What ancillary tests are helpful in the evaluation of hyponatremia?

Updated: Jun 17, 2019
  • Author: Eric E Simon, MD; Chief Editor: Vecihi Batuman, MD, FASN  more...
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Serum uric acid levels can be important supportive information (they are typically reduced in SIADH and also reduced in salt wasting). After correction of hyponatremia, the hypouricemia corrects in SIADH but remains with a salt-wasting process.

Thyroid-stimulating hormone (TSH) and serum cortisol levels should be measured if hypothyroidism or hypoadrenalism is suspected.

Serum albumin, triglycerides, and a serum protein electrophoresis also may be indicated for particular patients.

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