MIETHKE proGAV 2.0 Instrucciones De Manejo página 22

| INSTrUcTIONS fOr USe
GB
1. Locating the valve
If the instrument is opened a template is visible
(fig. 9). Then the valve can be located on the
patient's head with the forefinger.
Fig. 9 Locating the valve with the
proGAV 2.0 Compass
The proGAV 2.0 Compass must be positioned
centrally on the valve. The markings on the in-
strument "proximal" and "distal" show the flow
direction.
2. Verifying the opening pressure
when the compass is closed, the pressure set-
ting is indicated automatically. (fig. 10)
Fig. 10: Verifying the pressure setting with the
proGAV 2.0 Compass
Caution: Placing the proGAV 2.0 Compass in
a non-central position on the valve can lead
to erroneous readings!
The proGAV 2.0 Compass is sensitive to ex-
ternal magnetic fields. To exclude undesirable
interactions the proGAV 2.0 Adjustment tool
should not be in the immediate vicinity of the
proGAV 2.0 Compass while determining the
opening pressure. we recommend a distance
of about 30 cm to the 2.0 proGAV Compass.
22
3. Adjusting the opening pressure
The proGAV 2.0 Adjustment tool must be po-
sitioned centrally on the valve. for a correct
placement the valve should be palpated with
the forefinger through the opening in the middle
of the instrument. The desired pressure setting
must point on the scale in direction of the in-
let connector and the ventricular catheter. By
applying light pressure the rotorbrake will be
released and the pressure of the proGAV 2.0
can be changed.
a)
b)
Fig. 11: a) and b)
Adjustment with the proGAV 2.0 Adjustment tool
The proGAV 2.0 is equipped with a feedback-
mechanism. when using the proGAV 2.0 Ad-
justment tool, pressure on the housing of the
valve is created and a resulting acoustic signal
(a clicking sound) is produced due to the unique
construction of the valve housing. This clicking
sound indicates that the rotorbrake is released.
Now the rotor can rotate freely. Once the pres-
sure on the valve is released, a clicking sound is
heard and the rotorbrake is again locked safely
so that the valve is safe against spontaneous
re-adjustments.
The clicking sound is well recognizable before
implantation. however after implantation, once
the valve is filled up, depending on place and