Thursday, June 18, 2026

Help yourself learn/memorize 50 terms from Krebs Cycle

Citric Acid Cycle Spaced Repetition Flashcards

Krebs Cycle Mastery (SM2 Algorithm)

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Pediatric Renal Function and GFR Calculator - 12 Formulae

eGFR (estimated glomerular filtration rate) is a standard measure of kidney function. The calculation determines how effectively your kidneys filter waste based on your age, gender, and blood creatinine levels. To diagnose Chronic Kidney Disease (CKD), doctors look for an eGFR that remains under 60 for a three-month period. For most people, a normal reading is 90 or above, but "normal" is relative and shifts with age and demographic traits.

Pediatric eGFR Comprehensive Database Calculator

Adjust the patient metrics below to see all 12 historical and modern pediatric equations compute simultaneously in real-time.

Pediatric eGFR Formulae Patreon and LinkedIn links LinkedIn Profile /usmanzafarparacha /usmanzafarparacha /usmanzafarparacha LinkedIn Patreon profile /uzparacha /uzparacha /uzparacha Patreon Usman Zafar Paracha 1 Usman Zafar Paracha Usman Zafar Paracha Original Schwartz (1976) Original Schwartz (1976) Original Schwartz (1976) eGFR = (0.55 × Body height or length (cm)) / serum creatinine (mg/dL) eGFR = (0.55 × Body height or length (cm)) / serum creatinine... eGFR = (0.55 × Body height or length (cm)) / serum creatinine (mg/dL) syntax syntax syntax The foundational pediatric eGFR formula using a constant of 0.55 × height/Scr, derived from inulin clearance studies in children. The foundational pediatric eGFR formula using a constant of 0... The foundational pediatric eGFR formula using a constant of 0.55 × height/Scr, derived from inulin clearance studies in children. Page Break 1 Patreon and LinkedIn links.1186 LinkedIn Profile.1187 /usmanzafarparacha /usmanzafarparacha /usmanzafarparacha LinkedIn Patreon profile.1189 /uzparacha /uzparacha /uzparacha Patreon Usman Zafar Paracha 2 Usman Zafar Paracha Usman Zafar Paracha Infant Schwartz (1984) Infant Schwartz (1984) Infant Schwartz (1984) eGFR = (0.45 × Body height or length (cm)) / serum creatinine (mg/dL) eGFR = (0.45 × Body height or length (cm)) / serum creatinine... eGFR = (0.45 × Body height or length (cm)) / serum creatinine (mg/dL) syntax2 syntax syntax A refinement for infants under 1 year using a lower k-constant (0.45) to reflect immature renal tubular function. A refinement for infants under 1 year using a lower k-constan... A refinement for infants under 1 year using a lower k-constant (0.45) to reflect immature renal tubular function. Page Break 2 Patreon and LinkedIn links.1197 LinkedIn Profile.1198 /usmanzafarparacha /usmanzafarparacha /usmanzafarparacha LinkedIn Patreon profile.1200 /uzparacha /uzparacha /uzparacha Patreon Usman Zafar Paracha 1.1202 Usman Zafar Paracha Usman Zafar Paracha Adolescent Male Schwartz (1976) Adolescent Male Schwartz (1976) Adolescent Male Schwartz (1976) eGFR = (0.70 × Body height or length (cm)) / serum creatinine (mg/dL) eGFR = (0.70 × Body height or length (cm)) / serum creatinine... eGFR = (0.70 × Body height or length (cm)) / serum creatinine (mg/dL) syntax 3 syntax syntax An extension of the original Schwartz formula using k = 0.70 for post-pubertal males to account for increased muscle mass. An extension of the original Schwartz formula using k = 0.70 ... An extension of the original Schwartz formula using k = 0.70 for post-pubertal males to account for increased muscle