Investigation: visual inspection no significant deformations or damage of the valve were detected during the visual inspection.Permeability test a permeability test has shown that the progav 2.0 valve is permeable.Adjustment test the progav 2.0 valve 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 2.0 valve.No significant deformations or damage of the valve were detected during the visual inspection.Next, we tested the permeability and adjustability, as well as the brake functionality and brake force.The progav 2.0 valve operates as expected and met all specifications.Finally, we have dismantled the valve.Inside the valve, we have found slightly build-up of substances (likely protein).Based on our investigation, we are unable to substantiate the claim of occlusion.At the time of our investigation, the progav 2.0 was shown to be permeable.However, it is possible that the deposits observed inside the valve could have caused the malfunction in the past.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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