The device was not returned as the stent remained in the patient anatomy.The lot history record (lhr) review for this product was not performed because the lot number was not reported and the product was not returned for analysis.Based on the case information, a conclusive cause for the reported patient effects, and the relationship to the product, if any, cannot be determined.There is no indication of a product quality issue with respect to design, manufacture or labeling of the device.Exemption number (b)(4).
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