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Test & Collection Guide

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Sodium and Potassium - Urine

Alternate names:
Potassium - Urine, Sodium - Urine
Laboratory:
Biochemistry
Test Code:
NAU,24UNA,KU,24UK
Specimen types:
Urine
Container types:
UrineUrine
Collection Instructions:

Collection Instructions - 24 hour urine specimen

Notes:

These tests are of value principally -

In differentiation of the cause of low plasma sodium

To differentiate btween pre-renal and renal failure in certain circumstances where oligouria is present (urine Na)

In acute disturbances of sodium and potassium homeostasis, as a guide to immediate therapy

To assess volume status

Frequency:
Daily
Result Turnaround Time:
4 hours