9 results
Fractional Excretion of Sodium - FENa
Fractional Excretion of Sodium (FENa) = (Urine Na+ x Serum Cr)
Fractional Excretion ... (FENa) = (Urine ... / (Serum Na+ x Urine ... #nephrology #calculation ... #diagnosis
Approach to Hypomagnesemia 

Fractional excretion of magnesium = (urine magnesium x serum creatinine)/ [0.7 (serum magnesium
Hypomagnesemia Fractional ... excretion of magnesium ... #differential #diagnosis ... #causes #nephrology ... #magnesium #low
Fractional Excretion of Urea - FEurea
Fractional Excretion of Urea (FEurea) = (Urine Urea x Serum Cr)
Fractional Excretion ... (FEurea) = (Urine ... (Serum Urea x Urine ... #FEUrea #nephrology ... #calculation #diagnosis
Causes of Polyuria - Differential Diagnosis
Excess Intake of Water:
 • Primary polydipsia (a.k.a. "psychogenic polydipsia")
 •
- Differential Diagnosis ... • Central Dl (Low ... Mimics (↑ urine ... - Strong Medicine ... #Causes #nephrology
Workup for Hypophosphatemia - Differential Diagnosis Framework
Rule out spurious hypophosphatemia: paraproteinemia, acute leukemia
Measure Urine Fractional Excretion
- Differential Diagnosis ... leukemia Measure Urine ... Fractional Excretion ... • Normal or Low ... Workup #phosphate #nephrology
Metabolic Alkalosis - Urinary Chloride Algorithm
Cl- responsive metabolic alkalosis
 • Kidney loss of Cl-
alkalosis • Normal/low ... result of increased excretion ... in the proximal tubule ... #Algorithm #nephrology ... #differential #diagnosis
Rhabdomyolysis - Differential Diagnosis Framework and Management Summary

Causes of Rhabdomyolysis:
 • Trauma:
	- Immobilization
	- Crush injury
	- Compartment
- Differential Diagnosis ... Heat injury, Heat stroke ... Weakness - Dark urine ... hour with goal urine ... #nephrology
Hyperkalemia - Diagnosis and Management - GrepMed Handbook

S/Sx: Most pts asymptomatic. Weakness, cramping, nausea, paresthesias, palpitations,
• ↓ Renal K+ Excretion ... lysis) ± Urine ... suggests ↓ renal excretion ... acidosis) • Low ... #potassium #nephrology
Gitelman Syndrome Overview

What?
• Inherited (AR) hypokalemic salt-losing tubulopathies affecting the thiazide-sensitive sodium chloride cotransporter
• Gitelman's syndrome
alkalosis • Normal or low ... Hypocalciuria (spot urine ... Rhabdomyolysis Treatment ... Gitelman #Syndrome #diagnosis ... #nephrology #management