Qualitative drug-exposure and clinical feature checklist for DI-AIN suspicion.

Acute Kidney Injury · Updated 4/13/2026

AKI severity from baseline vs current creatinine and optional UOP/RRT flags.

Acute Kidney Injury · Updated 4/13/2026

Anion gap and albumin-corrected anion gap calculator.

Electrolytes · Updated 4/13/2026

Estimated total body bicarbonate deficit (mEq) from weight and serum bicarbonate.

Electrolytes · Updated 4/13/2026

Net fluid balance from total intake minus total output (mL) over an interval.

Fluids · Updated 4/13/2026

Ratio of BUN to serum creatinine (mg/dL) with contextual interpretation.

Renal Function · Updated 4/13/2026

Race-free estimated GFR from serum creatinine, age, and sex (adults ≥18). KDIGO G-staging.

Renal Function · Updated 4/13/2026

Estimates CrCl for drug dosing from age, weight, sex, and serum creatinine.

Renal Function · Updated 4/13/2026

Calculates measured creatinine clearance from timed urine collection.

Renal Function · Updated 4/13/2026

FEMg % using concurrent urine/serum magnesium and creatinine (mg/dL).

Electrolytes · Updated 4/13/2026

FEMg % with magnesium mmol/L and creatinine umol/L.

Electrolytes · Updated 4/13/2026

FENa (%) = (urine Na × serum Cr) / (serum Na × urine Cr) × 100 using mEq/L for sodium and mg/dL for creatinine. Helps distinguish prerenal vs intrinsic AKI; confounded by diuretics, CKD, contrast, and other settings.

Acute Kidney Injury · Updated 4/13/2026

FEUrea (%) = (Urine urea × Serum Cr) / (Serum urea × Urine Cr) × 100. Often used when diuretics reduce FENa reliability.

Acute Kidney Injury · Updated 4/13/2026

Estimates free water deficit: TBW × ((current Na / target Na) − 1).

Electrolytes · Updated 4/13/2026

Computes pH using Henderson-Hasselbalch: pH = pKa + log10(A- / HA).

Acid-Base · Updated 4/13/2026

Risk prediction in IgA nephropathy progression.

Risk Scores · Updated 4/13/2026

Practical CKD progression risk estimate from age, eGFR, and albuminuria.

CKD · Updated 4/13/2026

Height-based kidney length percentiles (LMS) and BSA-related single-kidney volume (BSARV × Du Bois BSA) from weight and height. Ped(z) cites Deeg & Weitzel (1997) and Scholbach & Weitzel (2012); this tool implements Obrycki et al. 2022 LMS (PMC9023417) and Scholbach Table 1 (PMC3820439). Not affiliated with pedz.de.

Pediatric Nephrology · Updated 4/16/2026

Approximate non-steady-state kidney function from serial creatinine values.

Acute Kidney Injury · Updated 4/13/2026

Approximates spKt/V from pre/post dialysis BUN reduction.

Dialysis · Updated 4/13/2026

Renal ultrasound chronicity checklist (educational proxy).

Imaging · Updated 4/13/2026

Approximate risk stratification for severe AKI/RRT in rhabdomyolysis.

Acute Kidney Injury · Updated 4/13/2026

Historical MDRD estimated GFR equation from serum creatinine, age, and sex.

Renal Function · Updated 4/13/2026

eGFR category interpretation with simplified CKD stage thresholds.

Laboratory Medicine · Updated 4/13/2026

Estimated GFR (mL/min/1.73 m²) with multiple pediatric equations (Grubb 2014 CAPA, CKiD 2012 combined and cystatin bedside, Schwartz bedside 2009, CKiD creatinine k, Filler 2003, Grubb 2005 power, Counahan 1976, Schwartz 1976 k-table), KDIGO 2012 CKD G-staging, DOB-based age. Ped(z) cites KDOQI 2002 for percentiles and KDIGO 2012 for CKD stages; Zappitelli 2006 and Bouvet 2006 are listed but not coefficient-embedded—see tool notes. Not affiliated with pedz.de.

Pediatric Nephrology · Updated 4/16/2026

CrCl-band multipliers for approximate renal dose adjustment (verify per drug).

Renal Calculators · Updated 4/13/2026

RIFLE AKI class screening from creatinine change and urine output.

Acute Kidney Injury · Updated 4/13/2026

Calculated serum osmolarity from sodium, glucose, BUN, and optional ethanol.

Electrolytes · Updated 4/13/2026

Cockcroft-Gault estimate using serum creatinine in umol/L.

Renal Function · Updated 4/13/2026

Computes sodium change rate per 24 hours for safety monitoring.

Electrolytes · Updated 4/13/2026

Estimated sodium deficit using TBW and target sodium.

Electrolytes · Updated 4/13/2026

Calculates TTKG from urine/serum potassium and osmolality.

Electrolytes · Updated 4/13/2026

Approximates daily protein excretion from UPCR and body surface area.

Renal Function · Updated 4/13/2026

Calculates UAG = urine Na + urine K − urine Cl.

Electrolytes · Updated 4/13/2026

Urine output rate (mL/kg/hr) and I/O balance over a window.

Renal Calculators · Updated 4/13/2026