A physician reported difficulty changing the setting of a certas plus: the valve was implanted via v-p shunt on (b)(6) 2020 with setting 2.However, when the physician tried to change to setting to 1, it was not possible.As a result, the patient developed ventricular enlargement and on (b)(6) 2020, the valve was replaced with a new one.
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Updated fields: d10, g4, g7, h2, h3, h6, h10 the certas valve was returned for evaluation.Device history record - review of the history device records for the valve, product code 82-8806 was not possible as the lot number was unknown failure analysis - the valve was visually inspected, no defects noted.The valve was leak tested; only leaked from the needle holes in the needle chamber.The valve passed the test for programming, occlusion, siphon guard, reflux and pressure.No root cause could be determined as the technician could not confirm the problem reported by the customer at the time of investigation.The possible root cause for the problem reported by the customer could be due to "biological debris and protein build up, no programming or occlusion issues were noted during the investigation.
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