Integra Codman CERTAS Plus Manual Del Usario página 26

EN – ENGLISH
4 . Position the valve vertically with the outlet pointed downward.
5 . Using the syringe, gently flush saline through the system
while gently pressing the reservoir to purge air bubbles from
the valve assembly. Once fluid begins flowing through the
valve mechanism, the outlet of the valve can be pointed
upward to further assist in evacuating air from the system.
Note: An excessive flow rate (>0.75 mL/min) activates
SIPHONGUARD and creates the impression that the valve is
distally occluded. In reality, flow is being diverted to the high
resistance secondary pathway.
6 . Once all air has been removed from the valve, submerge the
valve completely in the water bath. For valves with a distal
catheter, submerge the end of the catheter in the water bath
to obtain accurate results. Confirm that there are no bubbles
attached to the end of the distal catheter and that the water
bath does not obstruct the end of the catheter.
7 . Adjust the stopcock to connect the syringe to the manometer
(see Figure A-6) and refill the manometer to a height equal to
the operating pressure of the next highest setting above the
valve setting being tested, or to 60 cmH
Setting 8. Refer to Table 1 for operating pressure specifications.
8 . Turn the stopcock to connect the manometer to the valve
(see Figure A-7).
9 . The water column in the manometer will start to fall. Allow
the water column to drop for 2 minutes and then read the
resultant pressure.
Note: For valves with distal catheter and/or SIPHONGUARD,
an extended test time is recommended in order to
compensate for the possibility of a decreased flow rate due
to the additional catheter resistance and/or SIPHONGUARD
activation. Allow the water column to drop for 4 minutes and
then read the resultant pressure.
Test Results
The resultant closing pressure may be compared to the table
below.
Note: Variations in the manometer closing pressure test result
are possible based upon the test conditions and the test method
utilized.
Valve Setting
1
2
3
4
5
6
7
8
2
Minimum Closing Pressure
(mmH
0 mmH
0 mmH
30 mmH
55 mmH
80 mmH
105 mmH
140 mmH
300 mmH
14
O if one is testing
O)
2
O
2
O
2
O
2
O
2
O
2
O
2
O
2
O
2