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Lab Test Dictionary

Supersaturation Profile, 24 Hour, Urine (SUP24)


Brushite Crystal; Calcium Oxalate Crystal; Hydroxyapatite Crystal; Kidney Stone Disease; Kidney Stone Profile; Sodium Urate Crystal; Stone Risk Profile; Uric Acid Crystals; SAT24

Specimen Type

Urine, Timed Collection

Performing Lab

Mayo Medical Lab

Epic ID

Other Reference Test

Lab Test Days


Standard TAT

2-5 Days

Collection Information

Specimen Required

25-35 mL 24-Hour Urine

Container Type

24-Hour Urine Container

Collection Instructions

Collect urine for 24 Hours. Refrigerate specimen during and after collection. Specimen pH should be between 4.5-8.0 and will stay in this range if kept refrigerated. Specimens with pH >8.0 indicate bacterial contamination, and testing will be cancelled. Do not attempt to adjust pH as it will adversely affect results. 24 Hour volume is required. Patient's height in centimeters and weight in kilograms are required if patient is <18 years old.

Processing Information - Lab Use Only

Transport Temperature


Specimen Stability

Room Temp: Unacceptable; Refrigerated: 14 Days (Preferred); Frozen: Unacceptable

Rejection Criteria

Specimen pH>8.0

Test Volume Required

35 mL 24-Hour Urine

Minimum Test Volume

25 mL 24-Hour Urine

Processing Instructions

Indicate 24-hour volume in comments and on specimen. Patient's height in centimeters and weight in kilograms are required if patient is <18 years old. Order test in Mayolink and send with Mayo courier Monday-Friday.

Included Tests

Calcium, Chloride, Citrate excretion, Creatinine, Magnesium, Osmolality, Oxalate, pH, Phosphorus, Potassium, Sodium, Sulfate, Uric acid, Ammonium and Urea Nitrogen.

CPT Codes

82340, 82436, 82507, 82570, 83735, 83935, 83945, 83986, 84105, 84133, 84300, 84392, 84560, 82140, 84540