(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.There was no reported device malfunction and the product was not returned as the stent remains in the anatomy.The reported patient effect of hypersensitivity is listed in the xience pro x everolimus eluting coronary stent system instructions for use (ifu) as a known patient effect of coronary stenting procedures.A review of the lot history record and complaint history of the reported lot could not be conducted because the lot number was not provided.Based on information reviewed, a conclusive cause for the reported patient effects, and the relationship to the product, if any, cannot be determined.Xience prox is currently not commercially available in the u.S.However, it is similar to a device sold in the us.
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