| 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
Preferred Specimen
4 mL of 24 hour or other timed urine collection collected in a 24-hour urine collection container
Minimum Volume
3 mL
Instructions
Avoid dilute urine when possible. Refrigerate 24-hour/timed specimens during collection. Mix urine well. Transfer 4 mL aliquot urine to ARUP Standard Transport Tubes and freeze immediately (Min: 3 mL). 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 (e.g., 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.
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 (e.g., 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 Temperature
Frozen
Specimen Stability
Room temperature: Unacceptable
Refrigerated: Unacceptable
Frozen: 30 days
Refrigerated: Unacceptable
Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Refrigerated or room temperature specimens
Methodology
Liquid Chromatography/Tandem Mass Spectrometry
FDA Status
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the U.S. Food and Drug Administration. This test was performed in a CLIA-certified laboratory and is intended for clinical purposes.
Setup Schedule
Set up: Daily; Report available: 3-7 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
