Either of two tests may be used to measure how much haemodialysis you get. These tests aren't the only things that's important though. It is also important to have long enough dialysis to get fluid balance right, and to correct some other chemicals, such as Phosphate.
Urea Reduction Ratio (URR)- This is a measure of how much waste products such as urea have been reduced by one haemodialysis treatment. It is used to check that enough haemodialysis is being given. If it is too low more than once, you should find out why.
· URR should usually be over 70% if you are dialysed three times each week and have little or no remaining kidney function.
Kt/V- This is a more complicated test of how good dialysis is. URR is a simpler test. Kt/V includes more than just the change in urea. If it is too low more than once, you should find out why.
· Kt/V should be over 1.2 for each dialysis if you are dialysed three times each week and have little or no remaining kidney function.
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