13 results
Hyponatremia Differential Diagnosis Algorithm - Utilizing Uric Acid 
ADH promotes Urea/uric acid excretion along with water
Diagnosis Algorithm ... 2) Urine Osmolarity ... 3) Urine Sodium ... Uric Acid → SIADH ... #sodium #low #uricacid
Hyponatremia Diagnostic Algorithm
1) Check serum osmolality
2) Check urine osmolality
3) ADH Dependent - Check volume status, urine
Hyponatremia Diagnostic ... serum osmolality ... osmolality 3) ADH ... sodium, uric acid ... #Diagnosis #Algorithm
Hyponatremia (<135 mEq/L) is a common electrolyte abnormality caused by an excess of total body water
, urine sodium concentration ... and urine osmolality ... Measured urine sodium ... #hyponatremia #ADH ... EBV #potomania #SIADH
Modified Hyponatremia Algorithm
Hypertonic Hyponatremia: Hyperglycemia, Mannitol, Urologic irrigants
Hypotonic Hyponatremia: 
 • ADH ON (UOsm > 100):
Algorithm Hypertonic ... OFF (UNa > 30): SIADH ... Primary polydipsia, Low ... #Algorithm #diagnosis ... #sodium #nephrology
Physiologic Approach to Hypotonic Hyponatremia
The next time you have a case of hypotonic hyponatremia, give the
normal volume-based algorithm ... Urine Na+K / serum ... , Renal Sodium loss ... can be high or low ... #differential #diagnosis
Causes of Hypernatremia - Differential Diagnosis Algorithm
Hypernatremia - Excess free water loss, Serum Sodium >145 mmol/L
High
Algorithm Hypernatremia ... water loss, Serum Sodium ... Osmolality > 300 ... mannitol, glucosuria Low ... Urine Osmolality
Volume Based Approach to Hyponatremia
Hypovolemic, Serum uric acid >4
 • Urine Na <20: Extra-renal losses
 •
Based Approach to Hyponatremia ... uric acid <4 • SIADH ... Hypothyroidism, Low ... #algorithm #diagnosis ... #sodium #low #nephrology
A lazy man's classification of hyponatremia
There are two possible approaches to the diagnosis of hyponatremia: .
, urine osmolality ... and urinary sodium ... the patient has SIADH ... #Diagnosis #Hyponatremia ... #Algorithm #Differential
Hyponatremia - Diagnosis and Treatment
Hyponatremia is usually caused by the inability to excrete water normally.
Hyponatremia - Diagnosis ... majority of cases, ADH ... 2) Is ADH elevated ... Measure urine osmolality ... #nephrology #sodium
Hypernatremia - Differential Diagnosis Workup Algorithm

1) Check Urine Osmolality:
 > 600 mOsm/kg - Implies extrarenal mechanism
Workup Algorithm ... 1) Check Urine ... Osmolality: > ... • Euvolemic (Low ... #nephrology #sodium