System Overview
26
Instructions for Use Fabius MRI SW 3.n
APL Valve
The APL valve has two functions. It limits the max-
imum pressure during manual ventilation. It also
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 ManSpont mode or ventilator over-
ride condition.
The APL valve has a labeled knob for selecting
between spontaneous and manual modes of venti-
lation and for indicating approximate pressure set-
tings.
– When the APL valve knob is rotated fully coun-
terclockwise, pressure is released for spontane-
ous ventilation. Spontaneous ventilation
automatically eliminates resistance to patient
exhalation.
– In manual mode, the APL valve knob can be
rotated to change the pressure threshold at
which gas will flow through the valve and into
the scavenging system. Clockwise rotation of
the APL valve knob increases the pressure
threshold, and counterclockwise rotation of the
APL valve knob decreases the pressure thresh-
old. Lifting the top of the APL valve knob will
temporarily relieve pressure.
WARNING
Risk of patient injury
Route all lines/cables away from the APL
valve to prevent interference with the APL
valve adjustment knob. Lines/cables caught
underneath the APL valve adjustment knob
could interfere with proper functioning of this
valve.
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