Cvvh machine would alarm "high balance chamber pressure" while priming new filters.Multiple filters used with different lot numbers.Lot numbers for filters are as followed: 00278006, 00778006.Cvvh machine was changed.Filter lot number 00678014 was inserted and the machine again alarmed with high balance chamber pressures and an additional alarm of "air in replacement fluid line" even though there was no visible air in the circuit.Each of these filters had to be discarded.The patient was absent from cvvh for between 4 to 5 hours.
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