Indication; Technical Description; Function Of The Valve - MIETHKE proGAV 2.0 Mode D'emploi

EN | INSTRUCTIONS FOR USE
Fig. 1: Schematic cross section of the proGAV 2.0
1 Adjustable differential pressure unit
(adjustable DP-unit)
2 Bow spring
3 Sapphire ball
4 Rotor

INDICATION

The proGAV 2.0 is used for cerebrospinal
fluid (CSF) drainage in the treatment of hydro-
cephalus.

TECHNICAL DESCRIPTION

The proGAV 2.0 is a valve made from titanium.
It consists of an adjustable differential pressure
unit and a gravitational unit.
The adjustable differential pressure unit con-
sists of a stable titanium housing in which a tried
and tested ball cone valve (1) is integrated in the
proximal section. A bow spring (2) determines
the opening pressure of this unit. The preten-
sion of the spring, and therefore the valve open-
16
5 Gravitational unit
(SHUNTASSISTANT 2.0)
6 Tantalum ball
7 Sapphire ball
ing pressure, can be adjusted through the skin
using a revolving rotor on a bearing (3). Major
components in the gravitational unit are a tan-
talum ball (4), which defines the opening pres-
sure for this valve depending on the body posi-
tion and a sapphire ball (5), which ensures pre-
cise closure.

FUNCTION OF THE VALVE

The proGAV 2.0 is a posture dependent hydro-
cephalus valve. The opening pressure for the
proGAV 2.0 is composed of the opening pres-
sures for the adjustable differential pressure unit
and the gravitational unit.
proGAV ® 2.0