Post-Operative X-Ray Control: Identification Of The Valve Model And Pressure Reading - Sophysa Sophy Notice D'emploi

9.4.3.1. Orientation of the Locator – "Extreme
position" method (Step 5)
If a difference is observed between the pressure value read
in the previous step and the patient monitoring documents
(Patient Identification Card, X-ray films, etc.), or if the
Compass needle pointed between two positions, it is
recommended that the angular positioning of the Locator
in relation to the valve axis is refined. To do this, use the
"extreme position" method described below:
— Without moving the Locator remove the Compass,
align the mark on the Magnet on the pressure read to
insert the Magnet vertically in the Locator.
— Turn the Magnet until it just passes the extreme
position the furthest away (No. 1 or No. 8).
— Without moving the Locator, remove the Magnet
vertically.
— Place the Magnet at least 0.5 m from the valve.
— Insert the Compass into the Locator.
If the Locator is correctly oriented and if the adjustment
is correctly performed, the Compass will confirm that the
extreme position has been reached.
If the needle does not point to this extreme pressure value:
— Turn the Locator-Compass assembly until the needle
is perfectly aligned with the extreme pressure value
selected.
— If necessary recentre the axis in the target.
9.4.3.2. Setting the pressure (Step 6)
If necessary, refer to §4 for the description of the Setting
Instrument
Up to the last adjustment step (end of Step 7b), hold the
Locator firmly in position with one hand.
Remove the Compass memorising the pressure it
indicates. Insert the Magnet aligning the mark on the
memorised position.
Turn the Magnet until it reaches the position selected as
the new operating pressure for the valve.
NOTE
The design of the valve makes adjustment easier when it
is performed clockwise. Consequently, when the
orientation step has been performed on Position No.8 a
return to Position No.1 is recommended followed by setting
the desired pressure.
Confirm the adjustment by a brief press on the Magnet.
Remove the Magnet vertically.
9.4.3.3. Verification of the pressure setting (Step 7)
If necessary, refer to §4 for the description of the Reading
Instrument
Verification is performed
accordance with the procedure described in Step 4.
14 – ENGLISH
Locator
using the Compass
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.
Paragraph 9.8 is devoted to the description of measures to
be taken if adjustment is difficult.
PRECAUTION
Adjusting the pressure using a Sophy
requires experience. If the user is not familiar with the use
of the kit, it is then recommended that the pressure
adjustment made is checked with an X-ray.
9.4.3.4. Recording the new operating pressure (Step 8)
Record the pressure value read during verification (Step 7)
®
on the Sophy
SM8).
9.4.3.5. Monitoring after an adjustment
It is advisable to monitor the patient carefully for 24 hours
following any change in the valve operating pressure
setting.
9.5. POST-OPERATIVE X-RAY CONTROL:
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 SM8 Sophy
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 7 – R
IGURE ADIOGRAPHIC IDENTIFICATION OF THE DIFFERENT
MODELS OF THE
in
®
Patient Identification Card (NT120 or PC-
zero
O) 140
2
®
SM8 S
OPHY VALVE
adjustment kit
®
one two three
● ● ● ● ● ●
200 300 400
.