programmed by Stephen Z Fadem

Simple Kt/V from URR

urr kt/v = -ln(1-URR) = ???

Urea Reduction Ratio (URR)

Calculated URR=


Weight loss (UF) =liters
T = time in hours=hours (??? minutes)
V= volume of distribution liters
W= Weight kg

Kt/V = ln (R - 0.008 x t) + (4 - 3.5 x R) x 0.55 UF/V = ???
Kt/V = ln (R - 0.008 x t) + (4 - 3.5 x R) x UF/W = ???

equilibrated Kt/V (eKt/V) from single pool venous Kt/V

spvKt/V: eKt/V from venous single pool Kt/V = spvKtv - 0.46*spvktv/t + 0.02 = ???

equilibrated Kt/V (eKt/V) from single pool arterial Kt/V

spaKt/V: eKt/V from arterial single pool Kt/V = spaKtv - 0.60*spaktv/t + 0.03 = ???

Calculate Dialyzer Clearance

equilibrated Kt/V (eKt/V) (Tattersall)

eKt/V=(t/t+35) x spKt/v=???; (t/t+35)=???

REFERENCES: Daugirdas JT. Simplified equations for monitoring Kt/V, PCRn, eKt/V, and ePCRn.Adv Ren Replace Ther. 1995 Oct;2(4):295-304.

Tattersall JE, DeTakats D, Chamney P, Greenwood RN, Farrington K: The post-hemodialysis rebound: Predicting and quantifying its effect on Kt/V. Kidney Int 50:2094-2102, 1996

© 2008-22, Stephen Z. Fadem, M.D., FASN. All rights reserved. No part of this application may be duplicated without written permission from the author.


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