Manometer Testing - Codman CERTAS Plus Manual Del Usario

Note: An excessive flow rate (>0.75 mL/min)
activates the SIPHONGUARD Device and creates
the impression that the valve is distally occluded. In
reality, flow is being diverted to the high resistance
secondary pathway.
8. Attach a distal catheter to the valve and gently flush
saline through the system to ensure that the catheter
is purged of air.
9. The device is now ready for SIPHONGUARD Device
Test Procedure or Manometer Testing.
Note: All valves are susceptible to damage due to
excessive flow rate during testing. Take extreme care
when flushing a valve as damage can occur when
excessive flow rates are used. It is recommended to
use a flow rate of no greater than 0.5 mL/min.
SIPHONGUARD Device Test Procedure
Note: This procedure applies only to valves with an
integrated SIPHONGUARD Device.
Note: Perform this procedure immediately after
completing the flushing procedure. This procedure
is designed to provide visual confirmation of proper
functioning of the SIPHONGUARD Device.
1. Use a full syringe of saline solution attached to the
4-way stopcock to fill the manometer to the top.
2. Turn the stopcock to connect the manometer to the
valve and SIPHONGUARD Device (Figure A-3).
3. Bring the end of the distal catheter level with the fluid
level in the manometer (Figure A-4).
Note: The device must lie on a sterile surface and
remain undisturbed for the duration of the test.
4. Hold the distal end of the catheter adjacent to the
manometer and slowly lower the end of the catheter
until the fluid level in the manometer begins to drop.
5. Continue to lower the end of the catheter at a
rate that exceeds the drop rate of the fluid level
in the manometer. As you do so, you will note a
corresponding increase in the rate of descent of the
fluid level in the manometer.
6. A point will be reached where the rate of descent
of the fluid level in the manometer dramatically
decreases, but does NOT stop. This is the point at
which the SIPHONGUARD Device primary pathway
closes and flow diverts to the higher resistance
secondary pathway. This confirms proper functioning
of the SIPHONGUARD Device.
7. Repeat Steps 3 through 6 as necessary to reconfirm
SIPHONGUARD Device function.

Manometer Testing

Note: Performing a manometer test is not recommended
as this test is susceptible to environmental factors and
yields a result that is not physiologic in nature and for
which manufacturers do not specify performance ranges.
Equipment Required (use all sterile equipment, perform
testing under sterile conditions)
One sterile manometer, wide-bore (e.g. 3.5 mm),
graduated in mm (available in lengths from 38 to 60 cm)
One sterile 4-way stopcock
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