3048 results
Hyponatremia Diagnosis Algorithm
UOsm ≥ POsm - Vasopressin-Dependent
 • UNa < 20 mEq/L - Appropriate (↓ EABV)
Hyponatremia Diagnosis Algorithm ... Consider: Primary polydipsia ... #differential #algorithm ... #causes #nephrology
Polyuria - Differential Diagnosis Algorithm
Polyuria = >3L Urine output / 24 hours
Urine osmolality = 2 (Na
Differential Diagnosis Algorithm ... Insipidus • Primary Polydipsia ... Differential #Diagnosis #Algorithm ... #nephrology
Polyuria - Differential Diagnosis Algorithm
Urine Output > 3L /day
Water Diuresis (Urine Osm <100 mOsm/kg)
 • Primary
Differential Diagnosis Algorithm ... kg) • Primary Polydipsia ... Differential #Diagnosis #Algorithm ... #causes #nephrology
Hyponatremia - Differential Diagnosis Algorithm
ADH Independent:
 • Tea and Toast Syndrome, Beer Potomania - Low solute
Differential Diagnosis Algorithm ... • Psychogenic Polydipsia ... Differential #Diagnosis #Algorithm ... #causes #nephrology
Modified Hyponatremia Algorithm
Hypertonic Hyponatremia: Hyperglycemia, Mannitol, Urologic irrigants
Hypotonic Hyponatremia: 
 • ADH ON (UOsm > 100):
Modified Hyponatremia Algorithm ... 100): Primary polydipsia ... #Hyponatremia #Algorithm ... diagnosis #sodium #nephrology
Causes of Hyponatremia - Differential Diagnosis Algorithm
Syndrome of Inappropriate ADH - Euvolemic; no physiologic stimulus to
Differential Diagnosis Algorithm ... suppression • Primary polydipsia ... #Hyponatremia #Nephrology ... Differential #Diagnosis #Algorithm
Causes of Hyponatremia - Differential Diagnosis Algorithm
Syndrome of Inappropriate ADH - Euvolemic; no physiologic stimulus to
Differential Diagnosis Algorithm ... suppression • Primary polydipsia ... #Hyponatremia #Nephrology ... Differential #Diagnosis #Algorithm
Hyponatremia - Differential Diagnosis Algorithm
Hypovolemic - Give volume
Hypervolemic (Edematous) - Look for and treat underlying cause
Differential Diagnosis Algorithm ... - Primary Polydipsia ... Differential #Diagnosis #Algorithm ... #diagnosis #nephrology
Volume Based Approach to Hyponatremia
Hypovolemic, Serum uric acid >4
 • Urine Na <20: Extra-renal losses
 •
deficiency, Primary polydipsia ... #Hyponatremia #algorithm ... #sodium #low #nephrology
Hypernatremia Diagnosis and Workup

Step 1 . Repeat the sodium concentration.
Step 2.  Check plasma osmolality.
NORMAL PLASMA
• psychogenic polydipsia ... Diagnosis #Workup #Algorithm ... #Nephrology