A member asked:

Have lupus & pots. having low blood pressures, lightheaded, nightsweats, extreme nigttime polyuria. md ordered 24 hr urine sodium collection. why?

5 doctors weighed in across 2 answers
Dr. Eric Weisman answered

Specializes in Neurology

POTS and sodium: Excreting less than 124 mmol per 24 hours of sodium in the urine predicts if you will respond favorably to salt supplementation. One also is advised to increase fluid intake to prevent the BP from dropping and the heart rate from rising ( typically above 120 b/m ) upon standing. If sodium is excreted in larger amounts chances are other therapies will be needed ( B blockers, fludrocortisone etc )

Answered 5/3/2016

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Dr. Vythilingam Alagappan answered

Specializes in Bariatrics

To differentiate : In prerenal failure like from dehydration sodium will be too low in the urine.In true renal failure like that can happen in Lupus you will not be able to conserve the sodium and will leak . So by this test doctors can learn a lot

Answered 4/4/2016

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