Hyponatremia laboratory findings: Difference between revisions
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* Serum sodium | * Serum sodium | ||
* Serum osmolality | * Serum osmolality | ||
* Serum potassium | * [[Serum potassium]] | ||
* Serum chloride | * Serum chloride | ||
* Serum creatinine | * [[Serum creatinine]] | ||
* Serum other solutes | * Serum other solutes | ||
* Serum urea | * Serum [[urea]] | ||
* Blood Glucose | * Blood Glucose | ||
* Total protein and albumin | * Total protein and albumin | ||
* Serum lipids | * Serum [[lipids]] | ||
* Total bilirubin and direct bilirubin | * Total bilirubin and direct bilirubin | ||
* Red and white cell blood count | * Red and white cell blood count | ||
* Serum cortisol | * Serum [[Cortisol level|cortisol]] | ||
* Adrenocorticotropine hormone | * Adrenocorticotropine hormone | ||
* ADH level | * [[ADH|ADH level]] | ||
* TSH | * [[TSH]] | ||
* Urine sodium | * Urine sodium | ||
* Urine chloride | * Urine chloride | ||
* Urine osmolality | * [[Urine osmolality]] | ||
* Urine for other solutes | * Urine for other solutes | ||
* Fraction excretion of sodium | * Fraction excretion of sodium | ||
* Calculated GFR | * Calculated [[GFR]] | ||
}} | }} | ||
For different causes of hyponatremia, click [[Hyponatremia causes#Causes|here]]. | For different causes of hyponatremia, click [[Hyponatremia causes#Causes|here]]. | ||
Revision as of 14:23, 4 June 2018
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Saeedeh Kowsarnia M.D.[2]
Overview
Laboratory Findings
Biochemical evaluation for finding the etiologies of hyponatremia :
The unnamed parameter 2= is no longer supported. Please see the documentation for {{columns-list}}.
2For different causes of hyponatremia, click here.
For approach to differential diagnosis, click here.
For the clinical approach to diagnosis, click here.
Laboratory findings in different causes of hyponatremia [1]:
| Conditions | Sodium status | Plasma osmolality | Urine osmolality | Differentiation of causes |
|---|---|---|---|---|
| Hypervolemic hyponatremia | TBW ↑↑
Serum Na ↑ |
< 275 mOsm/kg | > 100 mOsm/kg | UNa > 20 mEq/L:
UNa < 20 mEq/L:
|
| Euvolemic hyponatremia | TBW ↑
Serum Na ↔ |
< 275 mOsm/kg | > 100 mOsm/kg | Variable UNa :
UNa > 40 mEq/L:
|
| Hypovolemic hyponatremia | TBW ↔
Serum Na ↓↓ |
< 275 mOsm/kg | > 500 mOsm/kg | UNa > 30 mEq/L:
UNa < 30 mEq/L:
|
References
- ↑ Wiebke Fenske, Sebastian K. G. Maier, Anne Blechschmidt, Bruno Allolio & Stefan Stork (2010). "Utility and limitations of the traditional diagnostic approach to hyponatremia: a diagnostic study". The American journal of medicine. 123 (7): 652–657. doi:10.1016/j.amjmed.2010.01.013. PMID 20609688. Unknown parameter
|month=ignored (help)