Complaint / failure description: the customer stated they put a patient on cardiohelp and soon after the delta p went to 100.They changed out the circuit for another hls set and are continuing support without the same issue occurring.Further information received on 2020-01-10: oxy did seem to prime slower than normal, otherwise nothing abnormal.Investigation results: maquet gmbh requested the product in question for further investigation in the laboratory of the manufacturer on 2019-12-27.The returned product was received by the manufacture on 2020-01-15.The sample was investigated in the laboratory of the manufacturer on 2020-02-06.During rinsing of the hls oxygenator with water small clots were flushed out.The visual inspection and the tightness test according to lv 201 did not reveal any defect or leakage.During the function test of the oxygenator, with the help of the cardiohelp, no defects (pressure abnormalities, pump issues, sensor issues) could be detected.Thus the reported failure could not be confirmed.When the event occurred, the device was being used for treatment of the patient.The product was directly involved in the incident.The most probable root cause could not be determined.The occurrence rate regarding the above complaint is below the acceptance rate.Thus, no remedial action 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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