| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Cystine Quantitative, Urine
Test Code13810
CPT Codes
82131
Includes
Creatinine
Preferred Specimen
4 mL frozen 24-hour or other timed urine collection, collected in a 24-hour collection container
Minimum Volume
3 mL
Instructions
Avoid dilute urine when possible. Refrigerate 24-hour/timed specimens during collection.
Mix urine well. Transfer a 4 mL aliquot of urine to a standard transport tube and freeze immediately. Record total volume and collection time interval on transport tube and test request form.
Critical frozen. Separate specimens must be submitted when multiple tests are ordered.
Clinical information is needed for appropriate interpretation. Additional required information includes age, gender, diet (eg, TPN therapy), drug therapy, and family history. Biochemical Genetics Patient History Form is available on the ARUP Web site or by contacting ARUP client services.
Mix urine well. Transfer a 4 mL aliquot of urine to a standard transport tube and freeze immediately. Record total volume and collection time interval on transport tube and test request form.
Critical frozen. Separate specimens must be submitted when multiple tests are ordered.
Clinical information is needed for appropriate interpretation. Additional required information includes age, gender, diet (eg, TPN therapy), drug therapy, and family history. Biochemical Genetics Patient History Form is available on the ARUP Web site or by contacting ARUP client services.
Transport Container
24-hour collection container
Transport Temperature
Frozen
Specimen Stability
Room temperature: Unacceptable
Refrigerated: Unacceptable
Frozen: 30 days
Refrigerated: Unacceptable
Frozen: 30 days
Methodology
Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)
FDA Status
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.
Setup Schedule
Daily
Report Available
4-9 days
Reference Range
See Laboratory Report
Clinical Significance
This test is indicated only to monitor patients with cystinuria on therapy. Use for monitoring treatment of patients previously diagnosed with cystinuria. To diagnose or rule out cystinuria, refer to Cystinuria Panel or Amino Acids Quantitative by LC-MS/MS, Urine.
Performing Laboratory
| A.R.U.P. , Inc. |
| 500 Chipeta Way |
| Salt Lake City, UT 84108-1221 |
Last Updated: November 6, 2024
