MIETHKE M.blue Mode D'emploi page 23

M.blue
®
M.blue is equipped with a feedback mecha-
nism. If targeted pressure is exerted on the
valve, an acoustic signal (a clicking sound) is
audible, or a resistance can be felt to give, as
soon as the rotor brake has been released due
to the valve housing design. In other words
the valve shows both acoustically and hapti-
cally when the pressure is sufficient for uncou-
pling of the brake. Once this pressure has been
released the rotor is adjustment-proof again.
Although the click caused by releasing the rotor
brake is easily audible before implantation, this
can be considerably reduced after implantation.
This can be due to the CSF filling the valve,
its position and the condition of the implants
surroundings. Normally, however, it should be
audible to the patients themselves or through
the use of a stethoscope.
Adjustment with the
M.blue plus Adjustment Assistant
Alternatively, the M.blue plus Adjustment Assis-
tant can be used to adjust the opening pres-
sure. To do this, insert the M.blue plus Adjust-
ment Assistant into the adjustment ring aligned
to the desired value and press it with your index
finger (fig. 15).
Fig. 15: M.blue plus Adjustment Assistant
WARNING
When adjusting, please ensure that the open-
ing pressure is changed by a maximum of 16
cmH O per adjustment process; otherwise
2
errors may result.
Example: The opening pressure is to be
changed from 6 to 36 cmH
method is an adjustment in two stages: Initial
adjustment from 6 to 22 cmH
quently from 22 to 36 cmH
O. The correct
2
O and subse-
2
O.
2
INSTRUCTIONS FOR USE | EN
CAUTION
The M.blue plus Adjustment Ring emits a
magnetic field. Metallic objects and mag-
netic storage media should be placed at a
sufficient safety distance.
4. Checking after adjustment
After adjusting the valve opening pressure, it
is recommended to check the selected open-
ing pressure. To do this, please proceed as in
Points 1 and 2. If the measured pressure does
not agree with the required pressure stage the
adjustment process should be repeated. To do
this, please start at Point 3 again. Adjustment
can be made difficult by swelling of the skin
for a few days after the operation! If checking
the valve setting is not 100% possible using the
M.blue plus Compass, we recommend carrying
out a check using an imaging method.
M.blue Checkmate
The M.blue Checkmate is supplied sterile and
can be re-sterilised. With the M.blue Check-
mate it is possible to carry out a pressure level
change and the check before and during valve
implantation directly on M.blue. To determine
the pressure level the M.blue Checkmate is
placed centrally on M.blue. The M.blue Check-
mate automatically aligns itself over the valve.
The pressure stage can be read off from the
catheter in the proximal (leading to valve) direc-
tion. If the pressure level is supposed to be
adjusted, the M.blue Checkmate is placed cen-
trally on M.blue. When doing so, the required
pressure stage must point towards the proximal
catheter (leading to valve). If the M.blue adjust-
ment gyroscope is now pressed lightly onto the
valve, the rotor brake in M.blue is released and
the pressure level is set. When adjusting, please
ensure that the opening pressure is changed
by a maximum of 16 cmH
process otherwise errors can result (see Chap-
ter "3. Adjustment process").
0297
O per adjustment
2
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