Exemption number (b)(4).The device was not returned for evaluation.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 similar incidents and/or complaints from this lot.Based on the information provided, a definitive cause for the stent dislodgment could not be determined.There is no indication of a product quality issue with respect to manufacture, design or labeling.
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