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The hakim valve (id 823162) was returned for evaluation.Device history record (dhr) - the product code 82-3162 with lot cnjcc6, conformed to the specifications when released to stock.Failure analysis - the valve was visually inspected; a cut/tear in the needle chamber was noted.The position of the cam when valve was received was 80mmh2o.The valve was hydrated.The valve was tested for programming and failed the test, the cam mechanism just wiggled a little bit during the programming process.The valve was leak tested and only leaked from the needle hole in the needle chamber.The valve passed the test for occlusion, reflux, siphon guard and pressure.The valve was retested for programming and failed the test, the cam mechanism wiggled a little bit during the programming process.The valve was dismantled and was examined under microscope at appropriate magnification: biological debris was noted on the spring, on the cam mechanism and on the base plate.The cam magnets were controlled and failed.The root cause for the programing issue reported by the customer is due to the abnormal polarization of the cam magnets the root cause for the abnormal polarization was probably caused by an exposition of a too strong magnetic field, as noted in the ifu, ¿any magnet may experience a degradation of magnetic field strength as a consequence of exposure to the significantly stronger magnet field induced in a mri procedure.The root cause for the cut/tear in the silicone housing is probably due to a sharp or pointed object coming into contact with the silicone, as noted in the ifu silicone has a low cut/tear resistance.
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