(b)(4).Visual inspections were performed on the returned device.The tip detachment was confirmed.In this case, it may be possible that failing to retract the thumbslide prior to withdrawal caused the tip separation; however, this could not be confirmed.A review of the lot history record revealed no manufacturing nonconformities that would have contributed to this complaint.Additionally, a review of the complaint history of the reported lot revealed no other incidents.The investigation was unable to determine the cause for the reported tip detachment.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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