The actual device was discarded by the involved facility and the lot number is unknown, however the facility provided photos of the involved device for evaluation.Based on the photos provided it was observed that some film-like clots had formed inside the lower part of the venous reservoir.The production lot number was not provided by the user facility, which prevented a meaningful review of the device history record and complaint files.With no return of the actual sample, the cause cannot be definitively determined.There are many complex clinical variables that may have caused the reported observed conditions.However, there is no indication that the reported event was related to a product malfunction or defect.The device labeling does address the potential for such an event in the instruction for use (ifu) "adequate heparinization of the blood is required to prevent it from clotting in the system.Do not reduce heparin during circulation.Otherwise, blood clotting might occur." (b)(4).All available information has been placed on file in quality assurance at the manufacturing facility for appropriate tracking, trending and follow-up.
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