Anesthesi circuits and ventilators Flashcards
What are the different types of anesthesia breathing circuits? (4)
Open
Semi-open
Semi-closed
Closed
This is the method by which the first true anesthetics were given. A bit of cloth saturated with ether or chloroform was held over the patient’s face. The patient breathed the vapors and became anesthetized.
Open
Semi-open examples (6)
Mapleson A-F
Parts common in a semi-closed circuit (3)
1) Fresh gas
2) Corrugated tubing
3) Pop-off valve
Advantage of a semi-closed circuit
1) Simple
2) Can change anesthesia depth rapidly
3) Portable
4) Lack of rebreathing
Disadvantage
1) Lack of conservation of heat & moisture
2) Limited scavenging
3) High FGF
Parts of a semi-closed system
1) Inspiratory limb
2) Expiratory limb
3) Unidirectional valves
4) CO2 absorber
5) Reservoir bag,
6) Pop-off valve (expiratory limb)
The prototypical semiclosed circuit is the?
Circle system
Advantage of circle system (3)
1) Conserves heat
2) Low FGF
3) Can scavenge
Disadvantage of a circle system (1)
1) Multiple connections and can cause disconnections
Rank the Mapleson circuits in order of efficiency for controlled
(Dog Bites Can Ache)
Controlled: D > B > C > A
Rank the Mapleson circuits in order of efficiency for spontaneous
(All Dogs Can Bite)
Spontaneous: A > D > C > B
What circuit is most commonly used in anesthesia delivery systems today?
Circle syste,
Soda lime is the most common absorber, and at most can absorb ____ L of CO2 per 100 g of absorbent.
23
Factors affecting efficiency of absorption include (3)
1) Size of the canister
2) Size of absorbent granule
3) Channeling
