User Manual
7
A breathing circuit, shown in Figure 3–3, consists of:
•
Circuit tubing to deliver air from the device to your interface (e.g., mask)
•
A mask or other patient interface device to deliver the prescribed pressure to your nose or nose
and mouth, depending on which interface has been prescribed for you
•
An exhalation device to vent exhaled air from the circuit
Circuit
Tubing
Exhalation
Device
Patient
Interface
(Typical)
Circuit with Separate
Exhalation Device
Circuit
Tubing
Exhalation
Port
Patient
Interface
(Typical)
Circuit with Mask with
Integrated Exhalation Port
Flexible
Tubing
Connector
Mask's
Connector
Figure 3–3 Two Typical Breathing Circuits
NOTE:
Th
e exhalation port may be part of the mask or may be part of a separate exhalation device, but
is required to minimize the potential for CO
2
rebreathing.
Th
e system senses your breathing eff ort and changes pressure levels when you inhale and exhale depending
on the mode of operation.
WARNING:
Th
e device can operate on AC or DC power. Th
e DC power option is not intended as a
battery backup.
CAUTION:
When DC power is obtained from a vehicle battery, the device should not be used while
the vehicle’s engine is running.