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Exemption number e2015012.B.Braun medical inc (importer) is submitting this report on behalf of b.Braun avitum ag (manufacturer).This report has been identified as b.Braun avitum internal report # (b)(4).It was not known if there may have been something with the blood lines that may have caused the foam in the venous chamber.There was no manipulation of the extracorporeal circuit shortly before the dialysis machine triggered the venous and arterial alarms.The saftey air detect (sad) alarm did not trigger.The customer trained technician confirmed the proper operation and function of the venous and arterial alarms and the proper operation of the safety air detect (sad).The analysis of the trend data record showed that all self-tests during the preparation phase passed successfully.During therapy many blood-side pressure alarms occurred, mostly arterial pressure (pa) alarms occurred.One (1) venous pressure (pv) minimum alarm occurred because of the pa alarm.The pa alarms were caused mostly by a sudden decrease of arterial pressure.Such a sudden decrease might be caused by a high blood pump speed and/or if the vascular access attaches to the vessel wall.Since the pa was relatively low (-140 mmhg at therapy start and about -160 mmhg during therapy), and the blood flow was relatively high (400 ml/min), the alarms described by the customer are comprehensible.Finally, the therapy was discontinued and terminated by the user.The trend data does not show any sad alarms or air detected by the sad.This is plausible as it was described that the foam was detected right below the bubble catcher.The described area is located before the sad so that the described foam could not yet be detected.Based on the technical inspection of the machine, especially the sad, at the customer side and the result of the trend investigation, the machine worked as intended and had no malfunction.The sad is checked during preparation and monitored during the therapy.If the sad generates an error, the machine triggers an alarm and switches into the patient-safe mode.Since there was no malfunction of the dialog+ dialysis machine, no further actions will be taken.B.Braun will continue to investigate, trend, and monitor all complaints of this nature.If additional pertinent information becomes available a follow-up report will be filed.
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