The new prismax continuous veno-venous hemofiltration (cvvh) machine was primed and attached to patient without any problems.Shortly after attaching to patient while machine was up and running the deaeration chamber began accumulating foam and the fluid level started dropping quickly.This nurse was watching the chamber very carefully trying to keep it filled to the adequate amount while not allowing the foam to reach the sensor above.The foam continued to accumulate and it set off the sensor causing an alarm which stopped the circuit from running.This nurse tried to return the blood right away but the machine would not allow.Also this all happened very quickly and there was not time to call the machine hotline for help.The blood was not returned to patient and the trauma team was notified as well as nurse educator and charge rn manufacturer response for cvvh machine, prismax system (per site reporter): baxter service engineer came on-site and was not able to duplicate the reported condition.Engineer performed liquid level sensor sst as per manufacturer procedures and it passed.Also, performed simulated therapy with no unexplained alarms.The machine has been returned back into service.
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