13 results
Physiologic Approach to Hypotonic Hyponatremia
The next time you have a case of hypotonic hyponatremia, give the
: SIADH, Renal Sodium ... can be high or low ... Primary polydipsia), Low ... #Hyponatremia #differential ... #nephrology
Modified Hyponatremia Algorithm
Hypertonic Hyponatremia: Hyperglycemia, Mannitol, Urologic irrigants
Hypotonic Hyponatremia: 
 • ADH ON (UOsm > 100):
Hyponatremia: • ADH ... ON (UOsm > 100) ... Primary polydipsia, Low ... Algorithm #diagnosis #sodium ... #nephrology
Polyuria - Differential Diagnosis Algorithm
Polyuria = >3L Urine output / 24 hours
Urine osmolality = 2 (Na
Polyuria - Differential ... osmolality > 300 mosm ... nutrition), Azotemia LOW ... #Differential # ... Diagnosis #Algorithm #nephrology
Hyponatremia - Differential Diagnosis Algorithm
Hypovolemic - Give volume
Hypervolemic (Edematous) - Look for and treat underlying cause
Hyponatremia - Differential ... ) Euvolemic • UOsm ... Toast Diet • UOsm ... Algorithm #diagnosis #nephrology ... #sodium
Hyponatremia Differential Diagnosis Algorithm - Utilizing Uric Acid 
ADH promotes Urea/uric acid excretion along with water
Hyponatremia Differential ... Utilizing Uric Acid ADH ... Uric Acid - Low ... Diagnosis #Algorithm #nephrology ... #sodium #low #uricacid
Causes of Polyuria - Differential Diagnosis
Excess Intake of Water:
 • Primary polydipsia (a.k.a. "psychogenic polydipsia")
 •
- Differential ... • Central Dl (Low ... production Of ADH ... #Differential # ... Diagnosis #Causes #nephrology
Hyponatremia (<135 mEq/L) is a common electrolyte abnormality caused by an excess of total body water
osmolality helps to differentiate ... If Posm >285 mOsm ... stimulated in states of low ... urine osmolality (Uosm ... activated in states of low
Causes of Hypernatremia - Differential Diagnosis Algorithm
Hypernatremia - Excess free water loss, Serum Sodium >145 mmol/L
High
Hypernatremia - Differential ... water loss, Serum Sodium ... diuresis (see Polyuria ... mannitol, glucosuria Low ... Hypernatremia #Nephrology
Hypernatremia - Differential Diagnosis Workup Algorithm

1) Check Urine Osmolality:
 > 600 mOsm/kg - Implies extrarenal mechanism
Hypernatremia - Differential ... • Euvolemic (Low ... Hypernatremia #Differential ... Workup #Algorithm #nephrology ... #sodium
Workup for Hypophosphatemia - Differential Diagnosis Framework
Rule out spurious hypophosphatemia: paraproteinemia, acute leukemia
Measure Urine Fractional Excretion
Hypophosphatemia - Differential ... Glucose, Acute resp. alkalosis ... • Normal or Low ... carboxymaltose, ADHR ... Workup #phosphate #nephrology