2146 results
Causes of Hypernatremia - Differential Diagnosis Algorithm
Hypernatremia - Excess free water loss, Serum Sodium >145 mmol/L
High
Excess free water loss ... access to water GI loss ... Diarrhea Insensible loss ... exercise-related loss ... Hypernatremia #Nephrology
Causes of Metabolic Acidosis - Gap and Non-Gap - Differential Diagnosis Algorithm
 • Elevated Anion Gap
Anion Gap (<14) (Loss ... AnionGap #NonGap #Nephrology
Approach to Hypomagnesemia 

Fractional excretion of magnesium = (urine magnesium x serum creatinine)/ [0.7 (serum magnesium
poor intake, Gl loss ... renal magnesium loss ... diagnosis #causes #nephrology
Causes of Non-Gap Metabolic Acidosis - Differential Diagnosis Algorithm
Normal Anion Gap (<14) (Loss of Bicarbonate) -
Anion Gap (<14) (Loss ... gap GI Tract Loss ... Fistula Renal Loss ... - Direct Loss Negative ... MetabolicAcidosis #NonGap #Nephrology
Hypernatremia - Differential Diagnosis Workup Algorithm

1) Check Urine Osmolality:
 > 600 mOsm/kg - Implies extrarenal mechanism
Hypovolemic (H2O loss ... ): GI loss, Skin ... loss • Euvolemic ... Workup #Algorithm #nephrology
Hypernatremia Diagnosis and Workup

Step 1 . Repeat the sodium concentration.
Step 2.  Check plasma osmolality.
NORMAL PLASMA
extra-renal volume loss ... • renal volume loss ... Workup #Algorithm #Nephrology
Causes of Hypernatremia - Differential Diagnosis
Inadequate water intake:
 • Lack of access to water
Extrarenal hypotonic fluid
hypotonic fluid loss ... Diagnosis #Causes #nephrology
Cerebral Salt Wasting vs SIADH - Pathophysiology 
1) Neurological event
2) Sodium loss from tubules
3) Naturiesis →
event 2) Sodium loss ... Pathophysiology #diagnosis #nephrology
Causes of Hypokalemia - Differential Diagnosis Algorithm
Once pseudohypokalemia is ruled out, causes of hypokalemia can be
(urinary or GI loss ... Causes #workup #nephrology
Causes of Hypokalemia - Differential Diagnosis Algorithm
Defining the cause of hypokalemia starts by measuring urinary K
gastrointestinal K loss ... • Renal K loss ... algorithm #causes #nephrology