The event occurred in the us.It was reported that a patient was on cardiohelp-i with vv support on (b)(6) 2021 due to complications with covid.Everything was going fine until (b)(6) 2021 when the hls module started to clot off.They swapped out the previous hls set for a new hls set on this date.Patient is stable at this time.It was stated by the customer that the patient was covid positive and they felt that this was as issue related to that condition.The customer discarded the circuit previously.The patient was infected with covid-19.Covid-19 diseases can be associated with intravascular coagulation activation, microcirculation disorders and increased risk of thromboembolism despite good systemic anticoagulation.The increased risk of thrombosis and coagulopathy in ecmo patients is a result of a combination of processes driven by the disease occurring in synergy with the effect of the extracorporeal circuit on the coagulation system.With reference to the risk assessment hls set advanced 5.0 / hls set advanced 7.0, dms#(b)(4), v26 and in consultation with the manager medical affairs the following events can contribute to clotting in the circuit: air remains in or enters the circuit, hemostasis, air or blood remains in luer lock access port , too low anticoagulation, too low at level, effect of heparin is too limited, protamine sulfate enters the hls set, administration of substitution of congealable substance such as plateles, (consumption) coagulopathy, thrombocytopenia.Based on this results the reported failure hls module clotted off could be confirmed.The occurrence rate was calculated for the reported issue 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 cardiopulmonarys trending program and additional investigations or corrections will be implemented in case of adverse trending.
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