Circuits Flashcards
Which Circuits are suitable for IPPV?
A) Ayres-T-piece
B) Bain
C) Coaxial Bain
D) Parralel lack
E) Mini Lack
F) Magill
G) Circle
H) Humphrey ADE
B) Bain
C) Coaxial Bain
F) Magill
G) Circle
H) Humphrey ADE
Which Circuits are NOT suitable for IPPV?
A) Ayres-T-piece
B) Bain
C) Coaxial Bain
D) Parralel lack
E) Mini Lack
F) Magill
G) Circle
H) Humphrey ADE
A) Ayres-T-piece
D) Parralel Lack
E) Mini Lack
Name the NON Re-breathing circuits
- (Jackson-Rees modified) Ayre’s T-piece
- Bain + Coaxial bain
- Magill
- Parrallel, Coaxial + Mini Lack
- Humphrey ADE
Name the Re-breathing circuits
- Circle
- Humphrey ADE
What are Mapleson breathing systems?
Anaesthetic circuits which:
1. Deliever oxygen + anasethetic agents
2. Eliminate CO2
5 ..
What do Mapleson breathing systems consist of?
(Equipment)
- FGF
- Reservoir bag
- Breathing tubes
- Expiratory valve
- Patient connection
How many types of Mapleson breathing systems are there?
&
What are they called?
There are 5.
* A
* B
* C
* D
* E
And, technically, there has been an ‘F’ added too, now! (Added later on by ‘Wills’)
What makes a Mapleson circuit A, B, C, D or E?
- Depends on the arrangement of the components
- A = spontaneous respiration
- D = controlled ventilation
- E + F = best for Neonates
What are Mapleson A circuits best used for?
Spontaneous respiration
What are Mapleson D circuits best used for?
Controlled ventilation
What are Mapleson E + F circuits best used for?
Neonates
7 …
What is a breathing system?
- An assembly of components, which connects a patient’s airway > anaesthetic machine
- Which controlls a composition of gas mixture, that is dispensed
- It delivers gas to the patient
- Removes expired gases
- Controls the temp + humidity of inspired mixture
- Allows spontaneous, controlled + assisted respiration
- Provides ports for gas sampling, airway pressure, flow + volume monitoring
What are the 11 characteristics of an ideal breathing system?
- Simple, safe + inexpensive
- Deliver intended inspired gas mixture
- Allows spontaneoous, controlled or assisted ventilation to all age groups
- Efficient + allow low FGF
- Protect px from Barotrauma
- Sturdy, compact + lightweight
- Easily removes waste gases
- Warming + humidification of inspired gases
- Effectively elminate CO2
- Low resistance; minimal length, max internal diameter + w/p sharp curves or sudden changes in diameter
- Minimal dead space
What is an APL valve?
APL = Adjustable Pressuree Limiting valve
- A 1-way, adjustable + spring-loaded valve that allows exhaled gases + FGF to leave the breathing system
- When pressure w/in the breathing system exceeds the valve’s opening pressure
- The spring should adjust the pressure, required to open it
What should a breathing system consist of?
- Large bore, corrugated tube made of plastic or rubber
- Corrugation to inc flexibility + resistance to kinking
- Clear, plastic for lightweight + low resistance
- That acts as a reservoir in certain systems
What is the Reservoir bag?
- A bag made of anti-static rubber or plastic
- Black = Anti-static
- Green = low charging material but won’t spark
- Accomdates FGF during expiration
- Act as a reservoir until next respiration
- Acts as a monitor of px’s ventilatory pattern
- Used to assist or control ventilation
- Most distensible part of the breathing system, protecting the px from excessive pressure
What is the basic idea of a Mapleson A system?
- Fresh gas enters near reservoir bag, away from patient end
- Tubing connects to reservoir bag near machine end > APL valve at patient end
What is this a classification of?
Mapleson A > F systems
Name the Circuit
Lack
(Mapleson A)
Name the Circuit
Bain
(Mapleson D)
Name the Circuit
FGF enters the right tube!
Ayre’s T-piece
What anaesthetic circuits an be used in patients < 10kg?
- Ayres T-piece
- Mini Lack
What anaesthetic circuits an be used in patients > 10kg?
- Bain + Coaxial bain
- Parallel Lack
- Magill
- Circle
