Tubular Reabsorption of Phosphate

Department

Core Biochemistry

Delphic Registration Code

UTRP

Laboratory Handling

Registration

This test requires registration on TWO delphic numbers. The urine sample is registered for UTRP (this will request a UPO4 and UCRN). The plasma sample is registered under a different Delphic number for CRN and PO4.

Constituent Tests

• Creatinine, Plasma
• Creatinine, Urine
• Phosphate, Plasma
• Phosphate, Urine

Synonyms

% Phosphate Reabsorption
Phosphate Reabsorption
TRP

Turnaround Time

8 hours

Test Code

3065

Specimen Type

• Plasma
• Urine

Specimen Requirements

Tube/Container Type:

Preferred

• Pottle
• Lithium Heparin - Gel (Light Green Cap)

Additional Specimen Information

Specimen Collection Protocols - This test requires both a urine and a plasma sample collected at the same time.
Random Urine and 4.5 mL heparinised blood (green)

Aliquot Instructions

Minimum Volume (ml)

1.0

Transport to Lab

Chilled (2 - 8 degrees Celsius)
If overnight - Chilled (2 - 8 degrees Celsius)

Interpretation

Phosphate is actively reabsorbed by the proximal tubule in the kidney but reabsorption is rarely complete. Reabsorption is inhibited by parathyroid hormone and accounts for some of the changes in the plasma when

Reference Intervals

82 – 97 %

Test Method

See individual analytes. Tests performed on Beckman Coulter AU5822 analysers using Beckman Coulter reagents.

Contact Canterbury Health Laboratories on +64 3 364 0484 or email LabInfo@cdhb.health.nz

Contact Information

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