GAV ® 2.0

The GAV 2.0 is the consequent further development of the proven GAV and paediGAV and like its predecessors a gravitational valve consisting of a differential pressure and gravitational unit. It automatically adjusts its opening pressure to the patient's different body positions and can thus meet the different requirements of a shunt system in lying and standing positions and above all counteract the risk of possible overdrainage in the upright body position.

The fixed gravitational valve for the treatment of hydrocephalus

•    SINGLE valve for children and adults
•    modified opening pressure concept
•    innovative opening pressure coding for clear opening pressure detection in imaging
•    two additional models for lumboperitoneal CSF drainage

    A valve for children and adults

    The slim cylindrical design of its predecessor was further optimized and reduced in the GAV 2.0 for better flow characteristics. The result is an even smaller valve than the well-known paediGAV, which is often used for children. The GAV 2.0 für is therefore suitable for the treatment of hydrocephalus in premature and newborn babies, children and adults.

    Two additional LP variants

    Two models for lumboperitoneal CSF drainage have been added to the GAV 2.0

    GAV 2.0 LP

    GAV 2.0 LPU

    Functionality

    The GAV 2.0 is a gravity valve. It therefore works depending on its position and must therefore always be implanted parallel to the body axis.


    Horizontal body position

    The valve opening pressure of the GAV 2.0 is determined only by the micro-spiral spring of the differential pressure unit when lying down. The gravitational unit is not active in this body position and is always open. If the patient's cerebral pressure (IVP) exceeds the opening pressure of the microspiral spring, the closure ball moves out of the cone so that a gap is opened for drainage.

    Vertical body position

    In the vertical body position, the gravitational and differential pressure units work together. As soon as the patient straightens up, the balls in the gravitational unit are activated, close the passage and cause an increased valve opening pressure by means of gravity. Now I have to in addition to the opening pressure of the differential pressure unit, the weight force of the balls can be overcome. Drainage is only possible again if the sum of cerebral pressure (IVP) and hydrostatic pressure exceeds the opening pressure of both units. With this significantly higher opening pressure for the standing body position compared to lying down, the physical requirements for a shunt system are taken into account and the risk of overdrainage is reduced.

    The Miethke App

    The functionality of the GAV 2.0 in different body positions is illustrated interactively in the Miethke App.

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