NEPHROLOGY

Medical Calculator – SonDoctor.com × FENa Calculator (Fractional Excretion of Sodium) FENa(%) = (Na clearance / Cr clearance) × 100 = (((Urine Na × V)/ Serum Na) / ((Urine Cr × V) / Serum Cr)) × 100 = (Urine Na × Serum Cr) / (Serum Na × Urine Cr) × 100 Serum Sodium (mmol/L) : … Read more

Medical Calculator – SonDoctor.com X Creatinine Clearance Using 24-Hour Urine Ccr (mL/min) = (Urine Cr × (Urine Volume [24hr urine] / 1440)) / Serum Cr (BSA correction(1.73/BSA) is recommended for accurate GFR assessment) Ccr (mL/min/1.73㎡) = {(Urine Cr × (Urine Volume / 1440)) / Serum Cr} × (1.73[㎡] / BSA[㎡]) BSA (Mosteller) : √[(Height(cm) × … Read more

Medical Calculator – SonDoctor.com X Osmolality Calculator Calculated Osm = (2 × Na) + (glucose / 18) + (BUN / 2.8) Effective Osm = (2 × Na) + (glucose / 18) (BUN crosses cell membranes freely and has minimal osmotic effect) Osmolar gap = Measured Osm – Calculated Osm Serum Sodium (mmol/L) : Serum Glucose … Read more

Medical Calculator – SonDoctor.com X Urine K-to-Creatinine Ratio Calculator Estimate daily potassium excretion using spot urine chemistry. Urine K/Cr ratio : mEq K / g Cr (K in mmol = mEq) Urine K (mmol/L) : Urine Cr (mg/dL) :

Medical Calculator – SonDoctor.com X TTKG Calculator Net K secretion by distal nephron before the effect of ADH, correcting for water reabsorption via urine osmolality. TTKG = (Urine K / Plasma K) × (Plasma Osm / Urine Osm) Urine K (mmol/L) : Urine Osm (mOsm/kg) : Plasma K (mmol/L) : Plasma Osm (mOsm/kg) : ※ … Read more

Medical Calculator – SonDoctor.com X Corrected Calcium Calculator in Hypoalbuminemia At pH 7.4, for every 1.0 g/dL drop in albumin (from 4.0), calcium decreases by 0.8 mg/dL. Corrected Ca (mg/dL) = Ca + ((4 – alb) x 0.8) Serum Calcium (mEq/L) : Serum Albumin (g/dL) :

Medical Calculator – SonDoctor.com × Corrected Sodium Calculator in Hyperglycemia Based on glucose level of 100, sodium decreases by 1.6 for every 100 mg/dL increase in glucose. Corrected Na = Na + (1.6 × (glucose – 100) / 100) Serum Sodium (mEq/L) : Serum Glucose (mg/dL) :

Medical Calculator – SonDoctor.com X Estimated Glomerular Filtration Rate (eGFR) Calculator (2) CKD-EPI Creatinine-Cystatin C equation (2021) Serum Creatinine (mg/dL) : Serum Cystatin C (mg/L) : Age (year) : Male | Female eGFR (1) : CKD-EPI (2021) Creatinine formula (mL/min/1.73㎡) eGFR (2) : CKD-EPI (2012) Cystatin C formula (mL/min/1.73㎡) eGFR (3) : CKD-EPI (2021) Cr-Cystatin … Read more

Medical Calculator – SonDoctor.com × Calculate URR and Kt/V URR = (1 – [Post-dialysis Urea / Pre-dialysis Urea]) × 100 Kt/V = -ln(R – 0.008 × t) + (4 – 3.5 × R) × UF/W R: Post-dialysis Urea / Pre-dialysis Urea t: Dialysis time (hours) UF: Ultrafiltration volume (L) W: Post-dialysis weight (kg) Pre-dialysis BUN … Read more

Medical Calculator – SonDoctor.com × Estimated Glomerular Filtration Rate (eGFR) Calculator This calculator simultaneously computes four estimated glomerular filtration rate (eGFR) formulas. ※Body weight is only needed for Cockcroft-Gault formula. Serum Creatinine (mg/dL) : Age (year) : [Optional] Weight (kg) : Male | Female Check if patient is Black eGFR (1): Cockcroft-Gault formula (mL/min) eGFR … Read more