PATIENT CIRCUITS
D-6 www.zoll.com 906-0731-01-05 Rev. C
If the exhalation valve is not performing, manually ventilate the patient and perform the
following procedure:
1. Using a hemostat or a tongue blade, carefully open the exhalation valve as we show in the
following illustration. Remove the top cover first, and then remove the silicon diaphragm.
Place the silicon diaphragm in a clean area.
Figure D-3 Removing Silicon Diaphragm-- Pediatric/Adult Patient Circuit
2. Examine the silicon diaphragm for kinks, cuts, holes, or inconsistencies in the material.
If the diaphragm is kinked, relax the silicone diaphragm with your fingers, ensuring that
there are no longer any kinks (this usually takes a few seconds).
If the diaphragm has a hole or cuts, replace the patient Circuit.
Figure D-4 Examining the Patient Circuit’s Silicone Diaphragm
3. Carefully re-seat the silicone diaphragm in the exhalation valve seat. Tap around the silicone
diaphragm lightly to ensure that kinks do not develop when closing the exhalation valve.
4. Locate the top of the exhalation valve, taking care not to touch the silicone diaphragm. Ensure
that the barbed end with tubing is pointing into the FLOW direction. Apply enough pressure
to snap the exhalation valve cover in place.
Examine both sides
of Silicone Diaphragm
Relax silicone with
opposing pressure
Silicone Diaphragm
should be free of any
kinks or deformities
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