System Components
36 Instructions for Use Apollo SW 4.5n
Part Number: 9053586, 3rd edition
APL valve
The APL valve has two functions. It limits the
maximum pressure during manual ventilation and
exhausts excess gas into the scavenger system
during manual and spontaneous ventilation.
The APL valve is connected to the patient airway
through the ventilator. It functions only when the
ventilator is in Manual/Spontaneous mode.
The adjustment knob (1 in Figure 4) is used to select
between spontaneous and manual modes of
ventilation. It’s labeled to indicated approximate
pressure settings.
Figure 4. APL ValveFor spontaneous ventilation:
Pressure is released for spontaneous ventilation
when the adjustment knob is rotated fully
counterclockwise, when the index mark on the knob
lines up with the index mark on the bottom of the APL
valve (2 in Figure 4). Spontaneous ventilation
eliminates both resistance to patient exhalation and
the need to readjust back pressure.
For manual ventilation:
In manual mode, the APL valve adjustment knob can
be rotated to change the approximate pressure at
which gas will flow through the valve and into the
scavenging system. Clockwise rotation of the
adjustment knob increases the pressure, and
counterclockwise rotation of the adjustment knob
decreases the pressure. Pulling up on the APL valve
head will temporarily relieve pressure.
Note: The APL valve is automatically excluded
from the breathing circuit whenever an
automatic ventilation mode is selected. It is
suggested that even in automatic ventilation,
the APL valve is adjusted to a pressure that
is safe for the patient.
WARNING!
Risk of patient injury
If the APL valve becomes blocked due to e.g.,
lines or cables being caught under the valve
head, the patient may be endangered.
Route all cables away from the APL valve; do
not hang lines, hoses or cables, e.g. the sample
line, on or near the APL valve.
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