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This complaint was reopened in reference to (b)(4).Investigation: visual inspection: no significant deformations or damage of the valve were detected during the visual inspection.Even though no significant visual deformations were observed, the measurement of the plane parallelism has shown that the valve is slightly outside the permissible tolerance of 0 ¿ 0.02 mm with a value of -0.0565 mm.Permeability test: a permeability test has shown that the valve is permeable.Adjustment test: the progav¿ 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 is fully operational and the braking force is within the given tolerances.Result: first, we performed a visual inspection of the progav¿.No deformations of the outer housing of the progav¿ valve were observed through the visual inspection.A slight deformation was observed through a measurement of the plan parallelity.Next, we tested the permeability, adjustability as well as the brake functionality and brake force.The valve operates as expected and met all specifications.Finally, we have dismantled the valve.Inside the valve we have found a small amount of build-up substances( like protein) past.As described in scientific literature, the problem encountered is one of the known, inevitable risks of hg-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 (b)(4).No further regulatory actions are required from our point of view.
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