(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.The absorb device is currently not commercially available in the u.S; however, it is similar to a device sold in the us.There was no reported device malfunction and the product was not returned as the scaffold remains in the anatomy.Cine films were received and reviewed by an abbott vascular clinical specialist.The reviewer concluded the following: single vessel disease is treated with absorb scaffold implantation with no pre-dilatation or post-dilatation.After expansion the distal scaffold is underexpanded.One year post implant under expansion persists.The patient returns at 22 months post implant and one month after stopping aspirin with thrombus in the vessel proximal to the scaffold extending into the proximal scaffold.There appears to lesion progression in the mid distal of the scaffold extending distally.A metallic stent is seen in the vessel distal to the scaffold.Implantation is not documented.Thrombus is seen throughout the proximal to mid vessel and continues to occlude the distal vessel.The reported patient effects of cardiac arrest, death, myocardial infarction, thrombosis and restenosis, as listed in the bioresorbable vascular scaffold (bvs) system, absorb, instructions for use (ifu) are known adverse events associated with the use of a coronary scaffold in native coronary arteries.Additionally, the ifu states: pre-dilate the lesion with a percutaneous transluminal coronary angioplasty catheter.It is unknown if the reported ifu deviation caused or contributed the reported complaint.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot that would have contributed to this event.Based on the case information and related record review, 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.
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