Results of laboratory investigation: during visual inspection clots on the blood inlet side were noted.The oxygenator was rinsed out two times to wash out all clots.Further inspection showed that the internal and venous pressure sensors were yellow discolored.All pressures were measured correctly during functional testing.Thus the failure "bad oxygenation performance" could be confirmed.The most probable root cause are the detected clots leading to reduced flow.Clotting is a known phenomenon to mcp and the cause of this incident was determined to not be attributed to a device related malfunction.Based on these results and the information available at this time, the oxygenator in question operated within mcp specifications the occurrence rate was calculated for the reported failure and it was determined that this is not a systemic issue.Therefore, no remedial action is required.The occurrence rate related to the reported issue is currently being monitored as part of maquet cardiopulmonary¿ s trending program and additional investigations or corrections will be implemented in case of adverse trending.
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