Calculator: Residual kidney urea clearance (KrU) in hemodialysis patients

Input

ID urine volume
Urine urea concentration
ID period
U1
U2

Results

Important: Inputs must be complete to perform calculation.


Mean BUN
KrU

Decimal precision

Notes

U1 is the BUN just after the first dialysis of the week.
U2 is the BUN just prior to the second dialysis of the week.
KrU: residual kidney urea clearance, used to estimate residual kidney function; ID: interdialytic; BUN: blood urea nitrogen.

Equations used

Mean_BUN = (U1 + U2) / 2

KrU = ID_urine_volume * Urine_urea_concentration / ID_period / Mean_BUN

References

Daugirdas JT, Ing TS. Handbook of Dialysis, 2nd ed, Little, Brown 1994.

Only digits 0 to 9 and a single decimal point (".") are acceptable as numeric inputs. Attempted input of other characters into a numeric field may lead to an incorrect result.

Information on this page may not appear correctly if printed.

All information contained in and produced by the EBMcalc system is provided for educational purposes only. This information should not be used for the diagnosis or treatment of any health problem or disease. THIS INFORMATION IS NOT INTENDED TO REPLACE CLINICAL JUDGMENT OR GUIDE INDIVIDUAL PATIENT CARE IN ANY MANNER.

Topic 104842 Version 9.0

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Calculator: Residual kidney urea clearance (KrU) in hemodialysis patients