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The returned valve was patent and met the requirements for leak testing.The valve was returned at pl 1.5 and was not adjustable; therefore reflux, pressure-flow and pre-implantation testing are precluded.There was proteinaceous debris noted within the interior and exterior of the valve.Debris within the valve may interfere with the adjustment mechanism resulting in difficulty adjusting the valve.The instructions for use that accompany the device caution that ¿shunt obstruction may occur in any of the components of the shunt system.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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