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Differential Diagnosis of Hypo and Hypermagnesemia #Diagnosis #EM #IM #Differential #Hypormagnesemia #Hypermagnesemia #Ddxof
Differential Diagnosis ... of Hypo and Hypermagnesemia ... Diagnosis #EM #IM #Differential ... #Hypormagnesemia ... #Hypermagnesemia
Approach to Hypomagnesemia 

Fractional excretion of magnesium = (urine magnesium x serum creatinine)/ [0.7 (serum magnesium
Approach to Hypomagnesemia ... = (urine magnesium ... )/ [0.7 (serum magnesium ... @NEPHKIDS1 #Hypomagnesemia ... #algorithm #differential
Hypomagnesemia - Differential Diagnosis
Renal Causes of Hypomagnesemia - Familial:
Bartter syndrome and Gitelman syndrome, Isolated recessive hypomagnesemia,
Hypomagnesemia - ... Differential Diagnosis ... Renal Causes of Hypomagnesemia ... #differential # ... causes #nephrology #magnesium
Causes of Hypermagnesemia
Increased magnesium load
 - Magnesium-containing laxatives, antacids, or enemas
 - Treatment of pre-edampsia/eclampsia (mothers
Causes of Hypermagnesemia ... Increased magnesium ... load - Magnesium-containing ... Addison's disease) #Hypermagnesemia ... Causes #diagnosis #differential
Hypermagnesemia - Etiologies by Mechanism
Renal Failure 
Excessive Mg Administration 
 - Massive PO intake
Hypermagnesemia ... intake - Magnesium ... DrEricStrong #Hypermagnesemia ... #Differential # ... Diagnosis #High #Magnesium
Causes of Hypomagnesemia - Differential Diagnosis Algorithm
GI LOSS - FeMg < 2-2.5% or 24h Urine Mg
Causes of Hypomagnesemia ... - Differential ... @kdjhaveri #Hypomagnesemia ... #Magnesium #Low ... #Causes #Differential
Magnesium Electrolyte Repletion
Oral - Only do if patient does not tolerate IV
 • Magnesium oxide (can
Magnesium Electrolyte ... tolerate IV • Magnesium ... 800mg PO daily • Magnesium ... SatyaPatelMD #Magnesium ... Repletion #management #hypomagnesemia
Chvostek Sign on Physical Exam

Young man presented with history of fatigue, muscle cramps and features suggestive
Chvostek Sign on ... Serum magnesium ... #Chvostek #Sign
Hypomagnesemia - Etiologies by Mechanism

Decreased GI Uptake 
 - Poor dietary intake (particularly common in alcoholics)
Hypomagnesemia - ... Primary intestinal hypomagnesemia ... DrEricStrong #Hypomagnesemia ... #Differential # ... Diagnosis #Low #Magnesium
Hypophosphatemia - Differential Diagnosis Algorithm

Transcellular Shift
 • Recovery From DKA
 • Refeeding Syndrome
 • Acute Respiratory
Hypophosphatemia - Differential ... Hypokalemia • Hypomagnesemia ... : • Aluminum/Magnesium ... #LowPhosphate #Differential