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
2-5 Days
Collection Information
Specimen Required
30-40 mL Random Urine
Container Type
Sterile Container
Collection Instructions
Refrigerate specimen after collection. Specimen pH should be between 4.5 and 8 and will stay in this range if kept refrigerated. Specimens with pH above 8 indicate bacterial contamination, and testing will be canceled. Do not attempt to adjust pH as it will adversely affect results.
Processing Information - Lab Use Only
Transport Temperature
Refrigerate-OK/Frozen-OK
Specimen Stability
Room Temp: Unacceptable; Refrigerated: 14 Days; Frozen: 14 Days
Rejection Criteria
pH <4.5 or >8.0
Test Volume Required
40 mL Random Urine
Minimum Test Volume
30 mL Random Urine
Processing Instructions
Collect a random urine specimen and divide the urine into 7 tubes. Refrigerate specimen after collection. Specimen pH should be between 4.5 and 8 and will stay in this range if kept refrigerated. Specimens with pH above 8 indicate bacterial contamination, and testing will be canceled. Do not attempt to adjust pH as it will adversely affect results.
Included Tests
Calcium, Chloride, Citrate excretion, Creatinine, Magnesium, Osmolality, Oxalate, pH, Phosphorus, Potassium, Sodium, Sulfate, Uric acid and Ammonium.
CPT Codes
82310, 82436, 82507, 82570, 83735, 83935, 83945, 83986, 84105, 84133, 84300, 84392, 84560, 82140
Revised
7/19/23
Initials
SA