109 results
Checklist Approach to Hypokalemia

Consider risk factors for arrhythmia:
 - EKG changes (especially QT prolongation)
 - Digoxin
Evaluation - Check magnesium ... EKG) Consider magnesium ... 3.5 - Severe renal ... deficit. ... function & estimated deficit
Approach to Hypomagnesemia 

Fractional excretion of magnesium = (urine magnesium x serum creatinine)/ [0.7 (serum magnesium
cells FEMg >4% = renal ... if renal function ... Hypomagnesemia #algorithm #differential ... #diagnosis #causes ... #nephrology #magnesium
Causes of Hyperkalemia

Hyperkalemia is caused by excess potassium intake, impaired potassium excretion, or transcellular shifts. The
Causes of Hyperkalemia ... with impaired renal ... and underlying renal ... #Hyperkalemia #Differential ... #Causes
Hypomagnesemia - Differential Diagnosis
Renal Causes of Hypomagnesemia - Familial:
Bartter syndrome and Gitelman syndrome, Isolated recessive hypomagnesemia,
Hypomagnesemia - Differential ... Diagnosis Renal ... Causes of Hypomagnesemia ... Hypomagnesemia #differential ... #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 ... Rhabdomyolysis Increased renal ... Hypermagnesemia #Causes ... #diagnosis #differential
Hypermagnesemia - Etiologies by Mechanism
Renal Failure 
Excessive Mg Administration 
 - Massive PO intake
by Mechanism Renal ... intake - Magnesium ... Hypermagnesemia #Differential ... Diagnosis #High #Magnesium ... #Table #Causes
Causes of Hypomagnesemia - Differential Diagnosis Algorithm
GI LOSS - FeMg < 2-2.5% or 24h Urine Mg
- Differential ... Malabsorption RENAL ... ab • Genetics defects ... Hypomagnesemia #Magnesium ... #Low #Causes #Differential
Hyperkalemia: Diagnostic algorithm
Decreased renal potassium excretion
 • Acute renal failure
 • Chronic renal failure
 • Drugs
Increased
algorithm Decreased renal ... potassium excretion ... • Acute renal ... Diagnosis #algorithm #nephrology ... #potassium #differential
Causes of Hyperkalemia - Differential Diagnosis Algorithm
 • Increased Intake
 • Reduced Excretion (IV potassium with
Causes of Hyperkalemia ... - Differential ... Excretion (IV potassium ... #Hyperkalemia #Nephrology ... #Differential #
Causes of Hypokalemia - Differential Diagnosis Algorithm
Defining the cause of hypokalemia starts by measuring urinary K
- Differential ... gastrointestinal K loss • Renal ... hypokalemia • Renal ... #hypokalemia #differential ... #nephrology #potassium