Blood Transfusion of PRBC during dialysis

Yes K+ can increase with transfusion of PRBC....the is aproximately 7meq K+ per unit of blood but that varies according to the "freshness" of the PRBC. We typically adjust the dialysate bath if a pt is to receive more than 1 unit PRBC's say for instance the pt's K+ is 4.2 we would run them on a 2K+ bath instead of our standard protocol for a 3K+ bath to prevent hyperkalemia.

We connect the blood transfusion line to the arterial line just before the blood pump but not at the arterial trap/chamber. That means the blood actually do passes to the dialyser and I would say that the excess potassium in the blood will get diffused off better as the concentration gradient would be higher as blood is being transfused during dialysis.

Can anyone share with me the duration of blood transfusion during dialysis for 1 or 2 units of blood? Any documentation or guidelines I can refer to?

Siew Eng