Investigation visual inspection no significant deformations or damage of the valve were detected during the visual inspection.Permeability test a permeability test has indicated that the valve has a blockage.Adjustment test this is a fixed pressure valve.An adjustment test is not applicable.Braking force and brake function test this is a fixed pressure valve.A braking force and brake function test is not applicable.Results it should be noted that the valve was received dry (i.E.Not submersed in liquid as recommended).The investigation of dry items is not significant due to the affect dry deposits of liquor and blood can have on product performance.In spite of this, we have investigated the valve to the best of our abilities.First, we performed a visual inspection of the gav 2.0.No significant deformations or damage of the valve were detected during the visual inspection.Next, we tested the permeability of the valve.The valve was shown to have a blockage.Finally, we have dismantled the valve.Inside the valve, we have found a build-up of substances (likely protein).Based on our investigation, we confirm the presence of occlusion in the valve, likely due to the deposits observed inside the valve.As described in scientific literature, the problem encountered is one of the known, inevitable risks of hc-therapy by shunt implants.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.
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