Osmolality (Urine)

Testing Laboratory

Waitematā | Northshore Hospital

Department

Chemical Pathology

Delphic Registration Code (Alpha Code)

UOS

Test Code (Numeric Code)

0222

Laboratory Handling

Sample Stability

24 hours

Synonyms

Specific Gravity

Turnaround Time

4 hours

Specimen Type

• Urine

Specimen Requirements

Tube/Container Type:

Preferred

• BD Urine Tube (no additive)

Acceptable

• Specimen Container

Preferred Sample Volume (ml)

3

Minimum Sample Volume (ml)

1

Paediatric Specimen Requirements

Tube/Container Type:

Preferred

• BD Urine Tube (no additive)

Acceptable

• Specimen Container

Minimum Sample Volume (ml)

1

Aliquot Instructions

Minimum Volume (ml)

1

Transport to Lab

Chilled (2 - 8 degrees Celsius)

Test Method

Principle: Freezing Point Depression
Analyser: John Morris Osmo1

To assess the concentrating ability of the kidneys in renal disease, polyuria, polydipsia, diabetes insipidus, and the syndrome of inappropriate ADH secretion.
It should be measured in conjunction with the serum osmolality .
Water deprivation or water loading tests may be required.

Contact Information