Principles I (Summer 2025) > Exam 2 - Mapleson Breathing Systems (Quick Tool) > Flashcards

Exam 2 - Mapleson Breathing Systems (Quick Tool) Flashcards

(37 cards)

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1
Q

What are the 5 major components of Mapleson system?

A
  1. Reservoir bag
  2. Unilateral Corrugated tubing
  3. APL valve
  4. Fresh gas inlet
  5. Patient connection
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2
Q

What 3 components are missing from Mapleson system?

A
  1. CO2 absorber
  2. Unidirectional Valves
  3. Separate inspiratory & expiratory limbs (tubing is unilateral)
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3
Q

What are other names for Mapleson circuits (2)?

A
  1. Carbon Dioxide washout circuits
  2. Flow-controlled Breathing Systems
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4
Q

Standard diameter of corrugated breathing tube on Mapleson system?
- Significance?
- What additional function can corrugated tubing potentially have during ventilation because of this?

A
  • 22 mm
  • Creates low resistance pathway for gases
  • Also acts as potential reservoir for gases
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5
Q

Fill in blank: To minimize FGF requirements for Mapleson system, the volume of the breathing circuit must be _______ or ________ the _______.

A
  • greater than or equal to tidal volume (TV)
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6
Q

Other names for APL valve?

A
  • Pop-Off valve; Pressure Relief valve
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7
Q

Fill in blank: If gas inflow is greater than patient’s uptake and _______ uptake, the high pressure causes the APL to __________.

A
  • circuit
  • OPEN
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8
Q

T/F: APL is partially open during spontaneous ventilation

A
  • False
  • APL is fully open during spontaneous breathing
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9
Q

APL orientation during assisted ventilation:

A
  • Partially closed
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10
Q

APL orientation @ 0 cmH20:

A

Valve is open

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11
Q

Pop-Off valve pressure when considered fully closed?

A

70 cmH20

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12
Q

Which Mapleson component generates positive pressure ventilation?

A
  • Reservoir Bag
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13
Q

Which Mapleson(s) do not contain APL valves?

A

Mapleson E & Mapleson F

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14
Q

What is the expected effect with no APL valve present?

A

Less likely for excessive pressure to occur

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15
Q

Which component determines the type of Mapleson performance and classification?

A

The POSITION of the Fresh Gas Inlet

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16
Q
  • Identify where FGF enters circuit
  • Identify Mapleson system type & other name
Study These Flashcards
A
  • A: FGF enters near reservoir bag (opposite of pt)
  • Mapleson A (MAgill’s)
17
Q
  • Identify location of APL valve on Mapleson A
Study These Flashcards
A
  • D: Located near the patient side
18
Q
  • Magill’s system is most efficient for _________ ventilation.
  • When would you most likely us this system?
Study These Flashcards
A
  • Spontaneous
  • Transport
19
Q

Explain why Mapleson A is the worst choice for controlled ventilation?

Study These Flashcards
A
  • Rebreathing will occur during controlled ventilation unless MV greater than or = 20 L/min (FGF very high (3x MV) & unpredictable)

MV = minute ventilation

20
Q

To prevent rebreathing, ______ must be greater than or equal to MV

Study These Flashcards
A
  • FGF

Rebreathing depends on FGF

21
Q

Order the direction of fresh gas flow during spontaneous inspiration on Mapleson A system.

Study These Flashcards
A
  1. FGF inlet
  2. circuit
  3. APL
  4. patient
22
Q
  • Identify where FGF enters system
  • Identify Mapleson system type & other name
  • Locate APL
  • What components are missing?
Study These Flashcards
A
  1. B (FGF enters near patient)
  2. Mapleson E (also called Ayre’s T-Piece)
  3. There’s no APL valve
  4. APL & Reservoir Bag

“Ayre was Extubated to a T-Piece”

23
Q

In Mapleson E, corrugated tubing attached to the T-piece forms the ______.

24
Q

Mapleson E indicated for what type of patients?
- Why?

Study These Flashcards
A
  • Spontaneous breathing
  • No reservoir bag so unable to ventilate for patient
25
Per lecture, what can you add to a Mapleson E to allow assisted ventilation?
- 15 to 22 mm adapter in between T-piece and reservoir
26
- Identify Mapleson system type. - How do you prevent rebreathing? - What component(s) are missing? - Indication
1. Mapleson **C** 2. **FGF has to be 2x MV** 3. No corrugated tubing 4. Emergency Resiscitation (**C** for **C**rash cart) ## Footnote FGF inlet is b/w reservoir & APL
27
- Identify Mapleson system type & other name. - How do you prevent rebreathing? - The degree of rebreathing influenced by method of _____________. - What component is missing? - Indication
- Mapleson **F** (**Jackson** Rees) - modified Arye's T-piece (E) - FGF has to be **2 - 2.5x** greater than MV - method of **Ventilation** - No APL valve - Mainly pedis ## Footnote " **Jackson Five** "
28
What makes Mapleson E differ from Jackson Reese? -Significance
- Jackson Reese (Mapleson F) has reservoir bag - **Allows provider to switch between spontaneous and assisted ventilation**
29
- Identify Mapleson system type. - How do you prevent rebreathing? - Indication
- Mapleson B - **FGF has to be 2x MV** during spontaneous & controlled ventilation ## Footnote **FGF inlet & APL near patient on Mapleson B & C**
30
What is the disadvantage of FGF & APL being close to each other on patient side of system?
- Fresh gas vented on **exhalation** through APL= ineffecient ## Footnote obsolete- not used
31
- Identify Mapleson system type. - Describe 3-way T-piece set up of system. - How do you prevent rebreathing? - _____ valves can be added
- Mapleson **D** - 3- way T-piece: Pt connection, FG inlet, & corrugated tubing - FGF must be 2 - 2.5x MV - PEEP valves ## Footnote **Only mapleson that FGF inlet is near pt side & APL near reservoir bag**
32
Mapleson D is the most efficient system for _________ ventilation.
**controlled**
33
- Name for modified Mapleson D. - Describe modification
- Bain - **Inner coaxial tubing for FGF** (inspiratory FG hose inside expiratory coruggated limb; tube within tube)
34
What can occur if the inner inspiratory FG hose is kinked in Bain ciruit?
- **Will convert the outer expiratory hose to dead space**
35
Benefit of Bain coaxial tubing setup?
- **reduces temp loss (conserves warmth/ moisture)**
36
Most common Mapleson systems (in order)?
B → D → F
37
Summary of Anesthesia Breathing systems

Principles I (Summer 2025) (11 decks)

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