The principle of the water deprivation test is to assess the ability of the patient to concentrate urine when fluids are withheld. Water deprivation should normally cause increased secretion of ADH, resulting in the production of small volumes of concentrated urine.
Tube
Plain Universal (Urine) / Serum Gel (Serum)
ID
39331
Availability
Requester must contact the Duty Biochemist Ext 26922 (option 2) to confirm date of the procedure. Failure to do this may result in a delay in the reporting of results.
Additional Information
Important
On the day of the water deprivation test, please contact the Duty Biochemist on ext 26922 (option 2). This will allow us to ensure sufficient staff resources are available for prompt analysis of osmolality. A urine osmolality >750 mOsmol/kg excludes diabetes insipidus (DI) as a cause of polyuria (in classic DI, serum osmolality rises above 300 mOsmol/kg and urine osmolality remains <350 mOsmol/kg). However, a low urine osmolality is NOT diagnostic of DI.
Send To
Blood Sciences at LGI or SJUH.
Contact
For further details please contact Ä¢¹½tvÊÓƵ Pathology customer services: [email protected].
Sample Req
Urine / Serum
Contact
For further details please contact Ä¢¹½tvÊÓƵ Pathology customer services: [email protected].