4 results
Hypernatremia Diagnosis and Workup

Step 1 . Repeat the sodium concentration.
Step 2.  Check plasma osmolality.
NORMAL PLASMA
and Workup Step ... Repeat the sodium ... EUVOLEMIC • SIADH ... HYPERVOLEMIC • CHF ... #Algorithm #Nephrology
A lazy man's classification of hyponatremia
There are two possible approaches to the diagnosis of hyponatremia: .
of hyponatremia ... serum osmolality, urine ... osmolality and urinary sodium ... the patient has SIADH ... #Algorithm #Differential
Hyponatremia - Diagnosis and Treatment
Hyponatremia is usually caused by the inability to excrete water normally.
3 questions to work ... Measure urine osmolality ... Treatment: Treatment ... include vaptans (HF ... management #nephrology #sodium
Primary Polydipsia
Definition: Excessive volitional water intake
Epidemiology:
 • 6-20% of patients with psychiatric disorders - Most commonly
hypothalamic thirst center ... Pseudohyponatremia, SIADH ... intoxication Initial Workup ... Osm, Serum Sodium ... , Urine Sodium