Methodology
CITRR; OXUR; UOSMR; SULFR; CALRR; POUR; UPHR; NAUR; CTURR; URCUR
Synonyms
Brushite Crystal; Calcium Oxalate Crystal; Hydroxyapatite Crystal; Kidney Stone Disease; Kidney Stone Profile; Sodium Urate Crystal; Stone Risk Profile; Uric Acid Crystals
Specimen Type
Urine
Performing Lab
Mayo Medical Lab
Epic ID
Other Reference Test
Lab Test Days
Monday-Friday
Standard TAT
7 Days
Collection Information
Specimen Required
30-40 mL Urine
Container Type
Sterile Container
Processing Information - Lab Use Only
Transport Temperature
Refrigerate-OK/Frozen-OK
Specimen Stability
Room Temp: Unacceptable; Refrigerated: 14 Days; Frozen: 14 Days
Test Volume Required
40 mL Urine
Minimum Test Volume
30 mL Urine
Processing Instructions
Collect a random urine specimen and divide the urine into 6 tubes. Specimen pH>8 indicate bacterial contamination, and testing will be canceled. Do not attempt to adjust pH as it will adversely affect resutls. Specimen must have a pH between 4.5-8 to be acceptable.
Included Tests
Brushite Crystal, Calcium, Calcium/Creatinine Ration, Calcium Oxalate, Chloride, Citrate Concentration, Citrate/Creatinine Ration, Creatinine, Hydroxyapatite Crystal, Magnesium, Magnesium/Creatinine Ration, Osmolality, Oxalate, Oxalate/Creatinine Ration, Oxalate Concentration, pH, Phosphorus, Phosphorus/Creatinine Ration, Potassium, Sodium, Sodium Urate Crystal, Sulfate, Uric Acid, Urice Acid/Creatinine Ratio, and Uric Acid Crystal
Comments
A timed 24-hour urine collection is the preferred specimen for measuring and interpreting this profile to determine kidney stone risk factors. Random collections with individual analytes normalized to urinary creatinine may be of some clinical use in patients who cannot collect a 24-hour specimen, typically small children. Therefore, this test is offered on random collections for children <16 years old.
CPT Codes
82140, 82310, 82436, 82507, 82570, 83735, 83935, 83945, 83986, 84105, 84133, 84300, 84392, 84560
Revised
07-18-16
Initials
SL
© 2023 Rady Children's Hospital–San Diego