The lot history records have been reviewed with special attention to the manufacturing and inspection of this product and the product was found to have met all specifications prior to shipment.As part of all complaint investigations, an attempt was made to evaluate the subject device as well as the device usage.In this case, no sample and no image was provided for evaluation.Therefore, the reported event could not be reproduced.Potential contributing factors to the reported event have been considered.Previous investigations of similar complaints have been reviewed.The reported stent compression may have been caused by an irregular stent placement.An unintended movement of the delivery system or excessive compression of the outer catheter during deployment may result in an irregular stent placement.Also a challenging stent placement site as well as tortuous and/or calcified vessel anatomy may contribute to an irregular stent placement.In this case, no anatomical or procedural details were provided.As reported, the lesion had not been pre-dilated.An insufficient pre-dilation of the lesion may be another contributing factor to the reported event.On the basis of the information available, a definitive root cause for the reported complaint could not be determined.The ifu supplied with this device sufficiently describes the correct deployment of the stent.
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