Udi - n/a as this product code is not exported to the us market.Implanted date: device was not implanted.Explanted date: device was not explanted.Occupation - clinical engineer.Pma/510(k) - k130520.The actual device was not returned; therefore, an evaluation of the actual device was unable to be conducted.Review of the manufacturing record and the product-release judgment record of the involved product/lot number combination confirmed that there were not any anomalies in them.A search of the complaint file found no other similar reports with the involved product code/lot number combination.The following possibilities were considered to be the cause of the occurrence based on the description of the event, however, as the actual sample was not returned, the cause of occurrence could not be clarified from the results of the investigation.From the description of the event that the hemostasis protocol could not be performed after the administration of protamine and therefore the pump re-started, it was inferred that blood containing protamine was flowed into the thorax.Due to such blood having been suctioned and poured into the cr filter, it became clots clogging the cr filter.Relevant instructions for use (ifu) reference: "do not reduce heparin during circulation.Otherwise, blood clotting might occur." "adequate heparinization of the blood is required to prevent it from clotting in the system." (b)(4).
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The user facility reported that hemiarch replacement was performed for acute aortic dissection.Once the patient was weaned off, the pump was re-started as hemostasis could not be controlled.The anesthetist had administered protamine.The pump was re-started after heparin was administered again and act was confirmed to have been prolonged.However, cr filter became full of clots and the reservoir was changed out.There was no patient injury/medical or surgical intervention required.The final patient impact was not harmed.
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