30 results
Modified Hyponatremia Algorithm
Hypertonic Hyponatremia: Hyperglycemia, Mannitol, Urologic irrigants
Hypotonic Hyponatremia: 
 • ADH ON (UOsm > 100):
Algorithm Hypertonic ... (UOsm < 100): Primary ... polydipsia, Low ... #Algorithm #diagnosis ... #sodium #nephrology
Causes of Polyuria - Differential Diagnosis Algorithm
Polyuria - Urine Output > 3L/day, Increased Urine Volume (>2ml/min)
Osmotic
- Differential ... Diagnosis Algorithm ... Deprivation Test • Primary ... #Nephrology #Differential ... #Diagnosis #Algorithm
Hypo-osmolar Hypotonic HypoNatremia Algorithm (Serum Na+ < 135 meq/L, serum Osm < 275 mosm/kg)
Assess Volume Status,
Hypo-osmolar Hypotonic ... HypoNatremia Algorithm ... #Algorithm #Diagnosis ... #Nephrology #Differential ... #Hypotonic
Causes of Hypernatremia - Differential Diagnosis Algorithm
Hypernatremia - Excess free water loss, Serum Sodium >145 mmol/L
High
Diagnosis Algorithm ... 300 mmol/kg • Hypertonic ... diuresis (see Polyuria ... #Nephrology #Differential ... #Diagnosis #Algorithm
Polyuria - Differential Diagnosis Algorithm
Polyuria = >3L Urine output / 24 hours
Urine osmolality = 2 (Na
Polyuria - Differential ... Diagnosis Algorithm ... nutrition), Azotemia LOW ... Diabetes Insipidus • Primary ... Diagnosis #Algorithm
Physiologic Approach to Hypotonic Hyponatremia
The next time you have a case of hypotonic hyponatremia, give the
normal volume-based algorithm ... can be high or low ... water intake (Primary ... polydipsia), Low ... differential #diagnosis
Polyuria - Differential Diagnosis Algorithm
Urine Output > 3L /day
Water Diuresis (Urine Osm <100 mOsm/kg)
 • Primary
Polyuria - Differential ... Diagnosis Algorithm ... #Differential # ... Diagnosis #Algorithm ... #causes #nephrology
Hyponatremia - Differential Algorithm
Isotonic Hyponatremia: Hyperlipidemia, Hyperproteinemia, Recent TURP
Hypotonic Hyponatremia: 
 • Hypovolemia: Diuretics/Nephropathies, Vomiting, Diarrhea,
Hyponatremia - Differential ... Algorithm Isotonic ... Algorithm #diagnosis ... #causes #nephrology ... #sodium #low
Hyponatremia Diagnosis Algorithm
UOsm ≥ POsm - Vasopressin-Dependent
 • UNa < 20 mEq/L - Appropriate (↓ EABV)
Hyponatremia Diagnosis ... Vasopressin-independent - Consider: Primary ... polydipsia, Low ... #diagnosis #differential ... #nephrology
True Hyponatremia Differential Algorithm

Instead (or in addition) of volume status examination, check urine sodium and serum
Differential Algorithm ... - Urine sodium low ... #Differential # ... Algorithm #Diagnosis ... #Nephrology