This report has been identified as b.Braun medical internal report number (b)(4).All information associated with this event was submitted to the bloodline manufacturer for further evaluation.According to investigation results, three (3) photographs of the blood tubing were provided for evaluation.The complaint was confirmed as there appeared to be black marks in the tubing.The photographs were provided to manufacturing for review.Manufacturing was unable to determine the root cause of this issue.A review of the device history records was performed and indicated that there were no quality issues during the manufacturing process of this lot related to the reported issue.A search of the complaint database for this blood tubing set lot number shows no additional complaints of component contamination as of complaint closure, indicating this is an isolated occurrence.We will maintain this report for further references and continue to monitor other reports for similar occurrences.If any additional pertinent information becomes available, a follow up will be submitted.
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