(b)(4).Evaluation summary: the device was returned for analysis.The leak and tear in the device were unable to be confirmed.Using an indeflator with a luer attached to the rotator, and filled with water, the balloon was pressurized to the rated burst pressure (rbp) of 18 atms.The balloon inflated, held pressure and the stent implant deployed.Based on a visual and functional inspection of the returned device, there is no indication of a product quality issue with respect to the design, manufacture or labeling of the device.The investigation was unable to determine a conclusive cause for the reported difficulties.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot that would have contributed to this event.Additionally, a review of the complaint history identified no other incidents reported from this lot.Based on the information reviewed, there is no indication of a product quality issue with respect to the design, manufacture or labeling of the device.
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