Integra LifeSciences CODMAN HAKIM Precision Fixed Pressure Valves Mode D'emploi page 17

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. The device is now ready for the SIPHONGUARD Device Functional Test
or the Manometer Test.
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 Functional Test
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 CODMAN HAKIM
Valve and SIPHONGUARD Device (Figure A-3).
Figure A-3
Note: Attach the distal catheter at this time, flushed free of
air bubbles.
3.
Bring the end of the distal catheter level with the fluid level in the
manometer (Figure A-4).
Note: The CODMAN HAKIM Valves with SIPHONGUARD Device must
lie on a sterile surface and remain undisturbed for the duration of
the test.
Figure A-4
4. Hold the catheter distal tip adjacent to the manometer and slowly lower
the end of the distal catheter until the fluid level in the manometer
begins to drop.
5. Continue to lower the catheter tip 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.
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