mass. Page Break 3 Patreon and LinkedIn links.1208 LinkedIn Profile.1209 /usmanzafarparacha /usmanzafarparacha /usmanzafarparacha LinkedIn Patreon profile.1211 /uzparacha /uzparacha /uzparacha Patreon Usman Zafar Paracha 1.1213 Usman Zafar Paracha Usman Zafar Paracha Preterm Infant Brion Preterm Infant Brion Preterm Infant Brion eGFR = (0.33 × Body height or length (cm)) / serum creatinine (mg/dL) eGFR = (0.33 × Body height or length (cm)) / serum creatinine... eGFR = (0.33 × Body height or length (cm)) / serum creatinine (mg/dL) syntax 4 syntax syntax Designed specifically for preterm neonates using k = 0.33, reflecting their significantly reduced GFR relative to gestational age. Designed specifically for preterm neonates using k = 0.33, re... Designed specifically for preterm neonates using k = 0.33, reflecting their significantly reduced GFR relative to gestational age. Page Break 4 Patreon and LinkedIn links.1219 LinkedIn Profile.1220 /usmanzafarparacha /usmanzafarparacha /usmanzafarparacha LinkedIn Patreon profile.1222 /uzparacha /uzparacha /uzparacha Patreon Usman Zafar Paracha 1.1224 Usman Zafar Paracha Usman Zafar Paracha Modern Bedside Schwartz (2009) Modern Bedside Schwartz (2009) Modern Bedside Schwartz (2009) eGFR = (0.413 × Body height or length (cm)) / serum creatinine (mg/dL) eGFR = (0.413 × Body height or length (cm)) / serum creatinin... eGFR = (0.413 × Body height or length (cm)) / serum creatinine (mg/dL) syntax 5 syntax syntax A recalibrated version using k = 0.413, derived with IDMS-traceable creatinine assays, now the widely adopted clinical standard. A recalibrated version using k = 0.413, derived with IDMS-tra... A recalibrated version using k = 0.413, derived with IDMS-traceable creatinine assays, now the widely adopted clinical standard. Page Break 5 Patreon and LinkedIn links.1230 LinkedIn Profile.1231 /usmanzafarparacha /usmanzafarparacha /usmanzafarparacha LinkedIn Patreon profile.1233 /uzparacha /uzparacha /uzparacha Patreon Usman Zafar Paracha 1.1235 Usman Zafar Paracha Usman Zafar Paracha Counahan-Barratt Equation Counahan-Barratt Equation Counahan-Barratt Equation eGFR = (0.43 × Body height or length (cm)) / serum creatinine (mg/dL) eGFR = (0.43 × Body height or length (cm)) / serum creatinine... eGFR = (0.43 × Body height or length (cm)) / serum creatinine (mg/dL) syntax 6 syntax syntax A British-derived formula using k = 0.43 based on plasma creatinine measured against chromogen methods in children aged 1–14. A British-derived formula using k = 0.43 based on plasma crea... A British-derived formula using k = 0.43 based on plasma creatinine measured against chromogen methods in children aged 1–14. Page Break 6 Patreon and LinkedIn links.1241 LinkedIn Profile.1242 /usmanzafarparacha /usmanzafarparacha /usmanzafarparacha LinkedIn Patreon profile.1244 /uzparacha /uzparacha /uzparacha Patreon Usman Zafar Paracha 1.1246 Usman Zafar Paracha Usman Zafar Paracha Schwartz-Lyon Variation Schwartz-Lyon Variation Schwartz-Lyon Variation eGFR = (0.373 × Body height or length (cm)) / serum creatinine (mg/dL) eGFR = (0.373 × Body height or length (cm)) / serum creatinin... eGFR = (0.373 × Body height or length (cm)) / serum creatinine (mg/dL) syntax 7 syntax syntax A sex-differentiated adaptation of the Schwartz formula using age- and sex-specific k values (0.419 male / 0.373 female) for greater precision. A sex-differentiated adaptation of the Schwartz formula using... A sex-differentiated adaptation of the Schwartz formula