2022 non-steady state kidney function calculator
With the 2009 CKD-EPI equation having fallen out of favor (1), it is high time to provide an updated non-steady state kidney function calculator (2, 3):
Non-steady state GFR is estimated with the EKFC formula (4) and the 2021 CKD-EPI refit (5). It also provides 2012 KDIGO AKI categories (6) with standard 7 day and 48 hours creatinine values (7).
For reference values for creatinine generation rate and total body water for adults see (3, 8).
References
Delgado C, Baweja M, Crews D et al. A Unifying Approach for GFR Estimation: Recommendations of the NKF-ASN Task Force on Reassessing the Inclusion of Race in Diagnosing Kidney Disease. J Am Soc Nephrol. 2021; ASN.2021070988.
http://www.swissnephro.org/blog/2021/3/2/the-non-steady-state-ckd-epi-calculator
Pottel H, Björk J, Courbebaisse M et al. Development and Validation of a Modified Full Age Spectrum Creatinine-Based Equation to Estimate Glomerular Filtration Rate : A Cross-sectional Analysis of Pooled Data. Ann Intern Med. 2021; 174(2): 183-191.
Inker LA, Eneanya ND, Coresh J et al. New Creatinine- and Cystatin C-Based Equations to Estimate GFR without Race. N Engl J Med. 2021