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Water Deprivation Test

Source Blood and Urine
Mnemonic

WDBASE - baseline sample

WDU - subsequent urine sample

WDB - subsequent blood sample

Specimen Requirements

Test cannot be collected by Patient Service Centres (PSC), Mobile Collection Services (MCS) or Urgent Care Centres.

Only available at: ACH and FMC.

Absolute specimen requirements to begin this test are (1) baseline urine, and (2) baseline blood.
Draw baseline blood only after baseline urine is collected.

Exceptions to this process to be made by clinical biochemist approval only.

Baseline:
1 x 5 mL light green (mint) top PST tube.  Gold top SST tube is also acceptable.
1.0 mL plasma or serum
AND
10 mL random urine

Subsequent orders may include a urine sample, a blood sample or both:
10 mL random urine
1 x 5 mL light green (mint) top PST tube. Gold top SST tube is also acceptable.
1.0 mL plasma or serum

Specimen Handling Endocrine and Metabolic Treatment and Testing Clinic is to indicate urine volume and sample ID (e.g. Baseline, 1hr, 2 hr, etc) on the requisition or transmittal.
Additional Information The Clinic is to notify Chemistry (FMC 403-944-8040; ACH 403-943-7383) the day before the procedure is performed and also when the procedure is finished.
Testing Location
Testing Frequency Weekdays
Alternate Name(s)
Reference Interval