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Test Name:
Kidney Stone Risk Panel, Urine, 24-Hour

• SBMF No:
  45574
• Performance Lab Name:
  ARUP Laboratories
• Test Mnemonic:
  KID
• ABN:
  Not required
• CPT Code:
  82340; 82507; 83945; 84560
• LOINC Code:
  30211-7; 19153-6; 21203-5; 6687-8; 18488-7; 6874-2; 2161-8; 2162-6; 27222-9; 2701-1; 21587-1; 3087-4
• Ref Lab Test No:
  0020843
• Test Includes:
  Calcium, Urine
  Citric Acid, Urine
  Creatinine, Urine
  Oxalate, Urine
  Uric Acid, Urine
• Also Known As:
  Renal Stone Risk Panel
• Also See:
  45573 Supersaturation Profile, Urine, 24-Hour
• Spec Type:
  Urine, 24-hour
• Spec Container:
  Kidney Stone/Supersaturation Urine Collection Kit (ARUP supply# 46007)
• Pref Vol:
  4 aliquots of 4.0 mL each
• Spec Collect:
  To begin collection of timed specimen, have patient urinate, noting date and exact time
  Discard this first portion of urine, but document date and time of voiding on container label and test requisition as "start" of timed specimen
  Save all urine voided during designated time period, including portion voided at exact end of time period
  IMPORTANT: Refrigerate entire specimen (2-8°C) during and after collection to prevent bacterial growth
  Document date and time of final voiding on label and requisition as "end" of timed specimen
• Spec Process:
  Upon completion of collection, mix entire specimen well and note 24-hour volume
  1st aliquot: Dispense 4 mL of specimen into the Sulfamic Acid Tube. Mix well, then freeze.
  2nd aliquot: Dispense 4 mL of specimen into the Sodium Carbonate Tube. Mix well, then freeze.
  3rd aliquot: Dispense 4 mL of specimen into an Unpreserved Tube. Mix well, then freeze.
  4th aliquot: Dispense 4 mL of specimen into an Unpreserved Tube. Mix well, then freeze.
  Do not exceed 4 ml in tubes
  Send urine aliquots with notation of 24-hour urine volume on aliquot labels and on requisition
• Spec Store Transport:
  Frozen
• Spec Stability:
  After collection is complete:
  Room temperature (20-30°C): Unacceptable
  12 hours refrigerated (2-8°C)
  3 weeks frozen (-20°C) – Do not use frost-free units that undergo repeated freeze/thaw cycles
• Spec Remarks:
  24-hour urine should be delivered to laboratory ASAP following collection
  Freeze specimens immediately after aliquoting
• Methodology:
  Enzymatic
  Spectrophotometry
• Clinical Significance:
  Refer to:
  
• Reference Range:
  

  Calcium, Urine
  Calcium-free diet: 5-40 mg/d
  Low calcium diet (800 mg/d or less): 50-150 mg/d
  Average calcium diet (about 800 mg/d): 100-250 mg/d
  High calcium diet (800 mg/d or greater): > 250 mg/d

  Citric Acid, Urine
  18 years and older: 320-1240 mg/d

  Creatinine, 24-Hour Urine
  Male
  3-8 years:      140-700 mg/d
  9-12 years:    300-1300 mg/d
  13-17 years:  500-2300 mg/d
  18-50 years:  1000-2500 mg/d
  51-80 years:  800-2100 mg/d
  81 years and older: 600-2000 mg/d

  Female
  3-8 years:      140-700 mg/d
  9-12 years:    300-1300 mg/d
  13-17 years:  400-1600 mg/d
  18-50 years:  700-1600 mg/d
  51-80 years:  500-1400 mg/d
  81 years and older: 400-1300 mg/d

  Oxalate, Urine
  0-12 years: 13-38 mg/d
  Male 13 years and older: 7-44 mg/d
  Female 13 years and older: 4-31 mg/d

  Uric Acid, Urine
  250-750 mg/d

• Day Run:
  Mon-Fri
• Time Reported:
  2-7 days
• Test Type:
  URINE