3870 results
Hypomagnesemia - Etiologies by Mechanism

Decreased GI Uptake 
 - Poor dietary intake (particularly common in alcoholics)
Loop and thiazide diuretics ... Hypokalemia - Osmotic diuresis ... Post-obstructive diuresis ... Differential #Diagnosis #Low ... Classification #Causes
Causes of Polyuria - Differential Diagnosis
Excess Intake of Water:
 • Primary polydipsia (a.k.a. "psychogenic polydipsia")
 •
Causes of Polyuria ... a.k.a. osmotic diuresis ... : Conventional diuretics ... • Central Dl (Low ... Differential #Diagnosis #Causes
Primary Metabolic Alkalosis - Differential Diagnosis Algorithm
Volume Depleted - 2° hyperaldosteronism
 • Low Urine Cl-: Vomiting,
hyperaldosteronism • Low ... , NGT suction, Low ... Cl intake, Diuretics ... High Urine Cl-: Diuretics ... Algorithm #Nephrology #Causes
Causes of Hypokalemia - Differential Diagnosis Algorithm
Decreased intake (rare cause in isolation)
GI loss - Urine loss
Causes of Hypokalemia ... Decreased intake (rare cause ... contracted • Loop diuretics ... syndrome • Thiazide diuretics ... artery stenosis Low
Causes of Hypomagnesemia
 • Redistribution: IV glucose, Correction of diabetic ketoacidosis, IV hyperalimentation, Refeeding after starvation,
Causes of Hypomagnesemia ... Saline or osmotic diuresis ... • Drugs: Loop diuretics ... Hypomagnesemia #Causes ... nephrology #magnesium #low
Causes of Metabolic Alkalosis - Differential Diagnosis Algorithm
GI Losses - Gastric
 • Vomiting
 • NG suction
GI
Causes of Metabolic ... tubular transport • Diuretics ... aldosteronism Low ... Renin, Low Aldosterone ... Diagnosis #Algorithm #Causes
Hypomagnesemia - Differential Diagnosis
Renal Causes of Hypomagnesemia - Familial:
Bartter syndrome and Gitelman syndrome, Isolated recessive hypomagnesemia,
Diagnosis Renal Causes ... hypomagnesemia Renal Causes ... renal transplant, Diuretic ... differential #diagnosis #causes ... nephrology #magnesium #low
Causes of Hypomagnesemia - Differential Diagnosis Algorithm
GI LOSS - FeMg < 2-2.5% or 24h Urine Mg
Causes of Hypomagnesemia ... > 10g • Loop Diuretics ... syndrome • Thiazide Diuretics ... Hypomagnesemia #Magnesium #Low ... #Causes #Differential
Hypokalemia Differential Diagnosis Algorithm

Low intake 
• poor oral intake 

Renal loss 
• Medication 
• Hypomagnesemia 
•
Diagnosis Algorithm Low ... Hypomagnesemia • Osmotic diuresis ... Diagnosis #Algorithm #Causes
Hypokalemia - Differential Diagnosis Algorithm
Extra-renal Losses:
 • Normal Acid-Base: Low intake
 • Metabolic acidosis: Gl tract
Normal Acid-Base: Low ... Ureterosigmoidoscopy • HTN, Low ... Loop and thiazide diuretics ... Diagnosis #Algorithm #causes ... #potassium #low