33 results
Hypernatremia Diagnosis and Workup

Step 1 . Repeat the sodium concentration.
Step 2.  Check plasma osmolality.
NORMAL PLASMA
Hypernatremia Diagnosis ... mmol/L - true hyponatremia ... • nephrotic syndrome ... renal failure #Hypernatremia ... #Algorithm #Nephrology
Causes of Hyponatremia - Differential Diagnosis Algorithm
Syndrome of Inappropriate ADH - Euvolemic; no physiologic stimulus to
Causes of Hyponatremia ... Malignancy True hypovolemia ... Hypo-osmolar urine ... osmole intake #Hyponatremia ... #Nephrology #Differential
Causes of Hyponatremia - Differential Diagnosis Algorithm
Syndrome of Inappropriate ADH - Euvolemic; no physiologic stimulus to
Causes of Hyponatremia ... Malignancy True hypovolemia ... Hypo-osmolar urine ... osmole intake #Hyponatremia ... #Nephrology #Differential
Hypernatremia - Differential Diagnosis Workup Algorithm

1) Check Urine Osmolality:
 > 600 mOsm/kg - Implies extrarenal mechanism
Hypernatremia - ... Extrarenal Hypernatremia ... Ingestion Renal Hypernatremia ... MatthewHoMD #Hypernatremia ... #Algorithm #nephrology
Causes of Hyponatremia - Differential Diagnosis Algorithm
Hypovolemia, UNa > 20: 
 • Renal losses, Diuretic excess,
Causes of Hyponatremia ... Hypovolemia, UNa ... Hypovolemia, UNa ... Cardiac failure #Hyponatremia ... #Causes #nephrology
Modified Hyponatremia Algorithm
Hypertonic Hyponatremia: Hyperglycemia, Mannitol, Urologic irrigants
Hypotonic Hyponatremia: 
 • ADH ON (UOsm > 100):
Modified Hyponatremia ... Hyponatremia: Hyperglycemia ... ON (UNa < 30): Hypovolemia ... Cirrhosis, Nephrotic syndrome ... #sodium #nephrology
Causes of Hypernatremia - Differential Diagnosis Algorithm
Hypernatremia - Excess free water loss, Serum Sodium >145 mmol/L
High
Causes of Hypernatremia ... Hypernatremia ... Hyperventilation #Hypernatremia ... #Nephrology #Differential ... #Causes
Hyponatremia Diagnosis Algorithm
UOsm ≥ POsm - Vasopressin-Dependent
 • UNa < 20 mEq/L - Appropriate (↓ EABV)
Hyponatremia Diagnosis ... Algorithm UOsm ... EABV) - Consider: Hypovolemia ... @NephroMD #hyponatremia ... #causes #nephrology
Hyponatremia - Diagnosis and Treatment
Hyponatremia is usually caused by the inability to excrete water normally.
Hyponatremia - Diagnosis ... Hyponatremia is ... 3 questions to work ... Measure urine osmolality ... of hyponatremia
Hyponatremia - Diagnostic Evaluation Algorithm

Step 1: Consider whether Posm may actually be normal or elevated
Step 2:
Hyponatremia - Diagnostic ... Check Uosm and/or Urine ... considered likely, the cause ... DrEricStrong #Hyponatremia ... #Diagnosis #Workup