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B-701417-00 Rev D
21
Figure 16: Flow Control Knob Set for 2 L/min
Note: Do not set the flow above the flow rate prescribed by
your physician. Do not attempt to set the flow control
between settings. Oxygen will flow from the unit only when
the flow control is set to one of its marked settings.
For Companion 550 Only
Set the continuous/demand flow switch for the desired oxygen delivery
— continuous oxygen flow or flow only during the inhalation part of each
breath (Figure 17).
Figure 17: Continuous/Demand Flow Switch
When using the Companion 550 in the demand flow mode, oxygen
delivery occurs when the unit senses your inhalation effort. You may
notice an initial “puff” of oxygen followed by oxygen flow during the
remainder of the inhalation. No oxygen flow occurs when you exhale.
When the unit is set for the continuous flow mode, oxygen flows during
the entire breathing cycle.
Summary of Contents for Companion Series
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