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Les langues disponibles
| InstructIons for use
GB
REadInG THE PRESSuRE SETTInG fROM
an X-Ray IMaGE
each
paediSHUNTASSISTANT/SHUNTASSI-
STANT is calibrated under conditions of strict
quality control. The paediSHUNTASSISTANT is
available with a pressure rating of 10 cmh
the SHUNTASSISTANT can be supplied with
the following pressure ratings:
Pressure rating (cmH
O)
Ring code
2
10 paediSHUNTASSISTANT
15 SHUNTASSISTANT
20 SHUNTASSISTANT
25 SHUNTASSISTANT
30 SHUNTASSISTANT
35 SHUNTASSISTANT
Post-operatively, the pressure rating selected
can be read from x-ray images.
The functioning of the paediSHUNTASSIS-
TANT/ SHUNTASSISTANT too, can be che-
cked through postoperative X-rays. radiogra-
phy performed with the patient in a horizontal
position should reveal the tantalum ball to be
situated at a slightly greater distance from the
ball seat than in radiography carried out with
the patient standing up.
a)
b)
Fig. 5:
a) X-ray image of the paediSHUNTASSISTANT
pressure setting10 cmH
O
2
b) X-ray image of the SHUNTASSISTANT
pressure setting 20 cmH
O
2
16
TuBE SySTEMS
The paediSHUNTASSISTANT/SHUNTASSI-
STANT is designed and built to ensure optimal
ventricular pressure when applied in conjunc-
tion with a supplementary conventional or ad-
O;
justable differential pressure valve. for connec-
2
tions, catheters with an internal diameter of 1.2
mm and an external diameter of 2.5 mm should
be used preferably. In any case, the catheter
must be carefully fixed to the valve connector
by means of a ligature. kinks in the catheters
should be avoided.
The provided catheters have virtually no effect
on the pressure-flow characteristics.
SuRGICal PROCEduRE
depending on the anatomic situation, it is re-
commended to implant the SHUNTASSISTANT
in the thoracic region. Because of growth is-
sues, the paediSHUNTASSISTANT should be
implanted retroauricularly and subcutaneously.
In any case, it has to be taken care that the
paediSHUNTASSISTANT/SHUNTASSISTANT
is fixated in parallel to the body axis. where a
paediSHUNTASSISTANT/SHUNTASSISTANT
is used without integrated catheters, the cathe-
ters (proximal and distal) have to be fastened
with a ligature. The paediSHUNTASSISTANT/
SHUNTASSISTANT should be positioned in
such a way that the skin incision does not lie
directly over the valve. The peritoneal catheter
can be used to pull the implant to the desired
implantation height. In doing this, the catheter
should not be stretched excessively. further-
more, care must be taken that no parts (e.g.
tissue fragments) get into the paediSHUNTAS-
SISTANT/SHUNTASSISTANT during implan-
tation. An arrow on the housing indicates the
direction of flow. The position of the ventricular
catheter should be inspected again by post-
operative cT or Mr imaging. The implantation
of the conventional or (adjustable) differential-
pressure valve is carried out according to the
instructions given by the manufacturer of the
valve selected.
PRESSuRE-flOw CHaRaCTERISTICS
The diagrams below show the pressure-flow characteristics for the pressure ratings in which
the paediSHUNTASSISTANT/SHUNTASSISTANT is available.
paediSHUNTASSISTANT 10 cmh
O
2
40
35
30
25
20
15
10
5
0
5
10
15
20
25
30
35
40
45
50
55
flow (ml/h)
SHUNTASSISTANT 15 cmh
O
2
40
35
30
25
20
15
10
5
0
5
10
15
20
25
30
35
40
45
50
55
flow (cmh
O) (ml/h)
2
SHUNTASSISTANT 20 cmh
O
2
40
35
30
25
20
15
10
5
0
5
10
15
20
25
30
35
40
45
50
55
flow (ml/h)
The total opening pressure refers to a reference flow of 5 ml/h. When the flowrates reach 20 ml/h, the opening
pressures are approximately 1-2 cmH
O higher
2
InstructIons for use |
GB
SHUNTASSISTANT 25 cmh
O
2
40
35
30
25
20
15
10
5
0
5
10
15
20
25
30
35
40
45
50
55
flow (ml/h)
SHUNTASSISTANT 30 cmh
O
2
40
35
30
25
20
15
10
5
0
5
10
15
20
25
30
35
40
45
50
55
flow (ml/h)
SHUNTASSISTANT 35 cmh
O
2
40
35
30
25
20
15
10
5
0
5
10
15
20
25
30
35
40
45
50
55
flow (ml/h)
17
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