124 results
True Hyponatremia Differential Algorithm

Instead (or in addition) of volume status examination, check urine sodium and serum
uric acid: - Urine ... sodium low, uric ... - Urine sodium ... and uric acid low ... Algorithm #Diagnosis #Nephrology
Causes of Hyponatremia - Differential Diagnosis Algorithm
Syndrome of Inappropriate ADH - Euvolemic; no physiologic stimulus to
Causes of Hyponatremia ... Diagnosis Algorithm Syndrome ... Pain/Post-op • Neurologic ... • Nephrotic syndrome ... Hypo-osmolar urine
Volume Based Approach to Hyponatremia
Hypovolemic, Serum uric acid >4
 • Urine Na <20: Extra-renal losses
 •
Based Approach to Hyponatremia ... Hypothyroidism, Low ... Cirrhosis, Nephrotic syndrome ... diagnosis #sodium #low ... #nephrology
Causes of Hyponatremia - Differential Diagnosis Algorithm
Syndrome of Inappropriate ADH - Euvolemic; no physiologic stimulus to
Causes of Hyponatremia ... Diagnosis Algorithm Syndrome ... Pain/Post-op • Neurologic ... • Nephrotic syndrome ... Hypo-osmolar urine
Hyponatremia Differential Diagnosis Algorithm - Utilizing Uric Acid 
ADH promotes Urea/uric acid excretion along with water
Hyponatremia Differential ... Osmolarity 2) Urine ... Osmolarity 3) Urine ... Uric Acid - Low ... Diagnosis #Algorithm #nephrology
Causes of Hypernatremia - Differential Diagnosis Algorithm
Hypernatremia - Excess free water loss, Serum Sodium >145 mmol/L
High
Causes of Hypernatremia ... 145 mmol/L High Urine ... mannitol, glucosuria Low ... Urine Osmolality ... #Nephrology #Differential
Primary Metabolic Alkalosis - Differential Diagnosis Algorithm
Volume Depleted - 2° hyperaldosteronism
 • Low Urine Cl-: Vomiting,
Urine Cl-: Vomiting ... , NGT suction, Low ... (late) • High Urine ... Diagnosis #Algorithm #Nephrology ... #Causes
Hyponatremia - Differential Diagnosis Algorithm
ADH Independent:
 • Tea and Toast Syndrome, Beer Potomania - Low solute
Hyponatremia - Differential ... Tea and Toast Syndrome ... Beer Potomania - Low ... Diagnosis #Algorithm #causes ... #nephrology
Hypernatremia - Differential Diagnosis Workup Algorithm

1) Check Urine Osmolality:
 > 600 mOsm/kg - Implies extrarenal mechanism
Algorithm 1) Check Urine ... • Euvolemic (Low ... Hypervolemic: Conn syndrome ... , Cushing syndrome ... Workup #Algorithm #nephrology
Modified Hyponatremia Algorithm
Hypertonic Hyponatremia: Hyperglycemia, Mannitol, Urologic irrigants
Hypotonic Hyponatremia: 
 • ADH ON (UOsm > 100):
Modified Hyponatremia ... Algorithm Hypertonic Hyponatremia ... Cirrhosis, Nephrotic syndrome ... Primary polydipsia, Low ... diagnosis #sodium #nephrology