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Visual inspection
during the investigation, no significant deformations or damage of the valves were determined.Permeability test
a permeability test has shown that all components are permeable.Computer controlled test
to investigate the claim of under-drainage, the opening pressure is measured using a miethke computer controlled testing apparatus which simulates a cerebrospinal fluid flow.The valves are tested in both the horizontal as well as the vertical positions.The results show that the valves operate within the permissible tolerance in their respective relevant positions.Adjustment test
the progav 2.0 was tested and is adjustable to all specified pressures.Braking force and brake function test
the brake functionality test has shown that the brake function operates as expected and the braking force is within the given tolerances.Internal inspection
after dismantling of the valves, no deposits were found.Results
based on our investigation results, we cannot determine any functional deviations or other abnormalities in the products.How the abovementioned functional impairment occurred is not clear to us at the time of examination.We can exclude a defect at the time of release.The shunt system met all specifications of the final inspection when released from christoph miethke gmbh & co.Kg.No further regulatory actions are required from our point of view.
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