Investigation: visual inspection: no significant deformations or damage of the valves were detected during the visual inspection.Permeability test: a permeability test has shown that the valve is permeable.Adjustment test: for the shunt assistant the adjustment test is not applicable, because it is a valve with a fixed pressure.Braking force and brake function test: for the shunt assistant the test is not applicable, because it is a valve with a fixed pressure.Results: first, we performed a visual inspection of the valve.No significant deformations or damages of the valve are detected during the visual inspection.Further, we tested the permeability of the valve.The test has shown, that the valve is permeable.In order to verify whether the valve is compromised by the known risks of hydrocephalus therapy, e.G.By a build-up of natural substances (protein, blood or tissue particles) in the cerebrospinal fluid1, we have dismantled the valve.There were no visible deposits observed inside the shunt assistant.Based on our investigation results, we cannot confirm the suspicion of a blockage.We can exclude a defect at the time of release.The valve met all specifications of the final inspection when released from christoph miethke gmbh & co.Kg.Further actions: no further actions are required in our point of view.
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