using age- and sex-specific k values (0.419 male / 0.373 female) for greater precision. Page Break 7 Patreon and LinkedIn links.1252 LinkedIn Profile.1253 /usmanzafarparacha /usmanzafarparacha /usmanzafarparacha LinkedIn Patreon profile.1255 /uzparacha /uzparacha /uzparacha Patreon Usman Zafar Paracha 1.1257 Usman Zafar Paracha Usman Zafar Paracha Flanders Metadata Equation Flanders Metadata Equation Flanders Metadata Equation eGFR = (k × Body height or length (cm)) / serum creatinine (mg/dL) eGFR = (k × Body height or length (cm)) / serum creatinine (m... eGFR = (k × Body height or length (cm)) / serum creatinine (mg/dL)(k = 0.0414 × ln(age) + 0.3018) syntax 8 syntax syntax An age-dependent k-constant model (k = 0.0414 × ln(age) + 0.3018) derived from a large Belgian pediatric meta-analysis. An age-dependent k-constant model (k = 0.0414 × ln(age) + 0.3... An age-dependent k-constant model (k = 0.0414 × ln(age) + 0.3018) derived from a large Belgian pediatric meta-analysis. Page Break 8 Patreon and LinkedIn links.1263 LinkedIn Profile.1264 /usmanzafarparacha /usmanzafarparacha /usmanzafarparacha LinkedIn Patreon profile.1266 /uzparacha /uzparacha /uzparacha Patreon Usman Zafar Paracha 1.1268 Usman Zafar Paracha Usman Zafar Paracha Simple Height-Independent Simple Height-Independent Simple Height-Independent eGFR = 107.3 / (serum creatinine (mg/dL) / Q) eGFR = 107.3 / (serum creatinine (mg/dL) / Q) (Q = 0.0270 × a... eGFR = 107.3 / (serum creatinine (mg/dL) / Q)(Q = 0.0270 × age + 0.2329) syntax 9 syntax syntax Estimates GFR using age alone without height input, useful when height measurements are unavailable. Estimates GFR using age alone without height input, useful wh... Estimates GFR using age alone without height input, useful when height measurements are unavailable. Page Break 9 Patreon and LinkedIn links.1275 LinkedIn Profile.1276 /usmanzafarparacha /usmanzafarparacha /usmanzafarparacha LinkedIn Patreon profile.1278 /uzparacha /uzparacha /uzparacha Patreon Usman Zafar Paracha 1.1280 Usman Zafar Paracha Usman Zafar Paracha FAS Age Equation FAS Age Equation FAS Age Equation eGFR = 107.3 / (Serum Creatinine (mg/dL) / Q_age) [Q=0.921] eGFR = 107.3 / (Serum Creatinine (mg/dL) / Q_age) [Q=0.921] eGFR = 107.3 / (Serum Creatinine (mg/dL) / Q_age) [Q=0.921] syntax 10 syntax syntax Part of the Full Age Spectrum framework, this uses a polynomial age-based Q-value normalized to 107.3 for a unified creatinine-based GFR estimate across all ages. Part of the Full Age Spectrum framework, this uses a polynomi... Part of the Full Age Spectrum framework, this uses a polynomial age-based Q-value normalized to 107.3 for a unified creatinine-based GFR estimate across all ages. Page Break 10 Patreon and LinkedIn links.1286 LinkedIn Profile.1287 /usmanzafarparacha /usmanzafarparacha /usmanzafarparacha LinkedIn Patreon profile.1289 /uzparacha /uzparacha /uzparacha Patreon Usman Zafar Paracha 1.1291 Usman Zafar Paracha Usman Zafar Paracha FAS Height Equation FAS Height Equation FAS Height Equation syntax 11 syntax syntax The height-based variant of the Full Age Spectrum model, deriving Q from a quadratic height function for improved accuracy when exact age is uncertain. The height-based variant of the Full Age Spectrum model, deri... The height-based variant of the Full Age Spectrum model, deriving Q from a quadratic height function for improved accuracy when exact age is uncertain. Page Break 10.1295 eGFR = 107.3 / (0.45 / Q_ht) [Q_ht=0.317] eGFR = 107.3 / (0.45 / Q_ht) [Q_ht=0.317] eGFR = 107.3 / (0.45 / Q_ht) [Q_ht=0.317] Patreon and LinkedIn links.1297 LinkedIn Profile.1298 /usmanzafarparacha /usmanzafarparacha /usmanzafarparacha LinkedIn Patreon profile.1300 /uzparacha /uzparacha /uzparacha Patreon Usman Zafar Paracha 1.1302 Usman Zafar Paracha Usman Zafar Paracha Léger Equation (Absolute) Léger Equation (Absolute) Léger Equation (Absolute) syntax 12 syntax syntax A weight-augmented formula yielding absolute (non-indexed) clearance in mL/min, useful when body surface area normalization is not desired. A weight-augmented formula yielding absolute (non-indexed) cl... A weight-augmented formula yielding absolute (non-indexed) clearance in mL/min, useful when body surface area normalization is not desired. Page Break 10.1306 eGFR = (56.7 × body weight (kg) + 0.142 × (body height or length (cm))²) / serum creatinine (mg/dL) eGFR = (56.7 × body weight (kg) + 0.142 × (body height or len... eGFR = (56.7 × body weight (kg) + 0.142 × (body height or length (cm))²) / serum creatinine (mg/dL) References References Schwartz, G. J., Haycock, G. B., Edelmann Jr, C. M... ReferencesSchwartz, G. J., Haycock, G. B., Edelmann Jr, C. M., & Spitzer, A. (1976). A simple estimate of glomerular filtration rate in children derived from body length and plasma creatinine. Pediatrics, 58(2), 259-263.Schwartz, G. J., Feld, L. G., & Langford, D. J. (1984). A simple estimate of glomerular filtration ratein full-term infants during the first year of life. The Journal of pediatrics, 104(6), 849-854.Brion, L. P., Fleischman, A. R., McCarton, C., & Schwartz, G. J. (1986). A simple estimate of glomerular filtration rate in low birth weight infants during the first year of life: noninvasive assessment of body composition and growth. The Journal of pediatrics, 109(4), 698-707.Schwartz, G. J., Mun, A., Schneider, M. F., Mak, R. H., Kaskel, F., Warady, B. A., & Furth, S. L. (2009). New equations to estimate GFR in children with CKD. Journal of the American Society of Nephrology, 20(3), 629-637.Counahan, R., Chantler, C., Ghazali, S., Kirkwood, B. E. T. T. Y., Rose, F. R. A. N. C. E. S., & Barratt, T. M. (1976). Estimation of glomerular filtration rate from plasma creatinine concentration in children. Archives of disease in childhood, 51(11), 875-878.Hoste, L., Dubourg, L., Selistre, L., De Souza, V. C., Ranchin, B., Hadj-Aïssa, A., ... & Pottel, H. (2014). A new equation to estimate the glomerular filtration rate in children, adolescents and young adults. Nephrology Dialysis Transplantation, 29(5), 1082-1091.Léger, F., Bouissou, F., Coulais, Y., Tafani, M., & Chatelut, E. (2002). Estimation of glomerular filtration rate in children. Pediatric nephrology, 17(11), 903-907.Pottel, H., Hoste, L., & Martens, F. (2012). A simple height-independent equation for estimating glomerular filtration rate in children. Pediatric Nephrology, 27(6), 973-979.Pottel, H., Delanaye, P., Schaeffner, E., Dubourg, L., Eriksen, B. O., Melsom, T., ... & Ebert, N. (2017). Estimating glomerular filtration rate for the full age spectrum from serum creatinine and cystatin C. Nephrology Dialysis Transplantation, 32(3), 497-507.Pottel, H., Mottaghy, F. M., Zaman, Z., & Martens, F. (2010). On the relationship between glomerular filtration rate and serum creatinine in children. Pediatric nephrology, 25(5), 927-934. Note: This calculator is for educational purpose. You may need to take expert advise regarding woking of your kidneys.
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