ANESTHETIC MACHINES. The primary function of any anesthetic machine is to deliver a precise amount of oxygen and volatile anesthetic under controlled conditions to patients undergoing general anesthesia. ANESTHETIC MACHINE Oxygen is be delivered at a controlled rate
3) Gases exhaled from the patient are disposed of OR re-circulated (after removing the CO2)
REMEMBER: You can also use an anesthesia machine to deliver oxygen to a patient in distress. DON’T turn the vaporizer on! You do not want to anesthetize these patients!
Can be broken down into 4 parts:
is tipped over (usually the
whole machine), turn the
vaporizer off and run oxygen
only through the machine for
15 minutes to flush it out.
- reverse atelectasis if present
-removal of CO2 and anesthetic that builds up when respirations have decreased in volume
-assist or control ventilation – esp if in respiratory arrest
Gases that don’t exit the machine via the pop off valve go into the CO2 canister and are then returned to the patient
CO2 canister usually contains soda lime that removes CO2 from other gases breathed out.
“Exhaused” soda lime granules no longer absorb CO2.
HOW DO I KNOW WHEN THE GRANULES ARE EXHAUSTED?
Color change to violet, off-white or pink depending on the brand. Based on pH.
CO2 saturated granules are hard and brittle, new ones can be chipped and crumbled
Once color becomes abnormal, it is possible that it changes back to normal within hours