11 results
Polyuria - Differential Diagnosis Algorithm
Polyuria = >3L Urine output / 24 hours
Urine osmolality = 2 (Na
Diagnosis Algorithm ... Polyuria = >3L ... nutrition), Azotemia LOW ... #Differential #Diagnosis ... #Algorithm #nephrology
Fractional Excretion of Sodium - FENa
Fractional Excretion of Sodium (FENa) = (Urine Na+ x Serum Cr)
Sodium (FENa) = (Urine ... / (Serum Na+ x Urine ... - Strong Medicine ... Excretion #Sodium #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
Approach to Hypomagnesemia 

Fractional excretion of magnesium = (urine magnesium x serum creatinine)/ [0.7 (serum magnesium
Hypomagnesemia Fractional ... of magnesium = (urine ... #differential #diagnosis ... #causes #nephrology ... #magnesium #low
Causes of Hypernatremia - Differential Diagnosis Algorithm
Hypernatremia - Excess free water loss, Serum Sodium >145 mmol/L
High
- Differential Diagnosis ... diuresis (see Polyuria ... mannitol, glucosuria Low ... Urine Osmolality ... Hypernatremia #Nephrology
Fractional Excretion of Urea - FEurea
Fractional Excretion of Urea (FEurea) = (Urine Urea x Serum Cr)
Urea (FEurea) = (Urine ... (Serum Urea x Urine ... - Strong Medicine ... #Urea #FEUrea #nephrology ... #calculation #diagnosis
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
Hepatorenal Syndrome Diagnosis
 • ↑ in serum Cr of ≥ 0.3mg/dL above baseline
Hepatorenal Syndrome Diagnosis ... type 2 HRS) • Low ... urine Na+ (<10 ... - Strong Medicine ... #HRS #nephrology
Metabolic Alkalosis - Urinary Chloride Algorithm
Cl- responsive metabolic alkalosis
 • Kidney loss of Cl-
alkalosis • Normal/low ... Urine chloride is ... in the proximal tubule ... #Algorithm #nephrology ... #differential #diagnosis
How do you work up an ischemic CVA?
A) Initial Evaluation
 • ABCs
 • IV access, monitor
How do you work ... suspicion) • +/- bubble ... ischemic #CVA #stroke ... #workup #diagnosis ... #checklist #neurology