6 results
True Hyponatremia Differential Algorithm

Instead (or in addition) of volume status examination, check urine sodium and serum
True Hyponatremia ... Differential Algorithm ... - Urine sodium ... @kidney_boy #True ... #Diagnosis #Nephrology
Hypernatremia Diagnosis and Workup

Step 1 . Repeat the sodium concentration.
Step 2.  Check plasma osmolality.
NORMAL PLASMA
Repeat the sodium ... < 285 mmol/L - true ... • psychogenic polydipsia ... HYPERVOLEMIC • CHF ... #Nephrology
Causes of Hyponatremia - Differential Diagnosis Algorithm
Syndrome of Inappropriate ADH - Euvolemic; no physiologic stimulus to
• Malignancy True ... Reduced GFR, AKI/CRF ... Hypo-osmolar urine ... suppression • Primary polydipsia ... #Nephrology #Differential
Causes of Hyponatremia - Differential Diagnosis Algorithm
Syndrome of Inappropriate ADH - Euvolemic; no physiologic stimulus to
• Malignancy True ... Reduced GFR, AKI/CRF ... Hypo-osmolar urine ... suppression • Primary polydipsia ... #Nephrology #Differential
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 ... restriction alone in ... intake (Primary polydipsia ... #nephrology
Primary Polydipsia
Definition: Excessive volitional water intake
Epidemiology:
 • 6-20% of patients with psychiatric disorders - Most commonly
occurs in only ... tobacco users; in ... Osm, Serum Sodium ... , Urine Sodium ... diagnosis #management #nephrology