texture of the surrounding area of the implant,
the acoustic signal could be considerably mut-
ed. The clicking sound should generally be au-
dible by the patient itself or via a stethoscope.
Caution: The new opening pressure set-
ting of the valve must not differ from the
measured opening pressure by more than
8 cmH
O in any one setting (see chapter 4
2
"verifying the adjustment").
example: Opening pressure is to be changed
from 3 to 18 cmh
O. with only one adjustment
2
procedure the rotor would turn in the wrong
direction (short way) and would stop at the po-
sition 0 cmh
O. The correct adjustment is in 2
2
steps: Adjustment from 3 to 11, and from 11 to
18 cmh
O. The rotor turns correctly.
2
3
0
18
a)
Fig. 12: Rotor rotation during adjustment
a) false b) correct
from proGAV 2.0 Adjustment tool a
magnetic fi eld emanates. metallic ob-
jects and magnetic media storages should have
a suffi cient safety margin.
4.Verifying the adjustment
After adjusting the valve by using the proGAV
2.0 Adjustment tool, it must be verifi ed using
the proGAV 2.0 Compass as described in step
2. If the measured pressure now differs from the
intended pressure level, the adjustment proce-
dure has to be repeated from step 3.
due to postoperative swelling of the skin the
adjustment of the valve setting may be diffi cult
within the fi rst few days.
If the pressure confi guration of the valve cannot
be determined with complete certainly by the
proGAV 2.0 Compass, the use of imaging tech-
niques is recommended.
proGAV Check-mate
The proGAV Check-mate is delivered sterile
and is intended to be re-sterilised. It is possi-
ble to change and to verify an applied pressure
setting on the valve directly. To verify the actual
pressure setting the proGAV Check-mate has
to be put centrally over the valve. The proGAV
Check-mate will immediately start to move. If
it remains stable, the pressure setting can be
read in alignment to the inlet connector.
To adjust a new pressure setting, the proGAV
Check-mate has to be placed centrally over the
valve. The new pressure setting has to point
towards the proximal catheter (leading to the
ventricle). By pressing down slightly the proGAV
Check-mate, the brake of the valve is decou-
pled, the rotor turns and the opening pressure
of the proGAV 2.0 is changed.
Please be aware that the steps for changing
3
the pressure setting should not be more than
8 cmh
0
18
b)
Fig. 13: proGAV Check-mate
GAV 2.0 tools nearby pacemakers. further
more do not use the proGAV 2.0 tools near-
by mrI scanner, since ther is a danger of
damaging the mrI-scanner.
INSTrUcTIONS fOr USe |
0297
O per step.
2
caution: due to magnets inside the
proGAV 2.0 tools, do not use the pro-
GB
23