(b)(4).Pma/510(k) # p100022/s001.The device was implanted in the patient and is therefore unavailable for investigation.With the information provided a document based investigation was carried out.There is no evidence to suggest that this event did not occur, therefore the complaint is confirmed based on customer testimony.It may be noted however all zilver ptx devices are shipped with a product label placed on the outer zilver ptx carton box and product label placed on the inner pouch.Both labels contain information with manufacturing and expiration dates.Based on the above, the most likely cause of this complaint can be attributed to customer error as zilver ptx devices should not be used beyond the date specified on the product label.As there is no device returning for evaluation, a definite root cause of this event cannot be determined.As per the instructions for use, it states "do not use the stent after the "used by" date specified on the package." as the rpn and lot number of the complaint stents are unknown, a review of the relevant manufacturing records cannot be conducted.However, prior to distribution all zilver ptx devices are subject to visual inspection and functional checks to ensure device integrity.There was no surgical intervention reported as a result of this occurrence.Quality engineering will continue to monitor complaints of this nature for any potential emerging trends.
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