15 results
Causes of Hyponatremia - Differential Diagnosis Algorithm
Hypovolemia, UNa > 20: 
 • Renal losses, Diuretic excess,
Cerebral salt wasting syndrome ... Stress, Drugs, Syndrome ... , UNa < 20 • Nephrotic ... syndrome, Cirrhosis ... #nephrology
Modified Hyponatremia Algorithm
Hypertonic Hyponatremia: Hyperglycemia, Mannitol, Urologic irrigants
Hypotonic Hyponatremia: 
 • ADH ON (UOsm > 100):
syndrome - ... , Medications (diuretics ... Primary polydipsia, Low ... #Algorithm #diagnosis ... #sodium #nephrology
Causes of Hyponatremia - Differential Diagnosis Algorithm
Syndrome of Inappropriate ADH - Euvolemic; no physiologic stimulus to
Algorithm Syndrome ... Cirrhosis • Nephrotic ... syndrome • Reduced ... #Nephrology #Differential ... #Diagnosis #Algorithm
Causes of Hyponatremia - Differential Diagnosis Algorithm
Syndrome of Inappropriate ADH - Euvolemic; no physiologic stimulus to
Algorithm Syndrome ... Cirrhosis • Nephrotic ... syndrome • Reduced ... #Nephrology #Differential ... #Diagnosis #Algorithm
Hyponatremia - Differential Diagnosis Algorithm
ADH Independent:
 • Tea and Toast Syndrome, Beer Potomania - Low solute
Diagnosis Algorithm ... Tea and Toast Syndrome ... Beer Potomania - Low ... syndrome ... #nephrology
Hypernatremia - Differential Diagnosis Workup Algorithm

1) Check Urine Osmolality:
 > 600 mOsm/kg - Implies extrarenal mechanism
Workup Algorithm ... • Euvolemic (Low ... Hypervolemic: Conn syndrome ... , Cushing syndrome ... #nephrology #sodium
Hypernatremia Diagnosis and Workup

Step 1 . Repeat the sodium concentration.
Step 2.  Check plasma osmolality.
NORMAL PLASMA
Hypernatremia Diagnosis ... volume loss - diuretics ... liver failure • nephrotic ... syndrome • renal ... #Algorithm #Nephrology
Volume Based Approach to Hyponatremia
Hypovolemic, Serum uric acid >4
 • Urine Na <20: Extra-renal losses
 •
Hypothyroidism, Low ... failure, Cirrhosis, Nephrotic ... syndrome • Urine ... #algorithm #diagnosis ... #sodium #low #nephrology
Physiologic Approach to Hypotonic Hyponatremia
The next time you have a case of hypotonic hyponatremia, give the
normal volume-based algorithm ... failure, Cirrhosis, Nephrotic ... syndrome) • ADH ... #differential #diagnosis ... table #sodium #nephrology
Diuretics and Agents Regulating Renal Excretion

Carbonic Anhydrase Inhibitors (Acetazolamide, Dichlorphenamide)
 • Glaucoma
 • Epilepsy
 • Altitude
disequilibrium syndrome ... syndromeHyponatremia ... syndrome • Nephrogenic ... disease • Liddle syndrome ... #Nephrology #Pharmacology