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*Breathing system
*Breathing system
[[Image:anaesthetic machine.jpg|right|thumb|125px|<small><center>Anesthetic Machine</center></small>]]
[[Image:anaesthetic machine.jpg|right|thumb|125px|<small><center>Anaesthetic Machine</center></small>]]
==Gas supply==
==Gas supply==
Pressure gauges indicate the pressure of gas in the pipeline of cylinders. Depending on the age of the machine they may be found above the cylinder yoke, or on the front panel of the machine. They are colour-coded and calibrated for each gas/vapour. While this oxygen gauge measures the pressure within the cylinder, which is directly related to the contents of the cylinder, the nitrous oxide gauge measures the saturated vapour pressure of the gaseous nitrous oxide and so does not indicate the fullness of the cylinder, and will only start to show a drop in pressure as the liquid nitrous is running low.
Pressure gauges indicate the pressure of gas in the pipeline of cylinders. Depending on the age of the machine they may be found above the cylinder yoke, or on the front panel of the machine. They are colour-coded and calibrated for each gas/vapour. While this oxygen gauge measures the pressure within the cylinder, which is directly related to the contents of the cylinder, the nitrous oxide gauge measures the saturated vapour pressure of the gaseous nitrous oxide and so does not indicate the fullness of the cylinder, and will only start to show a drop in pressure as the liquid nitrous is running low.
[[Image:pressure gauge.jpg|right|thumb|125px|<small><center>Pressure Gauge</center></small>]]
==Pressure Reducing Valves==
==Pressure Reducing Valves==
Flowmeters are supported along with the vapourisers and some other components on the backbar of anaesthetic machines.
Flowmeters are supported along with the vapourisers and some other components on the backbar of anaesthetic machines.
[[Image:Flowmeter.jpg|right|thumb|125px|<small><center>Flowmeters</center></small>]]
The emergency oxygen flush receives oxygen directly from the oxygen source and thereby bypassing the vapouriser. It delivers oxygen at a high flowrate and so care should be taken when used e.g. should never be used when connected to a patient.
The emergency oxygen flush receives oxygen directly from the oxygen source and thereby bypassing the vapouriser. It delivers oxygen at a high flowrate and so care should be taken when used e.g. should never be used when connected to a patient.
[[Image:Oxygen Flush.jpg|right|thumb|125px|<small><center>Oxygen Flush</center></small>]]
==Oxygen Failure Alarm==
==Oxygen Failure Alarm==