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Test Code U24 Cystine Cystine, Urine, Timed Collection

Clinical System Name

Cystine Quant urine, 24 hour

Description

Quantitation of cystine by ion exchange chromatography

 

Sample Requirements

Specimen: Urine

Container(s): Sterile Srew-Capped Container

Preferred Vol:  24 hour collection

Minimum Vol: Timed collections other than 24 hr are acceptable.

 

Note:

 

Processing Instructions

Reject due to:

Spin:N

Aliquot:Y

Temp:-20 C

Storage location: -20 C BCG  Box

 

SCHRMC/Off-site collection: Record total volume on requisition. Timed collections other than 24 hr are acceptable. Mix 24 hour jug well and freeze 10 mL aliquot. Ship frozen.

Stability

Temperature Time
Room temp ≤ 2 hr
Refrigerated < 2 hrs
Frozen 1 month

 

Availability

STAT Performed TAT
N M-F 5 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

 

 

Methodology

Method: Ion exchange chromatography with post column derivatization

Analytical Volume: 10.0 mL

Limitations:

CPT Codes

82131

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)

 

On the requisition record the total volume of urine collected.

Reference Ranges

Reference values accompany patient report.