No further information was obtained although multiple attempts were made.The lot numbers of the orbit coils that were implanted in the aneurysms when the events occurred are not known; therefore device history record reviews cannot be completed.The coils remains implanted and the delivery systems are not available for analyses.Aneurysm recanalization after coil embolization is a known event and has been estimated to occur anywhere from 5% to 38% of coiled aneurysms.Factors which may have a correlation with recanalization post coil embolization include larger aneurysm size, neck size, packing density, and inflow angle.With review of the available information there is no indication of any manufacturing issues related to the event.Therefore, no corrective actions will be taken at this time.
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