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store and delivers oxygen, vaporizes liquid anesthesia and mixes wiht oxygen, and removes exhaled gases

functions of the anesthesia gas machine

disposes exhaled gases


removes carbon dioxide

absorber canister

a green tank/white, compressed gas, has a pin index and pressure gauge

oxygen tank

used so only the correct sized cylinder will ft into the yoke

pin indexed

2200 psi

"E" cylinder holds-

indicates the psi present in a tank

pressure gauge

psi x .3 =

# liters of oxygen in tank

full oxygen tank has how many liters

2200 psi x .3 = 660 liters

this indicates how many liters/minutes of oxygen are flowing to the animal

oxygen flowmeter

100-200 psi

this is when you change oxygen tanks

a blue tank, not seen often, pressure gauge measures gas portion not liquid portion

nitrous oxide tank

18 #

full tank weighs

13 #

empty tank weighs

5 #

weigt f liquid/gas component

< 500 psi

change nitrous oxide tank

has a level window, fill port, measures the % of anesthesia gas mixed with the oxygen as it passes out


liquid--> vapor

oxygen flows by it

inorder for the vaporizer to work

oxygen flowmeter must be on

direct, indirect

types of vaporizers

very precise, adjusts for oxygen flowrate, fewer mistakes. (out of circuit)

Direct vaporizer

allows oxygen to by-pass vaporizer, oxygen goes to rebreathing bag then to the patient

oxygen flush valve

non-rebreathing, rebreathing

2 types of breathing circuits are

breathing circuit that doesn't rebreath gases (made for patients <15 #


a breathing circuit that constantly reuses oxygen and anesthetic gas, removes carbon dioxide ad recycles exhaled gases

rebreathing (circle systems)

capacity of 1-2 liters, stores gases, easier to breathe from reservoir, allows patient to be bagged, and respiratory monitoring

reservoir bag

endotracheal tube cuff not inflated properly, endotrach tube too small in diameter, tube not in trachea

decreased movement of bag

prevents atelectasis, flushes out CO2, use CPR, perform every 5 min during long procedures

bagging patient

If oxygen flow rate too high, or reservoir bag is too large, or pop off valve is not open enough then

bag is over filled

causes injury to lung alveoli

over fill of bag

If oxygen flow rate too low, oxygen tank empty, reservoir bag too small, pop off valve open too much then

under filled bag

one way valve

inhalation flutter valve/tubing and exhalation flutter valve/tubing

tubing that connects to the endotracheal tube


gives pressure relief to the system, allows waste gases to leave the system and enter the scavenger system, close to bag animal; then reopen

pop off valve

allows waste gases to leave the system and enter the scavenger system

pop off valve

contains soda lime, has a moisture relief valve

carbon dioxide absorber cannister

soda lime + carbone dioxide =

heat and color change to purple

on top of CO2 absorber, indicates pressure in airways and lungs

pressure manometer

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