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8
2.3 Circuit
Depending on the ventilation mode prescribed by your physician, you will
be using one of the following:
• Single circuit
• Single circuit with expiratory valve
• Double circuit
To determine the type of circuit prescribed for you and how to connect
it to the device, see “Connecting the circuit” on page 12.
2.4 Accessories
Other components in your circuit system may include an antibacterial
filter, a humidification system and a water trap. For further details, read
the instructions provided with the individual accessories used in your
system.
Some ResMed accessories are available as optional extras with this
device:
• An external battery
• An oxygen coupling for connecting a supplemental flow of oxygen
to the device
• A remote alarm (accessory not described in this manual).