Water deprivation test (serum/urine osmolality and sodium)

Test information

Water deprivation test is performed for investigation of ?diabetes insipidus. Endocrinology should be consulted prior to performing this test.

This test group should be requested on ICE for each timepoint serum and urine analysis is required. Tests included are urine osmo, serum osmo, serum sodium

Code

WDEP

Referral code

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Guidelines

Pre-analytical

Please let the laboratory know prior at least 24h prior to water deprivation test so Biochemistry laboratory staff can be alerted to need to perform osmo urgently

Reference range

Tube type

Tube type info

Spot urine in universal and SST (serum) sample

Special requirements

Tests included are urine osmo, serum osmo, serum sodium

Minimum volume

Assay frequency

TAT Inpatient (urgent)

1.5 h

TAT Inpatient

4 h

TAT GP/Outpatient

Not available

Referral lab