7 results
Approach to Hypomagnesemia 

Fractional excretion of magnesium = (urine magnesium x serum creatinine)/ [0.7 (serum magnesium
poor intake, Gl loss ... cells FEMg >4% = renal ... magnesium loss ... if renal function ... Hypomagnesemia #algorithm
Hypernatremia Diagnosis and Workup

Step 1 . Repeat the sodium concentration.
Step 2.  Check plasma osmolality.
NORMAL PLASMA
Diagnosis and Workup ... volume loss ... volume loss ... hypothyroidism • adrenal ... #Algorithm #Nephrology
Hypomagnesemia - Etiologies by Mechanism

Decreased GI Uptake 
 - Poor dietary intake (particularly common in alcoholics)
diarrhea / IBD Renal ... Loses - Medications ... tubular dysfunction ... Diagnosis #Low #Magnesium ... Classification #Causes #Workup
Causes of Hypomagnesemia - Differential Diagnosis Algorithm
GI LOSS - FeMg < 2-2.5% or 24h Urine Mg
Differential Diagnosis Algorithm ... GI LOSS - FeMg ... Malabsorption RENAL ... LOSS - FeMg > 2 ... Hypomagnesemia #Magnesium
Hypernatremia - Differential Diagnosis Workup Algorithm

1) Check Urine Osmolality:
 > 600 mOsm/kg - Implies extrarenal mechanism
Differential Diagnosis Workup ... Algorithm 1) ... ): GI loss, Skin ... Differential #Diagnosis #Workup ... #Algorithm #nephrology
Anosmia / Smell Dysfunction - Differential Diagnosis Algorithm
Nasal Obstruction/ URTI:
 • Septal Deviation
 • Allergic Rhinitis
Anosmia / Smell Dysfunction ... Differential Diagnosis Algorithm ... Hypofunction • Adrenal ... #Loss #Differential ... #Diagnosis #Algorithm
Causes of Hypokalemia - Differential Diagnosis Algorithm
Decreased intake (rare cause in isolation)
GI loss - Urine loss
Differential Diagnosis Algorithm ... isolation) GI loss ... - Urine loss <20mmol ... Gittelman's syndrome • Magnesium ... aldosterone • Renal