A7™ Operating Instructions 046-004667-00 3 - 11
System Interface Fresh Gas Flow Display
Select an O
2
flow button or the balance gas flow button to open Direct Flow Control menu (see
FIGURE 3-17).
FIGURE 3-17 Direct Flow Control Menu
You can make the following settings in Direct Flow Control menu:
•Set O
2
flow of 100% O
2
using the Quick Keys.
•Set Balance Gas to AIR, N
2
O or None.
• Set the flow value of balance gas via soft keyboard.
•Set the O
2
flow value via soft keyboard.
•Set the Fresh Gas Control to Total Flow (software bundle version 02.09.00 and later).
•Set the Flow Pause to On (software bundle version 02.09.00 and later).
3.3.1.3 Fresh Gas Flow Optimizer® (software bundle version 02.09.00
and later)
The OPTIMIZER® indicates an efficient range of fresh gas delivered to the patient, and the efficient area
is defined as a range with a lower bound of "Fresh Gas Consumption" and an upper bound of "Fresh
Gas Consumption + 1 L/min".
Fresh gas consumption of the subject A7 depends on:
• the uptake by the patient,
•leakage,
• the CO2 volume converted in the absorber.
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