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The returned valve was patent.There was clear fluid inside the reservoir of the valve.It is unknown how or when this fluid entered the valve.The valve met the requirements of the magnetic flux test, reflux, siphon, leak, pressure flow and preimplantation.Therefore, the nature of the complaint could not be duplicated by the laboratory personnel.Proteinaceous debris was observed on the exterior of the valve and debris was on the interior of the valve.The ifu cautions that, ¿care must be taken to ensure that particulate contaminants are not introduced into shunt components during preimplantation testing or handling.Introduction of contaminants could result in improper performance of the shunt system.Particulate matter that enters the shunt system may result in shunt occlusion or may also hold pressure/flow controlling mechanisms open, resulting in overdrainage¿ and ¿the system may become occluded internally due to tissue fragments, blood clots, tumor cell aggregates, bacterial colonization or other debris.¿ all valves are 100% tested at the time of manufacture.If information is provided in the future, a supplemental report will be issued.
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