Test Code URUR Urine Uric Acid, Timed

Important Note

If ordering a random collection, use order code RUR.

Specimen and Container/Tube

Specimen Type: Urine, 24 Hour Timed Collection

Preferred Specimen: 24 Hour Sterile Plastic Container

Other Acceptable specimens: Sterile Clean Glass Container

Specimen Stability

Storage Temperature	Stability
Room temperature	Not stable Assay immediately
Refrigerated	Not stable Assay immediately
Frozen	Not stable Assay immediately

Collection Instructions

Provide 24-hour urine collection instructions and container to patient.
Collect specimen per standard laboratory collection procedures.
No preservatives or additives.
Keep 24 hour urine refrigerated during collection process.

Specimen Handling and Transport Instructions

UCMC Onsite Instructions:

Collect specimen per standard collection procedure and send to laboratory immediately.
No preservatives or additives.

UCMC Offsite and UC MedLab Outreach Instructions:

Samples should be centrifuged within 2 hours of collection
No preservatives or additives
Aliquot 10.0 mL of well mixed urine into plastic tube.
Urine samples must then be sent refrigerated at 2-8^oC.

Rejection Criteria

Common specimen rejected situations include: incorrect specimen type, insufficient volume, missing or incomplete specimen identifiers, incorrect specimen transport, or specimens outside stability limits.
Specimens that are collected with preservatives or additives.

Reference Values

Test	Age	Sex	Reference Range
Urine Uric Acid Timed	All	All	250 - 750 mg/24hr

Critical Values

Not applicable

Turnaround Time

Turnaround times are relative to the time the specimen is received in the test laboratory.

STAT Turnaround Time: 1 hour

Routine Turnaround Time: 4 hours

Testing Schedule: 24/7

Clinical Indications

Useful in the assessment and management of patients with kidney stones, particularly uric acid stones.

Test Components

Urine collection duration, Urine total volume, Urine uric acid random, Urine uric acid timed

Methodology

Enzymatic Colorimetric Assay Spectrophotometric (Roche Diagnostics)

CPT Codes

84560

LOINC Codes

3086-6, 3087-4

Synonyms/Keyword Search

24 hour urine uric acid

Additional Information