Implanted date: device was not implanted.Explanted date: device was not explanted.Review of the provided photo and movie showing the reported event revealed that blood was flowing out of the upper part of the venous filter (around 2800ml level of the reservoir); the blood level inside the venous filter was approximately 300ml.The actual sample was received for evaluation.Visual inspection revealed no obvious anomaly, such as a break, in the appearance.In order to evaluate the defoaming performance of the venous filter, the actual sample was rinsed and built into a circuit with tubes, and then circulated with bovine blood at the flow rate of 0 - 4l/min in a manner that the blood level in the reservoir kept at 300ml (the same level as that shown in the provided photo).The reported event was not reproduced in this test.Bovine blood was circulated in the circuit in the manner where air was being suctioned into the venous line.This resulted in flow-out of blood from the upper part of the venous filter.Air mingled into the venous filter is defoamed by the defoamer set inside the venous filter.In this complaint, however, air continued to enter the reservoir continuously, resulting in flow-out of blood from the upper part of the venous filter.The venous filter was disassembled from the actual sample and the tube linked to the venous line was visually inspected.No break or no other anomaly was found in the appearance.Review of device history records and the shipping inspection record of the involved product/lot# combination was conducted with no relevant findings.Based on the provided information and investigation results, there is no definitive evidence that this event was related to a device defect or malfunction.The actual sample after having been rinsed did not have any anomaly which could have led to the blood flowing out of the upper part of venous filter.It is likely that air bubbles suctioned into the venous line were accumulated in the venous filter and finally flowed out of the upper part of the venous filter.However, with no reproduction of the reported event achieved during inspection of the actual sample, the exact cause of the reported event cannot be definitively determined based on the available information.(b)(4).
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The user facility reported that they did not find anything unusual during priming of the involved capiox device; may be the flow rate was small.When they started cpb, they saw the venous blood out of from the upper side of vr filter and felt venous blood flow was not smooth.They changed the actual reservoir, and everything became normal.The patient was not harmed.The procedure outcome was not reported.
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