The oxygenator was received full of blood.When the oxygenator was flushed, very small clots were washed out.The filter of the oxygenator was found to be heavily occluded with clots.It was cleaned twice with sodium hypochlorite, and then was sent to the performance laboratory to for further testing.The results of the tests showed that the gas exchange and delta p performance were not within the specified range.The measurement of the pressure drop (delta p) was not possible because of clotting.However, as the customer stated that no further information would be available from this case, including details of patient condition before and during the reported incident, the anti-coagulation measures in use, and any other clinical or application-related factors that may have caused or contributed to the incident, the application therapy manager concluded that there is insufficient information available to carry out a meaningful clinical assessment.Therefore it has not been and will not be possible to establish a definitive root cause for the observed clotting.A device history record of the affected lot has been investigated and no abnormality was found.This complaint is the only complaint related to the product group 10000.A product/manufacturing-related malfunction is not indicated.Investigation of this complaint and trending for this issue indicates that this is an isolated case, for which maquet cannot get any further information.Based on the investigation results, no further investigation or action is possible and the complaint will be closed.
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