RTRPP - Specimen: Tubular Reabsorption of Phosphorus, Random

Test Catalog

Test Name

Test ID: RTRPP    
Tubular Reabsorption of Phosphorus, Random

Specimen Type Describes the specimen type needed for testing


Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

Serum and urine are required.


Specimen Type: Serum

Collection Container/Tube: Red top or serum gel

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions:

1. Fasting.

2. Label specimen as serum.


Specimen Type: Urine

Container/Tube: Plastic, 5-mL tube (Supply T465)

Specimen Volume: 5 mL

Collection Instructions:

1. Collect a random urine specimen.

2. No preservative.

3. Label specimen as urine.

Specimen Minimum Volume The amount of sample necessary to provide a clinically relevant result as determined by the Laboratory.

Urine: 1 mL/Serum: 0.25 mL

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected










Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.

Specimen TypeTemperatureTime
SerumFrozen (preferred)7 days
 Refrigerated 7 days
UrineRefrigerated (preferred)