29 results
Hypernatremia Diagnosis and Workup

Step 1 . Repeat the sodium concentration.
Step 2.  Check plasma osmolality.
NORMAL PLASMA
1 . ... Repeat the sodium ... Step 2. ... volume loss - diuretics ... #Algorithm #Nephrology
Flowchart to diuretic use in acute heart failure.

(A) Congestion with volume overload. 

(B) Treatment algorithm after
linked transporter 2 ... ultrafiltration; UO, urine ... #Diuretic #Diuresis ... #CHF #Algorithm ... #HeartFailure #Cardiology
Hypernatremia - Differential Diagnosis Workup Algorithm

1) Check Urine Osmolality:
 > 600 mOsm/kg - Implies extrarenal mechanism
Algorithm 1) ... • Hypovolemic: Diuretics ... osmotic (solute) diuresis ... #Algorithm #nephrology ... #sodium
Cerebral Salt Wasting vs SIADH - Pathophysiology 
1) Neurological event
2) Sodium loss from tubules
3) Naturiesis →
Pathophysiology 1) ... Neurological event 2) ... Sodium loss from ... ) Naturiesis → diuresis ... #hyponatremia #
Hyponatremia Treatment Algorithm

CHF, Cirrhosis - Fluid restriction
SIADH - Fluid restriction
 - Consider salt tablets if etiology
Algorithm CHF ... Fluid restriction SIADH ... consider adding loop diuretic ... -> free water diuresis ... ) 1° polydipsia
Physiologic Approach to Hypotonic Hyponatremia
The next time you have a case of hypotonic hyponatremia, give the
Urine Na+K / serum ... (diuretics, mineralocorticoid ... deficiency, Post-AKI diuresis ... (AKI, Post-AKI diuresis ... #nephrology
Hyponatremia Differential Diagnosis Algorithm - Utilizing Uric Acid 
ADH promotes Urea/uric acid excretion along with water
water retention 1) ... Serum Osmolarity 2) ... 3) Urine Sodium ... Low Uric Acid → SIADH ... #nephrology #sodium
Modified Hyponatremia Algorithm
Hypertonic Hyponatremia: Hyperglycemia, Mannitol, Urologic irrigants
Hypotonic Hyponatremia: 
 • ADH ON (UOsm > 100):
Algorithm Hypertonic ... OFF (UNa > 30): SIADH ... , Medications (diuretics ... #Algorithm #diagnosis ... #sodium #nephrology
Hyponatremia - Diagnostic Evaluation Algorithm

Step 1: Consider whether Posm may actually be normal or elevated
Step 2:
Step 1: Consider ... elevated Step 2: ... Check Uosm and/or Urine ... tests Step 5: If SIADH ... #Diagnosis #Workup
Causes of Hypernatremia - Differential Diagnosis Algorithm
Hypernatremia - Excess free water loss, Serum Sodium >145 mmol/L
High
water loss, Serum Sodium ... 145 mmol/L High Urine ... administration • Osmotic diuresis ... glucosuria Low Urine ... #Nephrology #Differential