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Test Name:
StoneRisk® Cystine Test

• SBMF No:
  43142
• Performance Lab Name:
  Quest Diagnostics Nichols Institute
• Test Mnemonic:
  SR CYSTINE
• ABN:
  Not required
• CPT Code:
  82131; 82570
• LOINC Code:
  19146-0
• Ref Lab Test No:
  5525
• Test Includes:
  Cystine
  Creatinine
• Spec Type:
  Urine, 24-hour
• Spec Container:
  Quest 24-hour Urine Collection Kit specific for renal stone formation diagnosis
• Pref Vol:
  Quest 24hr Urine Plain Kit: 60.0 mL
  Quest 24hr Urine Acid Kit: 50.0 mL
• Min Vol:
  Quest 24hr Urine Plain Kit: 30.0 mL
  Quest 24hr Urine Acid Kit: 30.0 mL
• Patient Prep:
  Follow instructions in the kit
• Spec Collect:
  Use only Quest 24-hour Urine Collection Kits specific for renal stone formation diagnosis
  Follow instructions in the kit
• Spec Process:
  Upon completion of 24-hour collection in the large orange collection container, tighten the cap on the container and mix contents in the container vigorously for one minute. A good mix will assure accurate test results.
  Carefully fill the two plastic white vials with urine collected in the large orange container. The two white vials must be filled within two to four hours of completion of 24-hour collection. Fill and cap vials one at a time. Cap both vials tightly, write patients name on each vial and place in zip-lock bags provided (do not remove absorbent sheets).
  Complete the patient information section
  Place specimen in mailback box and return to the laboratory
• Spec Store Transport:
  Room temperature or refrigerated
• Spec Stability:
  10 days room temperature (20-30°C)
  10 days refrigerated (2-8°C)
• Spec Remarks:
  Urine must only be collected and stored in the large orange collection container
  Do not remove sponge from the orange collection container
  Do not remove wool from white container
  Do not collect the first urination at the beginning of 24-hour collection
  During collection process store large orange container in a cool location
• Methodology:
  Immunochemiluminometric Assay
  Spectrophotometry
• Use:
  The custom StoneRisk® Cystine Test is a quantitative analysis of urinary cystine that measures risk factors for kidney stone formation
• Reference Range:
  
  Cystine, Urine
  10-100 mg/day
  
  Creatinine, Urine
  Male: 800-2000 mg/day
  Female: 600-1800 mg/day
• Day Run:
  Tue, Fri
• Time Reported:
  Next day
  This is a sendout test. Please note that turnaround time is defined as the anticipated time from set up day to results release.
• Test Type:
  URINE