Transcript ANESTHESIA MACHINE

Non-Rebreathing System
Used
for patients weighing < 7 kg
Attach
the clear, plastic hose to the fresh gas
inlet (this tube comes from the vaporizer outlet
port)
Flow
of gas differs from rebreathing circuit now!
Fresh
gas goes directly to the patient
Exhaled
gas comes directly out through a
separate hose and goes into a reservoir bag
or sent through another tube to be scavenged
Non-Rebreathing System
Benefit:
•
Less parts = less resistance
•
Smaller animals need this feature!
Negative:
•
Higher amount of oxygen used due to patient
not-rebreathing any gas
•
Patient is only breathing cool, dry fresh gas
•
Warm, moist exhaled gases don’t meet
Non-rebreathing Systems
Norman Mask Elbow
Jackson-Rees
Non-rebreathing Systems
Bain coaxial
Ayre’s T-Piece
•
Does not have a
reservoir bag
http://asevet.com/resources/circuits/index.htm
Oxygen Flow Rates
Non-rebreathing
system: 250 ml/kg/min
 High
b/c removal of CO2 is dependent on flow in the
system
 Can
go up to 600 ml/kg/min!
Note: An inadequate fresh gas supply will result in your
patient re-breathing gases…remember, there is no CO2
absorber!
Things to Consider
Which
breathing system may help keep a patient
from becoming hypothermic?
Which
Which
breathing system is more costly to use?
breathing system allows for the quickest
change in anesthetic depth?