The actual device was not returned to the manufacturing facility and evaluated.Therefore, the investigation consisted of a review of retention samples, user facility information and manufacturer quality records.Visual inspection of the retention sample found no abnormalities.A review of the device history record and manufacturing inspection record confirmed that there were no production related problems.Although the cause of the reported event cannot be definitively determined based upon the available information, there is no evidence that this event was related to a device defect or malfunction.All available information has been placed on file in quality assurance at the manufacturing facility for appropriate tracking, trending, and follow-up.(b)(4).Device not returned.
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