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
Medical Calculator – SonDoctor.com × Infusion Rate Calculator for Hyponatremia or Hypernatremia Treatment (Adrogue-Madias formula) Calculate infusion rates for Hyponatremia or Hypernatremia treatment using the Adrogue-Madias formula. Infusion rate [mL/hr] = ( Na correction rate[mEq/L/hr] / (((infusate Na+infusate K)-Serum Na) / (TBW+1)) )×1000 ※ TBW (Total Body Water) = Body weight × 0.6 (0.5, if … Read more
Medical Calculator – SonDoctor.com × Calculator for Serum Na Change After Infusion (Adrogue-Madias Formula) Adrogue-Madias formula Δ[serum Na](mEq/L) = ([Infusion Na] + [Infusion K] – [Serum Na]) ÷ (TBW(L) + V(L)) ※ TBW (Total Body Water) = Body weight × 0.6 (0.5, if female) ※ V : volume of infusion (L) ※ For Na and … Read more
Medical Calculator – SonDoctor.com × Hyponatremia Treatment – 3% Saline Infusion Rate Calculator (Adrogue-Madias Formula) This calculator uses the Adrogue-Madias formula to determine the infusion rate of 3% saline during the initial treatment of Hyponatremia. Infusion rate of 3% Saline[mL/hr] = ( (Target Na-Serum Na) / ((513-Serum Na) / (TBW+1)) / Target period[hr] )×1000 ※ … Read more