Anesthesia Machine Flashcards
Where does the high pressure system begin and end?
begins at the cylinder and ends at the cylinder regulators
Where does the intermediate pressure system begin and end?
begins at the pipeline and ends at the flowmeter valves.
Where does the low pressure system begin and end?
begins at the flowmeter tubes and ends at the common gas outlet
When you connect a bulb to the common gas outlet and create negative pressure what type of leak test are you performing?
Low pressure leak test (negative pressure test)
The low pressure leak test is testing from what point in the anesthesia machine to what other point?
from the flowmeter valves to the common gas outlet
(this includes the entire low pressure system and the flowmeter valves which are the end of the intermediate pressure system)
How do you perform a high pressure leak test?
closing the APL valve, pressurizing the circuit, and observing the airway pressure gauge (pressure should remain constant)
During a high pressure leak test if the machine does NOT have a check valve what parts of the machine are being assessed (tested)?
the breathing circuit and the entire low pressure system
During a high pressure leak test if the machine does have a check valve what parts of the machine are being assessed (tested)?
the breathing circuit and the low pressure system up to the check valve (which would only be the common gas outlet part of the low pressure system)
(it does NOT assess for a leak between the check valve and the rest of the low pressure system which would be the the vaporizers and flowmeter tubes)
What are the 4 possible components of the low pressure system?
flowmeter tubes
vaporizers
check valve (if present)
common gas outlet
During the high pressure test if the machine has a check valve then what parts are not being tested that are being tested if the check valve is not present?
with a check valve in place the high pressure test DOES NOT assess the vaporizers and flowmeter tubes because these are upstream from the check valve if it is present.
What does SPDD model stand for?
Supply
Processing
Delivery
Disposal
in the SPDD model the breathing circuit would be which part?
Delivery
in the SPDD model the pipeline to the back of the anesthesia machine or cylinders would be which part?
Supply
in the SPDD model the inside the machine up to the common gas outlet (vaporizers) would be which part?
Processing
in the SPDD model the scavenging system would be which part?
Disposal
Name the five tasks of oxygen?
- 02 pressure failure alarm
- 02 pressure failure device (failsafe)
- 02 flowmeter
- 02 flush valve
- Ventilator drive gas
What type of ventilator does not require a drive gas?
Piston driven
Which safety system is in place to prevent inadvertent misconnections of the gas cylinders?
PISS
Which safety system is in place to prevent inadvertent misconnections of the gas hoses?
DISS
What is the 02 pressure in the cylinder vs upon entry into the intermediate system?
02 cylinder pressure = 1900 psi
02 pressure in the intermediate system = 50 psi
What is one thing that can bypass the PISS system (that you should never do)
two washers between the hanger yoke assembly (there should only be one washer)
PISS configuration for air, oxygen, and Nitrous
air = 1,5 oxygen = 2,5 nitrous = 3,5
What is pipeline pressure vs intermediate system pressure?
They are about the same 45-50psi for the gas hoses and 50 psi in the intermediate system
When are the only times that cylinders should be turned on?
when checking them during the machine check or in the event of pipeline failure. (They should never be left in the on position when not in use)