12 results
Physiologic Approach to Hypotonic Hyponatremia
The next time you have a case of hypotonic hyponatremia, give the
≥100): SIADH, Renal ... Sodium loss (diuretics ... Present (Uosm <100): Renal ... Hypervolemia with poor renal ... #nephrology
Hypernatremia - Differential Diagnosis Workup Algorithm

1) Check Urine Osmolality:
 > 600 mOsm/kg - Implies extrarenal mechanism
Diagnosis Workup Algorithm ... mOsm/kg - Implies renal ... • Euvolemic (Low ... , Ingestion Renal ... #nephrology #sodium
Causes of Hyponatremia - Differential Diagnosis Algorithm
Hypovolemia, UNa > 20: 
 • Renal losses, Diuretic excess,
UNa > 20: • Renal ... Bicarbonaturia with renal ... UNa > 20: • Acute ... or chronic renal ... #Causes #nephrology
Hypernatremia Diagnosis and Workup

Step 1 . Repeat the sodium concentration.
Step 2.  Check plasma osmolality.
NORMAL PLASMA
Repeat the sodium ... HYPOVOLEMIC • extra-renal ... - fevers • renal ... • renal failure ... #Nephrology
Acute Kidney Injury - AKI Workup Algorithm and Differential Diagnosis
Baseline Investigations: full blood count with differential,
- AKI Workup Algorithm ... urinary sediment, renal ... renal biopsy • ... , renal biopsy ... Differential #Diagnosis #nephrology
Causes of Hyponatremia - Differential Diagnosis Algorithm
Syndrome of Inappropriate ADH - Euvolemic; no physiologic stimulus to
Causes of Hyponatremia ... GI losses • Renal ... especially thiazide diuretics ... • Reduced GFR, AKI ... #Nephrology #Differential
Causes of Hyponatremia - Differential Diagnosis Algorithm
Syndrome of Inappropriate ADH - Euvolemic; no physiologic stimulus to
Causes of Hyponatremia ... GI losses • Renal ... especially thiazide diuretics ... • Reduced GFR, AKI ... #Nephrology #Differential
Volume Based Approach to Hyponatremia
Hypovolemic, Serum uric acid >4
 • Urine Na <20: Extra-renal losses
 •
Na <20: Extra-renal ... Urine Na >30: Renal ... Urine Na > 30: Renal ... #algorithm #diagnosis ... #sodium #low #nephrology
Diuretics and Agents Regulating Renal Excretion

Carbonic Anhydrase Inhibitors (Acetazolamide, Dichlorphenamide)
 • Glaucoma
 • Epilepsy
 • Altitude
Regulating Renal ... Inhibitors of Renal ... Renal #Excretion ... #Diuresis #Nephrology ... #Pharmacology #
Hyponatremia - Differential Algorithm
Isotonic Hyponatremia: Hyperlipidemia, Hyperproteinemia, Recent TURP
Hypotonic Hyponatremia: 
 • Hypovolemia: Diuretics/Nephropathies, Vomiting, Diarrhea,
• Hypovolemia: Diuretics ... Cirrhosis, Nephrotic Syndrome ... , Chronic Renal ... diagnosis #causes #nephrology ... #sodium #low