No, it is not needed
Yes, but only in certain types
It depends on the patient
What is one of the advantages of non-rebreathing systems?
High gas flow rates
Rapid adjustment of inhaled concentration
Increased environmental contamination
Significant heat loss
Which of the following is a disadvantage of non-rebreathing systems?
Easy to use
Cheap
Potential for inadvertent rebreathing if RR too high
Minimal circuit resistance
What does APL stand for in medical terminology?
Adjustable Pressure Limiting Valve
Automatic Pressure Lever Valve
Advanced Pressure Level Valve
Adjustable Pain Limiting Valve
What is the function of the APL Valve?
Controls the temperature of the gas in the reservoir bag
Controls the amount of gas contained within the reservoir bag and how much is lost into the scavenging system
Measures the pressure of the gas in the reservoir bag
Filters impurities from the gas before it enters the reservoir bag
What is the Inspiratory Arm in medical terminology?
Tube running from patient to machine
Tube running from machine to patient
Tube used for blood transfusions
Tube used for administering medication
What does the Expiratory Arm refer to in medical terminology?
Tube running from machine to patient
Tube used for administering medication
Tube running from patient to machine or scavenging
Tube used for blood transfusions
What does a Coaxial System refer to in terms of circuit design?
A) A system where the 2 arms of the circuit are separated by an insulator
B) A system where the 2 arms of the circuit run one inside the other
C) A system where the 2 arms of the circuit are connected at one end only
D) A system where the 2 arms of the circuit are not connected at all
How are the arms arranged in a Parallel System?
A) The 2 arms run one inside the other
B) The 2 arms run in a twisted configuration
C) The 2 arms run side by side
D) The 2 arms are connected at both ends
What is a feature of the Ayres T-Piece with Jackson Rees Modification?
It has no reservoir and no scavenging
It has a reservoir and a scavenging opening from the end of the bag
It has an added valve and the bag twists
It is suitable for patients over 8kg
For which weight category is the Ayres T-Piece suitable?
Patients weighing <8kg
Patients weighing >8kg
Patients weighing <5kg
Patients weighing >10kg
What is the circuit factor range for the Ayres T-Piece?
1.5-2.0
2.0-2.5
2.5-3.0
3.0-3.5
What is one of the advantages of using an Ayres T-Piece?
It has a complex structure
It requires valves to operate
It allows for monitoring of respiration through bag movement
It has a high deadspace
Which of the following is a disadvantage of the Ayres T-Piece?
It is bulky and expensive
Scavenging may be difficult
It has minimal deadspace
It is not compact
What does the Magill circuit consist of?
Reservoir by fresh gas outlet, scavenging by patient
Reservoir by fresh gas inlet, scavenging by patient
Reservoir by used gas inlet, scavenging by machine
Reservoir by fresh gas inlet, scavenging by machine
For which patient weight is the Magill circuit suitable?
>5kg
>10kg
>15kg
>20kg
What is the circuit factor for the Magill circuit?
0.5-1.0
1-1.5
1.5-2.0
2-2.5
Why might the Magill circuit not be suitable for head surgery?
It is too simple
The location of the APL valve is inconvenient for head surgery and monitoring
It has a low resistance and deadspace
It is too easy to maintain
What is a disadvantage related to resistance and deadspace in the Magill circuit?
It has minimal resistance and deadspace
It has considerable resistance and deadspace
It is too complex to use
It is not simple enough
What are the characteristics of the Bain circuit?
Coaxial and Parallel, works differently
Coaxial and Non-parallel, works the same
Coaxial and Parallel, but work the same
Non-coaxial and Parallel, but work differently
What does the Bain circuit consist of?
Fresh gas flow down centre, bag and scavenging on inspiratory limb
Fresh gas flow up centre, bag and scavenging on expiratory limb
Fresh gas flow down centre, bag and scavenging on expiratory limb
No fresh gas flow, bag and scavenging on expiratory limb
For which patient weight is the Bain circuit suitable?
>15kg
<15kg
>50kg
<50kg
What is the circuit factor for the Bain circuit?
1.5-2 (lower for smaller patients)
2.5-3 (higher for smaller patients)
2-2.5 (higher for larger patients)
3-3.5 (lower for larger patients)
Which of the following is a disadvantage of the Bain system?
Facilitates scavenging
Can use IPPV – close valve, breathe, open valve
High gas requirement
Low dead space and resistance
What happens if the inner tube of the Bain system gets disconnected?
Low dead space and resistance
Facilitates scavenging
Can use IPPV – close valve, breathe, open valve
Whole circuit becomes dead space
How does the Bain system facilitate the use of IPPV?
High pressure may damage lungs
High gas requirement
Close valve, breathe, open valve
If inner tube disconnected whole circuit becomes dead space
For what patient weight is the system described under "Lack" suitable?
>5kg
>10kg
>15kg
>20kg
What is the circuit factor range for the system described under "Lack"?
0.5-1.0
1-1.5
1.5-2.0
2-2.5
What is the Mini-Lack anaesthetic circuit suitable for?
Patients weighing more than 10kg
Prolonged IPPV
Patients weighing less than 10kg
Adult patients only
What is a disadvantage of the Mini-Lack anaesthetic circuit?
It is too complex to set up
It can be used for prolonged IPPV
It cannot be used for prolonged IPPV
It has no inspiratory limb with bag
What does the Mini-Lack anaesthetic circuit consist of?
Expiratory limb with bag; inspiratory limb with valve
Inspiratory limb with bag; expiratory limb with valve
Inspiratory limb with valve only
Expiratory limb with valve only
What is the circuit factor for the Mini-Lack anaesthetic circuit?
0.5-1.0
1-1.5
1.5-2.0
2-2.5
What is the Humphrey ADE circuit compared to in terms of usage?
Only as a Circle
Only as a Parallel Bain
Like a Parallel Bain, an Ayres T, or as a Circle
It is not comparable to any other circuits
Why is the Humphrey ADE circuit considered very flexible?
Because it is easy to maintain
Because it is commonly used in veterinary practice
Because it depends on how the valves are set up
Because it is less complex than other circuits
What type of valve is present in the inspiratory limb of a Circle system?
Multidirectional valve
Bidirectional valve
Unidirectional valve
No valve
What is the purpose of the absorbent canister in a Circle system?
To provide oxygen
To scrub CO2
To measure pressure
To control temperature
For what patient weight is the Circle system suitable?
>5kg
>10kg
>15kg
>20kg
What is the circuit factor for a Circle system?
10ml/kg/min
20ml/kg/min
There is a specific circuit factor
None, just use 10ml/kg/min
