Evaluation summary: only shunt was received for investigation.During inner illumination test, the shunt lumen was found open.Therefore, the customer complaint could not be confirmed.There was no data regarding product identity was received i.E.No lot or serial number were indicated for the event; therefore, the device history record (dhr) could not be reviewed.Therefore, there is no indication for manufacturing related factors that could cause the reported event.During production, 100% final inspection is being performed on the entire batch, including visual inspection and inner illumination.If a blockage would be noticed, the product would have been rejected immediately.The root cause is inconclusive ¿ product met specifications, since the blockage was not confirmed and there is no indication for an inherent defect that might have caused the event.The manufacturer internal reference number is: (b)(4).
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