35 results
True Hyponatremia Differential Algorithm

Instead (or in addition) of volume status examination, check urine sodium and serum
sodium and serum ... sodium low, uric ... sodium high and ... Differential #Algorithm #Diagnosis ... #Nephrology
Fractional Excretion of Sodium - FENa
Fractional Excretion of Sodium (FENa) = (Urine Na+ x Serum Cr)
Fractional Excretion of Sodium ... (FENa) = (Urine ... / (Serum Na+ x Urine ... #nephrology #calculation ... #diagnosis
Hyponatremia Differential Diagnosis Algorithm - Utilizing Uric Acid 
ADH promotes Urea/uric acid excretion along with water
Hyponatremia Differential Diagnosis ... Osmolarity 2) Urine ... Osmolarity 3) Urine ... Sodium 4) Serum ... #Algorithm #nephrology
Cerebral Salt Wasting vs SIADH - Pathophysiology 
1) Neurological event
2) Sodium loss from tubules
3) Naturiesis →
Neurological event 2) Sodium ... → Increased urine ... Pathophysiology #diagnosis ... #nephrology #hyponatremia ... #comparison
General approach to AKI - Checklist

Urine electrolytes & FENa - Previously, it was believed that urine
- Checklist Urine ... sodium excretion ... fractional excretion of sodium ... performance for diagnosing ... AcuteKidneyInjury #Nephrology
Hyponatremia Differential Diagnosis Table

 • Step 1: Correct for hyperglycemia. Corrected Na = [(glucose - 100)/
Hyponatremia Differential Diagnosis ... Serum Osm • Urine ... #Differential #Diagnosis ... #Table #nephrology ... #sodium
Volume Based Approach to Hyponatremia
Hypovolemic, Serum uric acid >4
 • Urine Na <20: Extra-renal losses
 •
uric acid >4 • Urine ... Extra-renal losses • Urine ... uric acid >4 • Urine ... Hyponatremia #algorithm #diagnosis ... #sodium #low #nephrology
Causes of Hypernatremia - Differential Diagnosis Algorithm
Hypernatremia - Excess free water loss, Serum Sodium >145 mmol/L
High
- Differential Diagnosis ... water loss, Serum Sodium ... 145 mmol/L High Urine ... glucosuria Low Urine ... Hypernatremia #Nephrology
Nephritic vs Nephrotic Syndrome

Step 1: If the patient has hematuria and/or proteinuria, think about nephrotic/nephritic syndromes.
Step
dysmorphic RBCs in urine ... Nephrotic #Syndrome #Comparison ... #Algorithm #Nephrology ... #Diagnosis
Atlas of Urine Microscopy Findings
 • Epithelial cells - Normal
 • Renal tubular cells - Acute
Atlas of Urine Microscopy ... Red cell casts - Diagnostic ... glomerular disease • Leukocytes ... Microscopy #Atlas #key #diagnosis ... #nephrology #casts