Understanding Anesthesia Equipment Flashcards
what does the delivery circuit help with?
prevents escape of gas
supports breathing for patient
reuse anesthesia and oxygen
something to remove CO2
what is the purpose of the anesthesia machine?
administer a specific amount of inhalant to get desired effect without killing the patient
make use of anesthetics somewhat predictable
what is used to reduce the pressure of oxygen coming out of gas cylinders?
regulators
how can oxygen go through the anesthesia machine?
through a flowmeter
through a flush valve
where does gas in the common gas outlet come from?
vaporizer or flush valve
what are the two options for getting from the common gas outlet to the patient?
rebreathing (circle) system
non-rebreathing system
what does the breathing bag allow?
you to breathe for patient or give patient a breath
does the length of the Y piece change the dead space?
no
in a rebreathing system, where is excess pressure exhaled?
through waste gas outlet
what is the bag size based on?
smallest bag that can hold 6 patient tidal volumes
how is CO2 removed in a non-rebreather?
oxygen flow
in whom is a non-rebreather used?
patients 2.5 kgs and under
what is the oxygen flow in a rebreather?
20-30 ml/kg/min
where do scavenge systems attach?
pop-off valve
how do absorbents remove CO2?
chemical reaction that generates heat
why must an active scavenge system have a buffer?
to prevent negative pressure being applied to the lungs of the patient
what percentage does isoflurane vapor start at?
32%
what is the pressure in gas cylinders?
2000 PSI for oxygen
what do regulators reduce the pressure of oxygen coming out of the cylinder to?
50-60 PSI
can the flush valve deliver anesthetic?
no: bypasses flowmeter and vaporizer
does the length of the Y piece change the amount of dead space?
no
what is one tidal volume?
10 ml/kg
who are non-rebreather systems used for?
patients 2.5 kg or less
is the volume of the non-rebreather system large or small?
small
what is the oxygen flow in a non-rebreather?
180-300 ml/kg/min
minimum: 500 ml/min
what is the oxygen flow in a rebreather?
20-30 ml/kg/min
how does excess waste gas leave?
pop-off valve
