Result: an investigation was not possible because no product was sent for investigation.With reference to the complaint of non-adjustment of the valve and over-drainage, we assume that that any deposits of protein have been affected the function of the valve.Referring to the reason complaint of the no adjustable we point out that it is important to position the adjustment tool centrally over the valve.Another explanation for this may be that the implantation position has been chosen unfavorably due to the anatomical conditions of the patient, or that the skin over the valve was too thick, which could have caused adjustment difficulties.As described in our literature, any deposits can also impair the function of the valves.However, we cannot finally clarify what influenced the function, as this would require an examination of the valve.Further actions based on the current information, no further actions are required from our point of view.
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