Chapter 6 - Operation Summary Typical Operation
74 Apollo Operator’s Manual
Part Number: 90 38 237, 6th edition
Entering the Patient’s Ideal Body Weight
(optional)
The patient’s ideal body weight is the actual weight
minus estimated excess fat. The entered ideal body
weight influences the ventilator default settings for
tidal volume (V
T) and frequency (Freq), as well as
the alarm limits for expiratory minute volume (M
V)
during operation.
The patient ideal body weight parameter is available
in the Standby screen as well as in all ventilation
modes. Changing the patient’s ideal body weight
parameter during operation does not change the
actual parameters described above.
1. Press the >Weight< button on the Standby
screen (3 in Figure 54).
2. Turn the confirm knob until the correct weight is
displayed, and press the knob to confirm.
Setting Fresh-Gas Flow
Set the fresh-gas flow to desired levels using the flow
control knobs on the front panel of the machine.
SORC (Sensitive Oxygen Ratio Controller)
The Apollo is equipped with an O2 minimum delivery
system to avoid hypoxic gas mixtures when N
2O is
selected as the carrier gas. At flow rates of 200 mL/
min and above, the N
2
O concentration can be freely
set between 0 and 79%.
During an O
2
shortage, the SORC limits the N
2
O
concentration in the fresh gas, so that the O
2
concentration does not fall below 21%. When the
N
2
O flow control is open and the O
2
flow control is
closed (or O
2
flow is less than 200 mL/min), the
SORC prevents N
2
O flow. During N
2
O failure, O
2
can
still be administered.
The SORC is not active when air is selected as the
carrier gas and 100% air can be metered throughout
the entire flow range.
CAUTION !
Accumulation of metabolic products may occur during
low flow anesthesia, therefore monitoring of oxygen
concentration is mandatory. Flushing the circuit with
fresh gas at regular intervals may be necessary,
particularly if decreasing oxygen concentrations are
measured.
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