Breathing Circuits Flashcards

1
Q

What are examples of an open circuit?

A

NO rebreathing and NO reservoir:

Insufflation
Nasal Cannula
Open drop
Simple Mask

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2
Q

What are examples of a semi-open circuit?

A

NO rebreathing WITH a resevoir:

Mapleson Circuit
Circle Circuit (if FGF > Mv)

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3
Q

What are examples of a semi-closed circuit?

A

PARTIAL rebreathing WITH a resevoir:

Circle system with FGF < Mv)

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4
Q

What are examples of a closed circuit?

A

FULL rebreathing WITH a resevoir:

Circle system when FGF is very low and the APL is closed

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5
Q

What are two common system malfunctions that increase CO2 rebreathing?

A
  1. Exhausted scrubber
  2. Incompetent Unidirectional Valves
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6
Q

Which Mapleson circuit is best for spontaneous ventilation?

A

Mapleson A

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7
Q

Which Mapleson circuit is worst for spontaneous ventilation?

A

Mapleson B

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8
Q

Which Mapleson circuit is best for controlled ventilation?

A

Mapleson D

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9
Q

Which Mapleson circuit is worst for controlled ventilation?

A

Mapleson A

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10
Q

Unlike circle systems, Mapleson circuits do not have:

A

Unidirectional Valves
CO2 absorbers

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11
Q

ALL Mapleson circuits are ________

A

semi-open (non-rebreathing) circuits

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12
Q

Where is the APL valve located in Mapleson A and D circuits:

A

A: APL is by the Airway
D: APL is by the Drugs

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13
Q

Where is the fresh gas inlet in Mapleson A and D circuits?

A

A: Near the bag
D: Near the patient

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14
Q

Mapleson A circuits are the only circuits that:

A

have the FGF next to the bag

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15
Q

The Mapleson D is the only circuit with:

A

the APL valve away from the patient

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16
Q

What are the advantages of Mapleson circuits?

A
17
Q

What are the disadvantages of Mapleson circuits?

A
18
Q

What FGF is required to prevent rebreathing with a Mapleson circuit?

A

Generally 2.5x the Mv

19
Q

What is the Bain system?

A

A modified Mapleson D

20
Q
A

Mapleson A

21
Q
A

Mapleson B

22
Q
A

Mapleson C

23
Q
A

Mapleson D

24
Q
A

Mapleson E
(Ayre’s T Piece)

25
Q
A

Mapleson F
(Jackson Reese)

26
Q

The Jackson Reese is also known as the:

A

Mapleson F

27
Q

The resistance to gas flow through the anesthesia circuit is:

A

Less than 1 cmH2o per liter per minute

Less than half what it is for normal breathing

28
Q

what is the internal volume of the typical adult anesthesia circuit?

A

400-500ml

29
Q

What is the max amount of CO2 that can be absorbed by 100g of absorbent?

A

26L for every 100g of absorbent

30
Q

By weight, what is the primary component of soda lime?

A

Calcium hydroxide

31
Q
A