Hyponatremia laboratory findings: Difference between revisions
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* Calculated GFR | * Calculated GFR | ||
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For | For different causes of hyponatremia, click here. | ||
For the clinical approach to diagnosis click [[Hyponatremia diagnostic study of choice#Diagnostic Approach to Hyponatremia|here]]. | For approach to differential diagnosis, click [[Hyponatremia differential diagnosis#Differentiating etiologies of Hyponatremia|here]]. | ||
For the clinical approach to diagnosis, click [[Hyponatremia diagnostic study of choice#Diagnostic Approach to Hyponatremia|here]]. | |||
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|'''U<sub>Na</sub> > 30 mEq/L:''' | |'''U<sub>Na</sub> > 30 mEq/L:''' | ||
* Renal loss: | * Renal loss: | ||
** [[Osmotic diuresis]] ([[glucose]], [[urea]], bicarbonaturia) | ** [[Osmotic diuresis]] ([[glucose]], [[urea]], bicarbonaturia) | ||
** Salt-Iosing nephropathy | ** Salt-Iosing nephropathy | ||
** [[Addison disease]] | ** [[Addison disease]] | ||
** [[Cerebral salt wasting syndrome|CSW]] | ** [[Cerebral salt wasting syndrome|CSW]] | ||
** Diuretics | |||
'''U<sub>Na</sub> < 30 mEq/L:''' | '''U<sub>Na</sub> < 30 mEq/L:''' | ||
* Diuretics | * Diuretics | ||
* | * Extra renal loss: | ||
* | ** [[Vomiting]] (U<sub>cl</sub> ↓) | ||
** [[Diarrhea]] | |||
* | ** [[Pancreatitis]] | ||
** [[Sweating]] | |||
* | ** Small bowel obstruction | ||
* | |||
* | |||
|} | |} | ||
*There are no diagnostic laboratory findings associated with [disease name]. | *There are no diagnostic laboratory findings associated with [disease name]. | ||
Revision as of 08:35, 29 May 2018
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Hyponatremia Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Hyponatremia laboratory findings On the Web |
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American Roentgen Ray Society Images of Hyponatremia laboratory findings |
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Risk calculators and risk factors for Hyponatremia laboratory findings |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Saeedeh Kowsarnia M.D.[2]
Overview
An elevated/reduced concentration of serum/blood/urinary/CSF/other [lab test] is diagnostic of [disease name].
OR
Laboratory findings consistent with the diagnosis of [disease name] include [abnormal test 1], [abnormal test 2], and [abnormal test 3].
OR
[Test] is usually normal among patients with [disease name].
OR
Some patients with [disease name] may have elevated/reduced concentration of [test], which is usually suggestive of [progression/complication].
OR
There are no diagnostic laboratory findings associated with [disease name].
Laboratory Findings
Biochemical evaluation for finding the etiologies of hyponatremia :
For different causes of hyponatremia, click here.
For approach to differential diagnosis, click here.
For the clinical approach to diagnosis, click here.
| 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 urinary sodium:
UNa < 20 mEq/L urinary sodium:
|
| Euvolemic hyponatremia | TBW ↑
Serum Na ↔ |
< 275 mOsm/kg | > 100 mOsm/kg | Variable UNa:
UNa > 40 mEq/L:
|
| Hypovolemic hyponatremia | TBW ↔
Serum Na ↓↓ |
≥ 280 mOsm/kg | > 500 mOsm/kg | UNa > 30 mEq/L:
UNa < 30 mEq/L:
|
- There are no diagnostic laboratory findings associated with [disease name].
OR
- An elevated/reduced concentration of serum/blood/urinary/CSF/other [lab test] is diagnostic of [disease name].
- [Test] is usually normal among patients with [disease name].
- Laboratory findings consistent with the diagnosis of [disease name] include:
- [Abnormal test 1]
- [Abnormal test 2]
- [Abnormal test 3]
- Some patients with [disease name] may have elevated/reduced concentration of [test], which is usually suggestive of [progression/complication].