Device evaluated by mfr.: the device was returned for analysis.During the visual and microscopic examination of the returned device, the distal tip of the protection wire was found to be normal and overall in good condition.It was not damaged or stretched.The filter bag was found deployed, the filter was found inverted, and the loop legs were found broken, but still attached to the device.The break was not found at a bond or joint.The break appears clean, with no jagged edges.No trace of blood was found on the inside of the device.170 cm of the protection wire was found exposed, where the slit begins at 6.9 cm from the distal end of the delivery sheath.The wire was found kinked approximately at 15.5 cm, when measured from the distal tip of the protection wire.The sheath was found kinked approximately at 148 cm, when measured from the distal tip of the delivery sheath.The cis technician was unable to perform the sheathing/unsheathing test due to the broken loop legs.The filter bag was observed to be in good condition and met specification.The peel away test was also performed successfully, no anomalies were observed.The manufacturing batch record review confirmed that the device met all material, assembly and performance specifications.The most probable root cause is considered handling damage as the event occurred without direct patient contact.(b)(4).
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