Inhalation Anesthesia & Anesthetic Breathing Systems Flashcards
This is to provide oxygen & remove CO2
— deliver amounts of anesthetic agents
— assisted or controlled ventilation to patients
anesthetic breathing circuit
Examples of breathing circuits:
- Chamber & Mask induction
- Rebreathing circuit
- Non-rebreathing circuit
Classification of breathing circuit
— airtight jars or chambers
— useful for small animals
— uses anesthetic soaked in cotton
chamber induction
Classification of breathing circuit
— useful in cats & dogs that are less than 8kg
— mask is on the side of the face
— mask is removed when sufficient depth of anesthesia is achieved
mask induction
This circuit has a
— unidirectional valve to avoid mixing of gases
— patient “rebreaths” its own exhaled gas
— removes CO2 & adds a certain amount of fresh O2 & anesthetics
— depends of the fresh gas flow (FGF) rate
— economical
rebreathing circuit
a unidirectional flow
circle system
bi-directional flow; drawback is fresh gas could escape too
To and Fro system
“partial rebreathing”
— some exhaled gas remain in the system & some gas exit thru the pop-off valve
needs high fresh gas flow (FGF) rate
semi-closed system
This breathing circuit
— has little or no exhaled gass return to the patient
— no CO2 canister (straight instrument)
— requires high FGF rate
— non economical
non-rebreathing system
this is highly flammable gas with pressure exceeding 40 psi at 70F
compressed gas
compressed gas that is a movable tank
E tank
compressed gas that is requires a permanent space
H tank
compressed gas cylinder sizes
A-H
medical gas cylinder usually used (2)
- E tank
- H tank
This intubation should only be attempted when the animal is unconscious (has 4 planes)
endotracheal intubation
