9 results
Hypernatremia - Differential Diagnosis Workup Algorithm

1) Check Urine Osmolality:
 > 600 mOsm/kg - Implies extrarenal mechanism
Diagnosis Workup Algorithm ... : • Hypovolemic ... access to H2O • Hypervolemic ... • Hypovolemic: ... nephrogenic) • Hypervolemic
Differential Diagnosis and Evaluation of Hyponatremia:
1) Identification of onset (acute vs. chronic)
2) Presence of symptoms (HA,
cardiac, liver, renal ... Diagnosis #EM #IM #Nephro ... Hypovolemic #Euvolemic ... #Hypervolemic # ... #Differential #Algorithm
Hypernatremia Diagnosis and Workup

Step 1 . Repeat the sodium concentration.
Step 2.  Check plasma osmolality.
NORMAL PLASMA
Hypernatremia Diagnosis ... HYPOVOLEMIC • ... extra-renal volume ... psychogenic polydipsia HYPERVOLEMIC ... Diagnosis #Workup #Algorithm
Hyponatremia - Differential Diagnosis Algorithm
ADH Independent:
 • Tea and Toast Syndrome, Beer Potomania - Low solute
Hyponatremia - Differential ... Diagnosis Algorithm ... • Renal Failure ... Dependent: • Hypovolemic ... • Hypervolemic
Volume Based Approach to Hyponatremia
Hypovolemic, Serum uric acid >4
 • Urine Na <20: Extra-renal losses
 •
Based Approach to Hyponatremia ... Hypovolemic, Serum ... Primary polydipsia Hypervolemic ... SatyaPatelMD #Volume #Hyponatremia ... #algorithm #diagnosis
Causes of Hyponatremia - Differential Diagnosis Algorithm
Hypovolemia, UNa > 20: 
 • Renal losses, Diuretic excess,
Causes of Hyponatremia ... Differential Diagnosis Algorithm ... Hypovolemia, UNa ... wasting syndrome Hypovolemia ... failure Hypervolemia
Hyponatremia Diagnosis Algorithm
UOsm ≥ POsm - Vasopressin-Dependent
 • UNa < 20 mEq/L - Appropriate (↓ EABV)
Hyponatremia Diagnosis ... Algorithm UOsm ... EABV) - Consider: Hypovolemia ... solute intake, Renal ... Helbert Rondon, MD @NephroMD
Physiologic Approach to Hypotonic Hyponatremia
The next time you have a case of hypotonic hyponatremia, give the
Approach to Hypotonic Hyponatremia ... normal volume-based algorithm ... ≥100): SIADH, Renal ... Present (Uosm ≥100): Hypovolemia ... , Hypervolemia with
Hyponatremia - Differential Algorithm
Isotonic Hyponatremia: Hyperlipidemia, Hyperproteinemia, Recent TURP
Hypotonic Hyponatremia: 
 • Hypovolemia: Diuretics/Nephropathies, Vomiting, Diarrhea,
Algorithm Isotonic ... : • Hypovolemia ... polydipsia • Hypervolemia ... Syndrome, Chronic Renal ... #Differential #Algorithm