Home
HelpTest Code LAB2968 Cystine
Clinical System Name
Cystine Quant
Synonyms
Cystine
Sample Requirements
Specimen: Whole Blood
Container(s): Dark Green/Sodium Heparin, Lt. Green/Lithium Heparin
Preferred Vol: 1 mL
Minimum Vol: 0.5 mL
Note: Serum is acceptable but not preferred.
Processing Instructions
Reject due to:
Spin:Y
Aliquot:Y
Temp:-20 C
Storage location: -20 C BCG Box
Off-site collection: Spin and freeze plasma/serum and ship frozen.
Stability
| Temperature | Time |
|---|---|
| Room temp | ≤ 2 hr |
| Refrigerated | 24 hrs |
| Frozen (Plasma/Serum only) | 1 month |
Availability
| STAT | Performed | TAT |
|---|---|---|
| N | M-F | 3 days |
Contact the Biochemical Genetics Lab for requests outside of stated availability (206)987-2216.
Performing Laboratory
Seattle Children's Laboratory
Department
Department: Biochemical Genetics
Phone Number: 206-987-2216
CPT Codes
82131
Methodology
Method: Ion exchange chromatography with post column derivatization
Analytical Volume: 0.1 mL
Limitations:
Description
Quantitation of plasma cystine by ion exchange chromatography - not for cystinosis
Refer to Leuk Cyst (Cystine, WBC) for diagnosis and monitoring of cystinosis
Requisition
Biochemical Genetics Requisition
On the requisition include clinical information needed for appropriate interpretation. (Age, gender, diet (e.g. TPN therapy), drug therapy and family history)
Reference Ranges
| 0 - 1 mo | 1 mo - 5 yr | 6 yr - adult |
| 15 - 55 mcmol/L | 15 - 50 mcmol/L | 15 - 55 mcmol/L |