It was reported that the diagnostic systems of the hls module had been showing no values during therapy.First the venous inlet pressure was not measurable.After a few days of therapy, the flow sensor showed no value.The pump was stopped for a zero balance.Afterwards, the values were measurable.At the end of therapy, a blood clot was present (without delta p increase).The pump was stopped and another hls set was used.There was still significant color difference of the evacuative and afferent tubes during the stoppage of gas flow.After reducting the oxygen concentration to 21% at the gas blender, no color difference was visible in the tubes.No reported patient effect.(b)(4).
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