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Correction formulas for Hypernatremia and Hyponatremia
#Management #Nephro #Hyponatremia #Hypernatremia #Correction #FreeWaterDeficit #Formulas #Androgue #Calculation
Correction formulas for Hypernatremia ... and Hyponatremia ... Management #Nephro #Hyponatremia ... #Hypernatremia
Classification, Differential Diagnosis, and Features of Hyponatremia According to Volume Status 

Hypervolemic hypernatremia 
 - CHF
and Features of Hyponatremia ... Hypervolemic hypernatremia ... Normovolemic hyponatremia ... Renal hypovolemic hyponatremia ... Diarrhea #Hyponatremia
Modified Hyponatremia Algorithm
Hypertonic Hyponatremia: Hyperglycemia, Mannitol, Urologic irrigants
Hypotonic Hyponatremia: 
 • ADH ON (UOsm > 100):
Modified Hyponatremia ... Algorithm Hypertonic Hyponatremia ... irrigants Hypotonic Hyponatremia ... polydipsia, Low solute intake ... SatyaPatelMD #Hyponatremia
Diagnostic Approach to Hyponatremia
Box A:
 • Normo/hyperosmolar Hyponatremia: Glucose, Mannitol, Glycine, Contrast media, Maltose
 • Pseudohyponatremia:
Diagnostic Approach to Hyponatremia ... Normo/hyperosmolar Hyponatremia ... Polydipsia, Low Na intake ... Wilkinsonjonny #Hyponatremia
Hyponatremia Diagnosis Algorithm
UOsm ≥ POsm - Vasopressin-Dependent
 • UNa < 20 mEq/L - Appropriate (↓ EABV)
Hyponatremia Diagnosis ... polydipsia, Low solute intake ... @NephroMD #hyponatremia
Causes of Hypernatremia - Differential Diagnosis
Inadequate water intake:
 • Lack of access to water
Extrarenal hypotonic fluid
Causes of Hypernatremia ... Inadequate water intake ... Excessive salt intake ... administration #Hypernatremia
Causes of Hypernatremia - Differential Diagnosis Algorithm
Hypernatremia - Excess free water loss, Serum Sodium >145 mmol/L
High
Causes of Hypernatremia ... Diagnosis Algorithm Hypernatremia ... Hypodipsia - Decreased intake ... • Inadequate intake ... Hyperventilation #Hypernatremia
Physiologic Approach to Hypotonic Hyponatremia
The next time you have a case of hypotonic hyponatremia, give the
Approach to Hypotonic Hyponatremia ... case of hypotonic hyponatremia ... relative solute intake ... Excessive Free water intake ... Physiologic #Hypotonic #Hyponatremia
Hyponatremia Treatment Algorithm

CHF, Cirrhosis - Fluid restriction
SIADH - Fluid restriction
 - Consider salt tablets if etiology
Hyponatremia Treatment ... Normalize fluid intake ... DrEricStrong #Hyponatremia
Hypernatremia Diagnosis and Workup

Step 1 . Repeat the sodium concentration.
Step 2.  Check plasma osmolality.
NORMAL PLASMA
Hypernatremia Diagnosis ... mmol/L - true hyponatremia ... renal failure #Hypernatremia