Clinical Anaesthetic Machines & Equipment Flashcards
(41 cards)
What is the purpose of anaesthetic machines?
to deliver anaesthetic gases/vapours and oxygen to the patient
What does the oxygen flush do?
Pure Oxygen comes out when used, comes through common gas outlet as the anaesthetic agent
- delivers pure oxygen
What is the purpose of the oxygen flush button?
to quickly flush all anaesthetic agent OUT OF THE SYSTEM
What is an oxygen concentrator/generator?
filters air & concentrates air
Creates up to 95% Oxygen through a concentrator
What does a pressure gauge do?
measures pressure of gas in cylinder or pipeline
What is the pipeline pressure?
400-500 kPa (4-5 Bar)
In Europe, how much pressure is in a new cylinder?
137 BAR/13,700 kPa
What does the regulator/reducing valve do?
- reduces pressure of gas in cylinder to a level suitable for the patient
- regulates pressure & keeps it constant
- allows fine and accurate control of gas flow
What does a flowmeter do?
measures gas flow in litres per minute
flowmeters are specifically calibrated for…
the density & viscosity of each gas
Each gas MUST have its own
flowmeter
The bobbin in a flowmeter floats on a
column of gas
What does a vaporiser do?
allows controlled vaporisation of volatile agents
Vaporisers MUST NOT BE…
TILTED! (by greater than 15 degs)
What should you do if you tilt a vaporiser more than 15 degrees?
Flush it properly, do NOT attach to patient!
Each anaesthetic agent vaporiser has a different way of filling so…
you cannot accidentally mix the gases inside the same vaporiser
When do you use the oxygen flush button?
in emergencies only to flush all anaesthetic out of the system
Why do you need to use the oxygen flush button w/ extreme caution?
it will rapidly overinflate the lungs of your patient and cause barotrauma
if you need to push the flush button, what is the proper way of doing it while there is a patient undergoing an anaesthetic procedure?
- disconnect p
- cap end of system
- flush into the scavenging system
- reconnect into system
- turn off anaesthetic agent
- P now only receives O2
Why should you never use the O2 flush to fill the reservoir bag?
Can easily lead to pneumothorax
How fast does the rate of O2 flush through the system?
35 L/min (600 ml/sec)
What is the common gas outlet?
For connection of breathing systems
When attaching to the common gas outlet, what is important to do to secure it?
“Push & Twist” to lock it in so that it does not disconnect from system
What gas(es) come out at the outlet?
Oxygen +/- anaesthetic agent
