Approximate age of device ¿ 3 months.The event occurred at (b)(6).The report of thrombus within the blood pump was confirmed through a submitted photograph.The thrombus was situated around the pump rotor, was dark red in color, and appeared to have a stringy structure.The origin and a duration of time for which the thrombus was present in the blood pump could not be determined.A specific cause for the development of the thrombus formation could not be conclusively determined; however, the thrombus was very large and could have contributed to the reported flow below minimum alerts.The blood pump was reportedly disposed by the center and was not available for investigation.A review of the device history records revealed that the device met applicable specifications.No further information was provided.The manufacturer is closing the file on this event.
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