15 results
Physiologic Approach to Hypotonic Hyponatremia
The next time you have a case of hypotonic hyponatremia, give the
Physiologic Approach ... time you have a case ... the physiologic approach ... algorithm Urine ... can be high or low
Volume Based Approach to Hyponatremia
Hypovolemic, Serum uric acid >4
 • Urine Na <20: Extra-renal losses
 •
Volume Based Approach ... to Hyponatremia ... Hypovolemic, Serum ... algorithm #diagnosis ... #sodium #low #nephrology
True Hyponatremia Differential Algorithm

Instead (or in addition) of volume status examination, check urine sodium and serum
Differential Algorithm ... in addition) of volume ... low, uric acid ... high in hypovolemic ... and uric acid low
Hypernatremia Diagnosis and Workup

Step 1 . Repeat the sodium concentration.
Step 2.  Check plasma osmolality.
NORMAL PLASMA
Hypernatremia Diagnosis ... Repeat the sodium ... HYPOVOLEMIC • ... extra-renal volume ... Diagnosis #Workup #Algorithm
Modified Hyponatremia Algorithm
Hypertonic Hyponatremia: Hyperglycemia, Mannitol, Urologic irrigants
Hypotonic Hyponatremia: 
 • ADH ON (UOsm > 100):
ON (UNa < 30): Hypovolemia ... Hypothyroidism, Adrenal ... Primary polydipsia, Low ... solute intake, ... #sodium #nephrology
Hypernatremia - Differential Diagnosis Workup Algorithm

1) Check Urine Osmolality:
 > 600 mOsm/kg - Implies extrarenal mechanism
Diagnosis Workup Algorithm ... mechanism 2) Volume ... : • Hypovolemic ... • Euvolemic (Low ... #nephrology #sodium
Hyponatremia - Differential Diagnosis Algorithm
ADH Independent:
 • Tea and Toast Syndrome, Beer Potomania - Low solute
Hyponatremia - Differential ... Diagnosis Algorithm ... Beer Potomania - Low ... Dependent: • Hypovolemic ... #causes #nephrology
Hyponatremia Diagnosis Algorithm
UOsm ≥ POsm - Vasopressin-Dependent
 • UNa < 20 mEq/L - Appropriate (↓ EABV)
EABV) - Consider: Hypovolemia ... Primary polydipsia, Low ... solute intake, ... Renal insufficiency ... #causes #nephrology
Hyponatremia - Differential Diagnosis Algorithm
Hypovolemic - Give volume
Hypervolemic (Edematous) - Look for and treat underlying cause
Diagnosis Algorithm ... Hypovolemic - Give ... volume Hypervolemic ... treat underlying cause ... diagnosis #nephrology #sodium
Hyponatremia (<135 mEq/L) is a common electrolyte abnormality caused by an excess of total body water
electrolyte abnormality caused ... hypervolemic, hypovolemic ... stimulated in states of low ... activated in states of low ... #RAAS #Hypovolemia