53 results
Hypermagnesemia - Etiologies by Mechanism
Renal Failure 
Excessive Mg Administration 
 - Massive PO intake
Hypermagnesemia ... intake - Magnesium ... DrEricStrong #Hypermagnesemia ... Diagnosis #High #Magnesium ... Table #Causes #Management
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 ... loss, shift of magnesium ... @NEPHKIDS1 #Hypomagnesemia
Magnesium Electrolyte Repletion
Oral - Only do if patient does not tolerate IV
 • Magnesium oxide (can
Magnesium Electrolyte ... tolerate IV • Magnesium ... 800mg PO daily • Magnesium ... Electrolyte #Repletion #management ... #hypomagnesemia
Hypomagnesemia - Differential Diagnosis
Renal Causes of Hypomagnesemia - Familial:
Bartter syndrome and Gitelman syndrome, Isolated recessive hypomagnesemia,
Hypomagnesemia - ... Renal Causes of Hypomagnesemia ... , Familial hypomagnesemia ... Mitochondrial hypomagnesemia ... 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 ... Increased renal magnesium ... Addison's disease) #Hypermagnesemia
Causes of Hypomagnesemia - Differential Diagnosis Algorithm
GI LOSS - FeMg < 2-2.5% or 24h Urine Mg
Causes of Hypomagnesemia ... CNIs • Familial hypomagnesemia ... @kdjhaveri #Hypomagnesemia ... #Magnesium #Low
Potassium Electrolyte Repletion
If patient also has hypomagnesemia, replete magnesium before repleting potassium
Oral:
 • Pills (ask pharmacy
patient also has hypomagnesemia ... , replete magnesium ... Electrolyte #Repletion #management
Symptoms and Signs of Hypomagnesemia
Neuromuscular:
 - Tetany, Muscle weakness, Chvostek and Trousseau signs, Cerebellar (ataxia, nystagmus,
Symptoms and Signs of Hypomagnesemia ... Muscle weakness, Chvostek ... Hypocalcemia, Anemia #Hypomagnesemia ... #magnesium #Symptoms
Chvostek Sign on Physical Exam

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

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