Hello,I would like to know if anyone has had experience with the effects of "The Profile" selected on the dialysis machine,which is designed to enable fluid to be taken off without suffering from cramps and sudden low blood-pressure?I have noticed that it is usual for the water to be taken off "evenly" in "The Profile" through a 4-hour-dialysis-session,which is o.k. with me, if I have a small amount of water taken off,but it gives me cramps three-quarters of a way through, if a larger amount of liquid is taken off...... But when I had a “Tapered Profile”, where the highest amount of water was taken off at the beginningand the rest is “tapered evenly” down to nothing at the end ...... and also, when the Profile began with a smaller amount of liquid taken off to start off with and built up quickly over an hour and a half to a maximum ... and then “tailed off” slowly until the end...... Both of these two “Profiles” worked Wewell and avoided blood pressure problems and/or cramps...... I was told though, there could be potential problems with Potassium-levels when using such Profiles,if one arrives at dialysis with abnormal Potassium-levels...... But, I am not quite understanding what this means and the effects it could produce by using the "Tapered Profiles" I mentioned above?Thanks from Kristina.