The system was used for treatment.This case is reportable as a mdr due to the reportable malfunction clot observed in the return line.Since this reportable malfunction is only associated with the kit, this mdr will only be against the kit.A batch record review for kit lot: k211 was conducted.There were no non-conformances associated with this lot.This lot met all release requirements.A review of kit lot: k211 shows no trends.Trends were reviewed for complaint categories, alarm #: 17: return pressure and clot observed.No trends were detected for these complaint categories the assessment is based on the information available at the time of investigation.No product was returned for investigation; therefore, it could not be determined if the product met specification based solely on the information provided by the customer.The customer stated they added calcium to the collect line instead of the return line in error.The customer stated the calcium likely caused the anticoagulant to neutralize and was the cause of the blood clotting.Section 2-9 of the cellex operators manual (1470493 rev 6) for use with software 5.4 on anticoagulant states "caution: individual patients may require a heparin dosage that varies from the recommended dose to prevent post-treatment bleeding or clotting during a treatment.The physician should review the patient's medical condition, medications and platelet count at the time of treatment and use clinical judgement to establish the optimal heparin dosage for each patient." the root cause for the clotting observed was most likely due to the operator inadvertently adding calcium to the collect line instead of the return line.No further action is required at this time.This investigation is now complete.(b)(4).(b)(6) 2022.
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