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Test Code Cystine U Cystine Quantitative, Urine Random

Clinical System Name

Cystine, U Rand Qnt

Description

Quantitation of cystine by ion exchange chromatography

 

Sample Requirements

Specimen: Urine

Container(s): Sterile Srew-Capped Container

Preferred Vol:  5.0 mL

Minimum Vol: 1.0 mL

 

Processing Instructions

Reject due to:

Spin:N

Aliquot:Y

Temp:-20 C

Storage location: -20 C BCG  Box

 

SCHRMC/Off-site collection: Mix urine well and freeze a maximum10 mL aliquote. Ship frozen.

Stability

Temperature Time
Room temp ≤ 24hr
Refrigerated < 24 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: 1.0 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)

 

Reference Ranges

<75 mg/gram creatinine

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