(b)(4).Upon completion of the investigation it was noted that the position of the cam when valve was received was 70mmh2o.The valve was visually inspected; no defects were noted.The valve was irrigated with purified water.No occlusion was noted.The valve was dried.The valve was leak tested, no leaks were noted.The valve was reflux tested, the valve failed the test.The valve was tested for programming.The valve failed the test, during the programming process the cam mechanism did not move.The valve was then pressure tested at 70mmh2o, the valve failed the test.The valve was dismantled and was examined under microscope at appropriate magnification: biological debris was found on the spring, on the spring pillar, on the ruby ball, on the seat of the ruby ball, on the cam mechanism, on the cam mechanism pillar, and on the base plate.The cam magnets were also controlled.The magnets passed.Review of the history device records confirmed the valve product code 0148csd, with lot ctbcc1, conformed to the specifications when released to stock on the 5th march 2015.The root cause of the problem found during investigation is due to biological debris found on the spring, on the spring pillar, on the ruby ball, on the seat of the ruby ball, on the cam mechanism, on the cam mechanism pillar, and on the base plate.Based on the results of this investigation no further action is required.Trends will be monitored for this and similar complaints.At the present time this complaint is closed.
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