Post-Operative X-Ray Examination: Identification Of The Valve Model And Pressure Reading - Sophysa POLARIS SPV-SX Notice D'emploi

order to unlock the rotor, then return it to a position
centered in the Locator.
— Turn the Magnet slowly, until it passes the extreme
position the furthest away from the initial position (No.
1 or No. 5).
— Remove the Magnet vertically and insert the Compass
into the Locator in accordance with Step 4b.
If the adjustment is correctly performed, the Compass will
confirm that the extreme position has been reached.
If the Compass needle does not align exactly to this
operating pressure value (No. 1 or No. 5), slightly adjust
the orientation of the Locator (rotation) in order to align the
Compass needle on the corresponding mark.
If the needle has not moved at all, reattempt the adjustment
process after repeating the back and forth motion with the
Magnet.
This sequence also makes it possible to confirm that the
valve can be adjusted (unlocking and rotation of the rotor).
9.4.2.2. Setting the pressure (Step 6b)
Refer to §4 – Principle of the Polaris
Setting Instrument
Until the last adjustment (end of Step 7b), hold the Locator
firmly with one hand in the precise position defined in step
5b.
Remove the Compass and insert the Magnet into the
Locator with the green marker on the Magnet facing the
lowest or highest pressure reached in Step 5b.
Move the Magnet quickly back and forth along the axis of
the lowest or highest position in Step 5b. Then reposition it
correctly in the center of the Locator.
Turn the Magnet slowly in the other direction until the
new position chosen as the operating pressure for the
implanted valve is reached.
Remove the Magnet vertically from the Locator to ensure
effective re-locking of the valve rotor at the new operating
pressure position.
9.4.2.3. Verification of the pressure setting (Step 7b)
Refer to §4 – Principle of the Polaris
Reading Instrument
Verification is performed
accordance with the procedure described in Step 4b.
NOTE
Setting the selected operating pressure cannot always be
performed at the first attempt. It is possible that the
procedure will have to be repeated once or several times,
in order to ensure that the desired pressure setting is
obtained.
PRECAUTION
Adjusting the pressure using a Polaris
requires experience. If the user is not familiar with the use
of the kit, it is recommended that the pressure adjustment
be confirmed with an X-ray.
It is advisable to monitor the patient carefully for 24 hours
following any change in the valve operating pressure
setting.
14 – ENGLISH
®
Valve Adjustment-
®
Valve Adjustment -
using the Compass
®
adjustment kit
9.4.2.4. Recording the new operating pressure (Step
8b)
Note the pressure read in Step 7b on the Polaris
Identification Card (PC-SPV).
9.5. POST-OPERATIVE X-RAY EXAMINATION:
IDENTIFICATION OF THE VALVE MODEL AND
PRESSURE READING
NOTE
During the radiological examination orientate the patient so
that the ray source points perpendicularly onto the valve
body.
In this way identifying the valve by its radio-opaque point is
made easy.
The radio-opaque points to the left of the inlet connector
are used to identify the pressure range of the Polaris
valve: :
Number of radio-opaque points
Maximum operating pressure (mmH
NOTE
The pressure range of the implanted valve is shown on the
Patient Card, in the description of the valve model used.
F 9 – R
IGURE ADIOGRAPHIC IDENTIFICATION OF THE DIFFERENT
MODELS OF THE VALVE
in
It is easy to read the pressures on a radiological image
(Figure 10).
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Patient
one
zero two three
● ● ● ● ●
●
O) 140 200 300 400
2
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P .
OLARIS
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