309 results
Approach to Hypomagnesemia 

Fractional excretion of magnesium = (urine magnesium x serum creatinine)/ [0.7 (serum magnesium
of magnesium = (urine ... serum magnesium x urine ... intake, Gl loss, shift ... cells FEMg >4% = renal ... diagnosis #causes #nephrology
Workup for Hypophosphatemia - Differential Diagnosis Framework
Rule out spurious hypophosphatemia: paraproteinemia, acute leukemia
Measure Urine Fractional Excretion
leukemia Measure Urine ... Transcellular Shift ... FEPO4 ≥ 5% - Renal ... Workup #phosphate #nephrology
Causes of Hypokalemia - Differential Diagnosis Algorithm
Decreased intake (rare cause in isolation)
GI loss - Urine loss
isolation) GI loss - Urine ... Transcellular shift ... aldosterone • Renal ... #Hypokalemia #Nephrology
Rhabdomyolysis - Differential Diagnosis Framework and Management Summary

Causes of Rhabdomyolysis:
 • Trauma:
	- Immobilization
	- Crush injury
	- Compartment
Weakness - Dark urine ... Shift of extracellular ... perfusion → renal ... hour with goal urine ... causes #treatment #nephrology
Hypokalemia - Differential Diagnosis Algorithm

Transcellular Shift:
 • Alkalosis
 • ↑ beta-2 adrenergic simulation 
 • Erythropoiesis
Transcellular Shift ... Medications Renal ... Losses Non-renal ... Transcellular shifts ... Diagnosis #Algorithm #nephrology
General approach to AKI - Checklist

Urine electrolytes & FENa - Previously, it was believed that urine
- Checklist Urine ... believed that urine ... differentiate between pre-renal ... and intrinsic renal ... AcuteKidneyInjury #Nephrology
Renal Tubular Acidosis - Differential Diagnosis Algorithm
Decreased Serum K, Urine pH < 5.5 - Proximal RTA
Decreased
Renal Tubular Acidosis ... Decreased Serum K, Urine ... = Hyperkalemic Renal ... uncimchiefs #RTA #Renal ... Diagnosis #Algorithm #nephrology
Normal Anion-Gap Acidosis (NAGMA) - Differential Diagnosis Framework and Workup

NAGMA
- Chem, ABG or VBG
- Calculate Anion
- RenalUrine ... Renal Loss of HCO3 ... - Renal insufficiency ... Hypoaldosteronism - Renal ... Diagnosis #Workup #nephrology
Volume Based Approach to Hyponatremia
Hypovolemic, Serum uric acid >4
 • Urine Na <20: Extra-renal losses
 •
Na <20: Extra-renal ... losses • Urine ... Na >30: Renal losses ... Na > 30: Renal ... #sodium #low #nephrology
Polyuria - Differential Diagnosis Algorithm
Urine Output > 3L /day
Water Diuresis (Urine Osm <100 mOsm/kg)
 • Primary
Diagnosis Algorithm Urine ... Water Diuresis (Urine ... Mixed Diuresis (Urine ... Dl • Chronic Renal ... Algorithm #causes #nephrology