Osmolality, urine
Clinical Background:
Assessing the concentrating and diluting ability of the kidney
Assessing the concentrating and diluting ability of the kidney
Test Details
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Discipline:
Biochemistry
Biochemistry
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Specimen Container Adult:
Plain universal container
Plain universal container
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Specimen Container Paediatric:
Plain universal container
Plain universal container
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Minimum Volume Adult:
1 mL urine
1 mL urine
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Minimum Volume Paediatric:
1 mL urine
1 mL urine
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Sample Stability:
3 days at 20-25C
7 days at 4-8C
>3 months at -20C
3 days at 20-25C
7 days at 4-8C
>3 months at -20C
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Interpretation:
Usually interpretation of urine osmolality requires knowledge of the fluid status of the patient and serum osmolality and urine sodium. Some of the causes of changes in osmolality include: diabetes...
Read MoreUsually interpretation of urine osmolality requires knowledge of the fluid status of the patient and serum osmolality and urine sodium. Some of the causes of changes in osmolality include: diabetes insipidus, SIADH, primary polydipsia, osmotic diuresis, acute renal injury, hypoadrenalism.
For further information on interpreting osmolality please contact the duty biochemist. -
Reference Ranges:
Random: 50-1200 mmol/Kg
(Depending on fluid intake and hydration state)Random: 50-1200 mmol/Kg
(Depending on fluid intake and hydration state) -
Other Info:
24 hour urine collection (plain bottle) also acceptable
24 hour urine collection (plain bottle) also acceptable
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Routine Contact Name:
Duty biochemist
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Routine Telephone:
Freeman: 0191 244 8889
RVI: 0191 282 9719Freeman: 0191 244 8889
RVI: 0191 282 9719 -
Routine Email: