Nephrology calculators for kidney function, eGFR, electrolytes, and dialysis. Designed for nephrologists, clinicians, and medical students.
Medical Calculator – SonDoctor.com × ABGA Calculator [ ABGA reference values ] pH : 7.38 ~ 7.42 PaCO2 : 38 ~ 42 HCO3 : 22 ~ 26 ※ Even if all values are normal, interpretation should be made according to clinical situation. (Mixed pattern may exist even with normal ABGA.) pH (6.8~7.8) : PaCO2 (mmHg) … Read more
Medical Calculator – SonDoctor.com × Kidney failure risk equation calculator Calculates the risk of progression to end-stage kidney disease in patients with chronic kidney disease. (Estimates the 2-year and 5-year risk of requiring dialysis.) *If all optional fields are entered, the 8-variable equation is applied. If any are missing, the 4-variable equation is used. 4-variable … Read more
Medical Calculator – SonDoctor.com × Erythropoiesis Injection Dose Conversion Calculator (EPO converter) (1) Select the type of EPO you want to convert. (2) Enter the dose and click the calculate button. You will see the converted doses for each EPO type. Select the EPO type to convert: Epoetin α,β (units/week)Dose : 1000/2000/4000/10000 Darbepoetin [NESP®](mcg/week)Dose : … Read more
Medical Calculator – SonDoctor.com × Calculate H⁺ concentration and pH from PaCO₂ and HCO₃⁻ (Henderson-Hasselbalch equation) Henderson-Hasselbalch equation: pH = 6.1 + log([HCO₃⁻] / (0.03 × PaCO₂)) [H⁺](mol/L) = 10-pH PaCO₂ (mmHg) : HCO₃⁻ (mmol/L) : ※ pH 7.40 = approximately 40 nmol/L
Medical Calculator – SonDoctor.com × Urine Anion Gap Calculator Urine Anion Gap (UAG) = [Na+] + [K+] – [Cl-] Meaning of UAG: Is ammonia genesis functioning properly? UAG negative: ammonia is well produced → acid is being excreted (normal). UAG positive: ammonia is poorly produced → acid is not excreted (abnormal). Urine Na (mmol/L): Urine … Read more
Medical Calculator – SonDoctor.com × Pediatric Estimated Glomerular Filtration Rate Calculator (Pediatric eGFR) 1. Cr-based ‘Bedside Schwartz’ (2009) eq.: eGFR = 0.413 × Height / Cr 2. CysC-based (2012) eq.: eGFR = 70.69 × cysC-0.931 3. Cr-CysC-based CKiD (2012) eq.: eGFR = 39.8 × ((height/100)/Cr)0.456 × (1.8/cysC)0.418 × (30/BUN)0.079 × [if male]1.076 × ((height/100)/1.4)0.179 4. … Read more
Medical Calculator – SonDoctor.com × Urine PCR Calculator (Protein-to-Creatinine Ratio) urine PCR(mg/g Cr) = urine Protein / urine Creatinine Urine Protein : mg/dLmcg/mLmg/L Urine Creatinine : mg/dLmmol/Lμmol/Lg/dL urine PCR < 150 mg/gCr : Normal urine PCR 150~3000 mg/gCr : non-Nephrotic urine PCR ≥ 3000 mg/gCr : Nephrotic Degree of proteinuria Normal to mildly increased Moderately ... Read more
Medical Calculator – SonDoctor.com × Urine ACR Calculator (Albumin-to-Creatinine Ratio) urine ACR (mg/g Cr or mcg/mg Cr) = urine Albumin / urine Creatinine Urine Albumin : mcg/mLmg/Lmg/dL Urine Creatinine : mg/dLmmol/Lμmol/Lg/dL ACR < 30 : Normal ACR 30~299 : Microalbuminuria ACR ≥ 300 : Macroalbuminuria, Clinical albuminuria, Overt proteinuria Degree of proteinuria Normal to mildly … Read more
Medical Calculator – SonDoctor.com × nPCR Calculator An indicator for assessing protein intake in dialysis patients PCR (g/kg/day) = 0.22 + {(0.036 x [ID BUN (mg/dL)] x 24) / [interval (hr)]} + {([Urine urea (g)] x 150) / ([interval (hr)] x [weight (kg)])} Previous post-HD BUN (mg/dL): Midweek pre-HD BUN (mg/dL): * For thrice-weekly dialysis, … Read more
Medical Calculator – SonDoctor.com × Anion Gap + Delta AG Delta bicarbonate ratio Calculator Anion gap (AG) = [Na+] – ([Cl-]+[HCO3-]) ※ Correction is required when albumin is low. Corrected AG = AG + 2.5 × (4.5 – albumin) (For every 1 g/dL decrease in albumin from 4.5 g/dL, serum AG decreases by 2.5) Delta … Read more