(b)(4).The device was not returned for analysis.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot that would have contributed to this event.A query of the complaint handling database for the reported lot revealed no other incidents reported for material rupture/balloon rupture.The investigation was unable to determine a conclusive cause for the reported balloon rupture and detachment of the device/balloon separation.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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