Test/Investigation
TmP/GFR (Calculation)
Site(s) or Laboratory offering Test/Investigation
NNUH (Biochemistry)
Indications
The ratio of tubular maximum reabsorption of phosphate (TmP) to GFR is used to evaluate renal phosphate transport
Comments/Precautions
Procedure: 1. Overnight fast 2. The first voided urine should be discarded. 3. Collect a 25 ml sample of the second void urine into a universal container for urine creatinine and phosphate 4. Send with serum electrolytes and phosphate. Contact the Duty Biochemist at NNUH for advice on ordering this test.
Sample type
Paired random urine sample and serum (yellow top) blood sample required for calculation.
Turnaround times (TAT) Urgent/Routine/GP or OPD
Please refer to the individual tests included in this dynamic function test for turn-around times.
If UKAS Accredited Test indicate at which site
Please refer to the individual tests included in this dynamic function test