16 results
Fractional Excretion of Sodium - FENa
Fractional Excretion of Sodium (FENa) = (Urine Na+ x Serum Cr)
) = (Urine Na+ x ... / (Serum Na+ x Urine ... - Strong Medicine ... #Sodium #nephrology ... #calculation #diagnosis
Hyponatremia Differential Diagnosis Algorithm - Utilizing Uric Acid 
ADH promotes Urea/uric acid excretion along with water
Hyponatremia Differential ... Diagnosis Algorithm ... Urea/uric acid excretion ... Sodium 4) Serum ... #nephrology #sodium
Polyuria - Differential Diagnosis Algorithm
Polyuria = >3L Urine output / 24 hours
Urine osmolality = 2 (Na
Polyuria - Differential ... Diagnosis Algorithm ... nutrition), Azotemia LOW ... #Differential # ... #nephrology
True Hyponatremia Differential Algorithm

Instead (or in addition) of volume status examination, check urine sodium and serum
True Hyponatremia Differential ... sodium low, uric ... uric acid low in ... #Algorithm #Diagnosis ... #Nephrology
General approach to AKI - Checklist

Urine electrolytes & FENa - Previously, it was believed that urine
sodium excretion ... of sodium (FENa ... ) could help differentiate ... performance for diagnosing ... AcuteKidneyInjury #Nephrology
Causes of Polyuria - Differential Diagnosis
Excess Intake of Water:
 • Primary polydipsia (a.k.a. "psychogenic polydipsia")
 •
- Differential ... Diagnosis Excess ... • Central Dl (Low ... Mimics (↑ urine ... #nephrology
Causes of Hypernatremia - Differential Diagnosis Algorithm
Hypernatremia - Excess free water loss, Serum Sodium >145 mmol/L
High
Diagnosis Algorithm ... water loss, Serum Sodium ... diuresis (see Polyuria ... mannitol, glucosuria Low ... Hypernatremia #Nephrology
Metabolic Alkalosis - Urinary Chloride Algorithm
Cl- responsive metabolic alkalosis
 • Kidney loss of Cl-
alkalosis • Normal/low ... sodium is typically ... #Algorithm #nephrology ... #differential # ... diagnosis
Approach to Hypomagnesemia 

Fractional excretion of magnesium = (urine magnesium x serum creatinine)/ [0.7 (serum magnesium
Fractional excretion ... Hypomagnesemia #algorithm #differential ... #diagnosis #causes ... #nephrology #magnesium ... #low
Normal Anion-Gap Acidosis (NAGMA) - Differential Diagnosis Framework and Workup

NAGMA
- Chem, ABG or VBG
- Calculate Anion
Acidosis (NAGMA) - Differential ... Diagnosis Framework ... • Impaired H+ secretion ... #Diagnosis #Workup ... #nephrology