The certas valve was returned for evaluation.Failure analysis - the position of the cam when valve was received was at setting 3.The valve was visually inspected; cloudy biological debris was noted inside the valve.The valve was hydrated.The valve was leak tested and no leaks noted.The valve passed the test for programming, occlusion, reflux, siphon guard and pressure.No root cause could be determined as the technician could not confirm any problem with the valve at the time of investigation.The possible root cause for the issue reported by the customer could be due to biological debris and protein build up interfering with the valve mechanism, at the time of investigation the no functional issues were noted with the valve.1 of 3 reports.Other mfg report numbers: 3013886523-2021-00456, 3013886523-2021-00455.Additional information received indicated both the ventricular catheter and the peritoneal catheter were coming out toward the valve, and the valve appeared to have a pool of jelly-like material inside.The valve, the ventricular catheter and the peritoneal catheter were removed and replaced on (b)(6) 2021.The patient's condition is stable.
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